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Dummer. ゛☀
2017年09月13日
Northern corn leaf blight appears on corn leaves as distinct, grayish green to tan blotches or streaks up to 6″ long. Southern corn leaf blight causes smaller tan spots with reddish brown borders. Young corn plants are most susceptible to these fungal diseases, and if the infection is severe the plants may die.
Corn leaf blight is usually associated with commercial corn plantings. Wet, humid weather favors the spread of the disease and under these conditions corn leaf blight may also infect backyard corn plantings. The fungus overwinters on infected plant debris in the soil.
Prevention and Control
Plant blight-resistant varieties, such as Sugar Buns. Purchase only certified disease-free seed.
Rotate corn to avoid planting it in the same location more than once every three years.
Clean up the garden at the end of the growing season
Compost infected cornstalks in a hot compost pile (material must reach the disease-killing temperature of 150 degrees F for several days) or destroy them.
Corn leaf blight is usually associated with commercial corn plantings. Wet, humid weather favors the spread of the disease and under these conditions corn leaf blight may also infect backyard corn plantings. The fungus overwinters on infected plant debris in the soil.
Prevention and Control
Plant blight-resistant varieties, such as Sugar Buns. Purchase only certified disease-free seed.
Rotate corn to avoid planting it in the same location more than once every three years.
Clean up the garden at the end of the growing season
Compost infected cornstalks in a hot compost pile (material must reach the disease-killing temperature of 150 degrees F for several days) or destroy them.
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Dummer. ゛☀
2017年09月13日
In the vegetable garden, bacterial blight is most often a problem on snap beans and lima beans. (Note that other crops also suffer from bacterial diseases that may be called bacterial blight.) Symptoms of infection are large, water-soaked, pale green spots on leaves that later turn brown. These spots may also appear on pods and can produce a yellowish ooze in wet weather. Leaves infected with halo bacterial blight develop many small dead spots with yellow halos around them; spots on pods produce a cream-colored ooze.
The bacterium overwinters on plant debris and in the soil. High humidity and wet weather promote the spread of the disease.
Prevention and Control
Use a three-year crop rotation for beans.
Space rows and seeds more widely than usual to allow good air circulation among plants.
Don't work in the garden when plants are wet. Splashing water spreads bacteria among plants. Use drip irrigation or soaker hoses rather than overhead watering.
Uproot infected plants and destroy them.
Do not save and plant seeds from infected plants.
The bacterium overwinters on plant debris and in the soil. High humidity and wet weather promote the spread of the disease.
Prevention and Control
Use a three-year crop rotation for beans.
Space rows and seeds more widely than usual to allow good air circulation among plants.
Don't work in the garden when plants are wet. Splashing water spreads bacteria among plants. Use drip irrigation or soaker hoses rather than overhead watering.
Uproot infected plants and destroy them.
Do not save and plant seeds from infected plants.
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Dummer. ゛☀
2017年09月03日
Across the midwest United States, you may find a bright green tree with lacy panicles of creamy white flowers. The catalpa is native to parts of North America and frequently grows in hot dry soils. What is a catalpa tree? It is a softly rounded tree with lovely flowers and interesting pod-like fruit. The plant has an interesting use for fishermen and is an important tree for land reclamation. Try growing a catalpa tree in your yard and admire the attractive leaves and showy spring showers of white flowers.
What is a Catalpa Tree?
Catalpa trees are 40- to 70-foot tall trees with arching canopies and an average lifespan of 60 years. The deciduous plants are hardy to USDA planting zones 4 to 8 and can tolerate moist soils but are more suited to dry areas. The leaves are arrow-shaped and glossy bright green. In fall they turn a bright yellow-green before dropping as cold temperatures and chilly winds arrive. Flowers appear in spring and last into early summer. The fruit is a long bean-shaped pod, 8 to 20 inches long. The tree is useful as a shade tree, along streets and in dry, hard-to-plant sites. However, the pods can become a litter problem.
How to Grow a Catalpa Tree
Catalpa trees are quite adaptable to different soil conditions. They perform well in both full sun to partial shade locations. Growing catalpa trees is easy but they have the tendency to naturalize in areas where the tree isn’t native. This potentially invasive potential is more common in border states around the plant’s natural range. Trees may start from dropped seed but this is easily avoided by raking up the dropped seed pods. The tree is regularly planted to attract catalpa worms, which fishermen freeze and use to attract fish. The ease of catalpa tree care and its rapid growth make it ideal for areas where a quickly maturing tree line is desired.
Catalpa Tree Planting
Choose a bright sunny location for growing Catalpa trees. Ideally, the soil should be moist and rich, although the plant can tolerate dry and inhospitable sites. Dig a hole twice as deep and twice as wide as the root ball. Fluff out the roots to the edges of the hole and fill in around them with well worked soil. Use a stake on young trees to ensure straight growth. Water the plant well and every week until it has established. Once the tree has rooted, water is only needed in periods of extreme drought.
Catalpa Tree Care
Young trees should be pruned to encourage good growth. Prune in spring one year after planting. Remove suckers and train the tree to a straight leader trunk. Once the tree is mature, it is necessary to prune it to keep low growing branches from impeding maintenance under the plant. These are tough trees and don’t require much babying. Fertilize in spring with a balanced fertilizer to promote health. Watch for insects and other pests and avoid overhead watering, which can cause mildew and fungal problems.
What is a Catalpa Tree?
Catalpa trees are 40- to 70-foot tall trees with arching canopies and an average lifespan of 60 years. The deciduous plants are hardy to USDA planting zones 4 to 8 and can tolerate moist soils but are more suited to dry areas. The leaves are arrow-shaped and glossy bright green. In fall they turn a bright yellow-green before dropping as cold temperatures and chilly winds arrive. Flowers appear in spring and last into early summer. The fruit is a long bean-shaped pod, 8 to 20 inches long. The tree is useful as a shade tree, along streets and in dry, hard-to-plant sites. However, the pods can become a litter problem.
How to Grow a Catalpa Tree
Catalpa trees are quite adaptable to different soil conditions. They perform well in both full sun to partial shade locations. Growing catalpa trees is easy but they have the tendency to naturalize in areas where the tree isn’t native. This potentially invasive potential is more common in border states around the plant’s natural range. Trees may start from dropped seed but this is easily avoided by raking up the dropped seed pods. The tree is regularly planted to attract catalpa worms, which fishermen freeze and use to attract fish. The ease of catalpa tree care and its rapid growth make it ideal for areas where a quickly maturing tree line is desired.
Catalpa Tree Planting
Choose a bright sunny location for growing Catalpa trees. Ideally, the soil should be moist and rich, although the plant can tolerate dry and inhospitable sites. Dig a hole twice as deep and twice as wide as the root ball. Fluff out the roots to the edges of the hole and fill in around them with well worked soil. Use a stake on young trees to ensure straight growth. Water the plant well and every week until it has established. Once the tree has rooted, water is only needed in periods of extreme drought.
Catalpa Tree Care
Young trees should be pruned to encourage good growth. Prune in spring one year after planting. Remove suckers and train the tree to a straight leader trunk. Once the tree is mature, it is necessary to prune it to keep low growing branches from impeding maintenance under the plant. These are tough trees and don’t require much babying. Fertilize in spring with a balanced fertilizer to promote health. Watch for insects and other pests and avoid overhead watering, which can cause mildew and fungal problems.
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Dummer. ゛☀
2017年09月03日
Weeping willow is a lovely, graceful tree for a large scale garden. Many consider weeping trees romantic additions to their garden. Featuring silvery green foliage in summer and turning yellow in the fall, these are fast growing, large trees useful for screening or as a focal point in the garden.
Weeping Willow Information
The weeping willow (Salix babylonica) is native to China. These trees are popular worldwide for their unusual weeping branches. Utilized and admired in gardens and the subject of legends from ancient times, these trees grow throughout the Eastern United States, thriving from Michigan to Central Florida and west to Missouri. Some believe the ‘weeping’ refers to the way raindrops stream down the branches, dripping ‘tears’ from the tips. Therefore, this willow is a beloved tree in cemeteries and memorial gardens.
Planting Weeping Willow Trees
When planting weeping willow trees, consider where to place them. They are happiest while basking in full sun with their feet slightly wet. Thus, a lakeside location is recommended. Be aware of their eventual size (60 x 60 feet height and spread potential, or 18 m.) while noting locations of underground pipes. Willow roots tend to seek out and clog pipes. These trees are easy to establish and tolerate soils from acidic to alkaline. Consequently, when planting weeping willow trees, they need only a bit of compost (in poor soil) and a sprinkling of all-purpose fertilizer. Consistent watering helps.
Weeping Willow Care
Weeping willow care may increase as they grow, since they host many insects. Caterpillars and borers feast on the leaves and bark. Caring for a weeping willow includes monitoring the branches too. Keeping an eye on the tree is necessary because branches tend to crack and fail due to age, especially during ice and snow events. The foliage is prone to fungal diseases, and as a result, becomes spotted and unattractive. Insect and disease problems may require treatment to keep the tree looking its best.
Weeping Willow Tree Varieties
Salix babylonica is the variety of weeping willow most commonly planted. Alternatives to the weeping willow include the Niobe Golden willow (Salix alba tristis) and the Dwarf weeping willow (Salix caprea ‘Kilarnock’).
Weeping Willow Information
The weeping willow (Salix babylonica) is native to China. These trees are popular worldwide for their unusual weeping branches. Utilized and admired in gardens and the subject of legends from ancient times, these trees grow throughout the Eastern United States, thriving from Michigan to Central Florida and west to Missouri. Some believe the ‘weeping’ refers to the way raindrops stream down the branches, dripping ‘tears’ from the tips. Therefore, this willow is a beloved tree in cemeteries and memorial gardens.
Planting Weeping Willow Trees
When planting weeping willow trees, consider where to place them. They are happiest while basking in full sun with their feet slightly wet. Thus, a lakeside location is recommended. Be aware of their eventual size (60 x 60 feet height and spread potential, or 18 m.) while noting locations of underground pipes. Willow roots tend to seek out and clog pipes. These trees are easy to establish and tolerate soils from acidic to alkaline. Consequently, when planting weeping willow trees, they need only a bit of compost (in poor soil) and a sprinkling of all-purpose fertilizer. Consistent watering helps.
Weeping Willow Care
Weeping willow care may increase as they grow, since they host many insects. Caterpillars and borers feast on the leaves and bark. Caring for a weeping willow includes monitoring the branches too. Keeping an eye on the tree is necessary because branches tend to crack and fail due to age, especially during ice and snow events. The foliage is prone to fungal diseases, and as a result, becomes spotted and unattractive. Insect and disease problems may require treatment to keep the tree looking its best.
Weeping Willow Tree Varieties
Salix babylonica is the variety of weeping willow most commonly planted. Alternatives to the weeping willow include the Niobe Golden willow (Salix alba tristis) and the Dwarf weeping willow (Salix caprea ‘Kilarnock’).
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Dummer. ゛☀
2017年09月02日
What is Tamarix? Also known as tamarisk, Tamarix is a small shrub or tree marked by slender branches; tiny, grayish-green leaves and pale pink or off-white blooms. Tamarix reaches heights of up to 20 feet, although some species are much smaller. Read on for more Tamarix information.
Tamarix Information and Uses
Tamarix (Tamarix spp.) is a graceful, fast-growing tree that tolerates desert heat, freezing winters, drought and both alkaline and saline soil, although it prefers sandy loam. Most species are deciduous. Tamarix in the landscape works well as a hedge or windbreak, although the tree can appear somewhat scruffy during the winter months. Because of its long taproot and dense growth habit, uses for Tamarix include erosion control, particularly on dry, sloped areas. It also does well in saline conditions.
Is Tamarix Invasive?
Before planting Tamarix, keep in mind that the plant has high potential for invasiveness in USDA growing zones 8 through 10. Tamarix is a non-native plant that has escaped its boundaries and, as a result, has created serious problems in mild climates, especially in riparian areas where the dense thickets crowd out native plants and the long taproots draw large amounts of water from the soil. The plant also absorbs salt from the groundwater, accumulates it in the leaves, and eventually deposits the salt back to the soil, often in concentrations high enough to be harmful to native vegetation.
Tamarix is extremely difficult to control, as it spreads by roots, stem fragments and seeds, which are dispersed by water and wind. Tamarix is listed as a noxious weed in nearly all western states and is extremely problematic in the Southwest, where it has severely reduced underground water levels and threatened many native species. However, Athel tamarix (Tamarix aphylla), also known as saltcedar or athel tree, is an evergreen species often used as an ornamental. It tends to be less invasive than other species.
Tamarix Information and Uses
Tamarix (Tamarix spp.) is a graceful, fast-growing tree that tolerates desert heat, freezing winters, drought and both alkaline and saline soil, although it prefers sandy loam. Most species are deciduous. Tamarix in the landscape works well as a hedge or windbreak, although the tree can appear somewhat scruffy during the winter months. Because of its long taproot and dense growth habit, uses for Tamarix include erosion control, particularly on dry, sloped areas. It also does well in saline conditions.
Is Tamarix Invasive?
Before planting Tamarix, keep in mind that the plant has high potential for invasiveness in USDA growing zones 8 through 10. Tamarix is a non-native plant that has escaped its boundaries and, as a result, has created serious problems in mild climates, especially in riparian areas where the dense thickets crowd out native plants and the long taproots draw large amounts of water from the soil. The plant also absorbs salt from the groundwater, accumulates it in the leaves, and eventually deposits the salt back to the soil, often in concentrations high enough to be harmful to native vegetation.
Tamarix is extremely difficult to control, as it spreads by roots, stem fragments and seeds, which are dispersed by water and wind. Tamarix is listed as a noxious weed in nearly all western states and is extremely problematic in the Southwest, where it has severely reduced underground water levels and threatened many native species. However, Athel tamarix (Tamarix aphylla), also known as saltcedar or athel tree, is an evergreen species often used as an ornamental. It tends to be less invasive than other species.
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Dummer. ゛☀
2017年09月02日
Tall, fast growing and durable, the sycamore tree—with its large, maple-like leaves—is an elegant addition to your backyard landscape. Its most recognizable feature is its bark that peels away as the trunk expands, revealing the white, tan and green inner bark. However, it is possible that you experience problems with sycamore trees. These can range from sycamore tree pests to sycamore tree diseases. Read on for information on sycamore tree problems.
Avoiding Problems with Sycamore Trees
Sycamore trees are vulnerable to diseases and insect pests, just like almost every variety of tree you can plant. Experts advise that you keep your tree healthy, with good cultural practices, as a first line of defense against problems with sycamore trees.
Generally, the healthier and more vital the tree, the less it will experience sycamore tree problems. However, even well placed, irrigated and fertilized sycamore trees can get some pests and diseases.
Sycamore Tree Pests
One of the most common sycamore tree pests is the sycamore lace bug that gets its name from the lacy pattern on the adult’s wings, head, and chest. The insects feed on the undersides of the sycamore’s leaves. While the sycamore lace bug’s damage is rarely serious, a heavy infestation can slow the tree’s growth. Keep an eye on your tree leaves and wash off bugs with the hose. Insecticides are also available.
Diseases of Sycamore Trees
You’ll find that there are quite a few diseases of sycamore trees. The most dangerous of the diseases of sycamore trees is anthracnose, also called leaf and twig blight. It can kill American sycamore, although it does only minor damage to other varieties. This disease can kill twig tips, expanding to buds, new shoots and leaves. The symptom you see most frequently is crinkling and browning of the leaves. This sycamore tree disease is most likely to strike when the weather is cool and wet. Spores from the fungus can be spread by rain and wind. If you give your trees sufficient water and fertilizer, you are unlikely to see this sycamore tree disease.
Another common disease of sycamore trees include powdery mildew fungus. It can be treated with fungicides. Bacterial leaf scorch can also be a problem. It is caused by Xylella fastidiosa, a bacterial pathogen that kills off entire branches of the tree. Pruning infected branches can slow its spread.
Avoiding Problems with Sycamore Trees
Sycamore trees are vulnerable to diseases and insect pests, just like almost every variety of tree you can plant. Experts advise that you keep your tree healthy, with good cultural practices, as a first line of defense against problems with sycamore trees.
Generally, the healthier and more vital the tree, the less it will experience sycamore tree problems. However, even well placed, irrigated and fertilized sycamore trees can get some pests and diseases.
Sycamore Tree Pests
One of the most common sycamore tree pests is the sycamore lace bug that gets its name from the lacy pattern on the adult’s wings, head, and chest. The insects feed on the undersides of the sycamore’s leaves. While the sycamore lace bug’s damage is rarely serious, a heavy infestation can slow the tree’s growth. Keep an eye on your tree leaves and wash off bugs with the hose. Insecticides are also available.
Diseases of Sycamore Trees
You’ll find that there are quite a few diseases of sycamore trees. The most dangerous of the diseases of sycamore trees is anthracnose, also called leaf and twig blight. It can kill American sycamore, although it does only minor damage to other varieties. This disease can kill twig tips, expanding to buds, new shoots and leaves. The symptom you see most frequently is crinkling and browning of the leaves. This sycamore tree disease is most likely to strike when the weather is cool and wet. Spores from the fungus can be spread by rain and wind. If you give your trees sufficient water and fertilizer, you are unlikely to see this sycamore tree disease.
Another common disease of sycamore trees include powdery mildew fungus. It can be treated with fungicides. Bacterial leaf scorch can also be a problem. It is caused by Xylella fastidiosa, a bacterial pathogen that kills off entire branches of the tree. Pruning infected branches can slow its spread.
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Dummer. ゛☀
2017年09月02日
The Osage orange tree is an unusual tree. Its fruit are wrinkled green balls the size of grapefruit. On the other hand, the trees’ yellow wood is strong and flexible, and so dense that it is immune to termites. Growing an Osage orange tree is fast and easy. Read on for information about Osage orange trees.
What is Osage Orange?
Many people have never heard of this tree. If you mention it, expect questions like: “What is Osage orange?”
The Osage orange tree (Maclura pomifera) is no kin to the citrus, but the fruit has a faint orangey fragrance strong enough to result in the common name. Its odd shape and color have given it many nicknames, including green brains and hedge apple. The tree also bears long, tough thorns, sharp as steel and can bust tires. These make it a top choice as a defensive hedge. For years, these trees were used for hedges throughout the eastern half of the nation. Farmers planted the tough little trees in tight rows and pruned them well to keep them bushy.
The invention of barbed wire put an end to living Osage hedges, but the wood continued being used for fence posts. It contains tetrahydroxystilbene, an anti-fungicide that may deter insects. Perhaps this chemical is what gives the dense wood its resistance to rot. It’s an excellent wood for fence posts and ship masts. If you are interested in growing an Osage orange tree in a hedge, it will likely stay under 20 feet tall, but in the wild, trees can grow much taller. The trunk grows to several feet in diameter.
Osage Orange Growing Conditions
Growing an Osage orange trees is not difficult since the trees grow readily from both seeds and cuttings. Separating the seeds can be a challenge. It is easiest if you wait for fruit to fall to the ground and freeze in winter, since the cold temperatures facilitate seed-removal. Start growing Osage orange trees by planting individual seeds in pots indoors. Don’t start them outside unless you know exactly where you want them to stand in the garden. These trees are not easy to transplant from one place to another outside.
Osage are tough native trees and are not picky about growing conditions. This makes the care of Osage orange trees easy. Well-drained soil, adequate irrigation and a sunny location helps the tree grow rapidly and stay healthy. If all this information about Osage orange trees makes you want to start growing one, the squirrels will thank you. Osage orange seeds are a favorite squirrel snack.
What is Osage Orange?
Many people have never heard of this tree. If you mention it, expect questions like: “What is Osage orange?”
The Osage orange tree (Maclura pomifera) is no kin to the citrus, but the fruit has a faint orangey fragrance strong enough to result in the common name. Its odd shape and color have given it many nicknames, including green brains and hedge apple. The tree also bears long, tough thorns, sharp as steel and can bust tires. These make it a top choice as a defensive hedge. For years, these trees were used for hedges throughout the eastern half of the nation. Farmers planted the tough little trees in tight rows and pruned them well to keep them bushy.
The invention of barbed wire put an end to living Osage hedges, but the wood continued being used for fence posts. It contains tetrahydroxystilbene, an anti-fungicide that may deter insects. Perhaps this chemical is what gives the dense wood its resistance to rot. It’s an excellent wood for fence posts and ship masts. If you are interested in growing an Osage orange tree in a hedge, it will likely stay under 20 feet tall, but in the wild, trees can grow much taller. The trunk grows to several feet in diameter.
Osage Orange Growing Conditions
Growing an Osage orange trees is not difficult since the trees grow readily from both seeds and cuttings. Separating the seeds can be a challenge. It is easiest if you wait for fruit to fall to the ground and freeze in winter, since the cold temperatures facilitate seed-removal. Start growing Osage orange trees by planting individual seeds in pots indoors. Don’t start them outside unless you know exactly where you want them to stand in the garden. These trees are not easy to transplant from one place to another outside.
Osage are tough native trees and are not picky about growing conditions. This makes the care of Osage orange trees easy. Well-drained soil, adequate irrigation and a sunny location helps the tree grow rapidly and stay healthy. If all this information about Osage orange trees makes you want to start growing one, the squirrels will thank you. Osage orange seeds are a favorite squirrel snack.
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Dummer. ゛☀
2017年09月02日
If you think your yard is too small for oak trees, think again. Columnar oak trees (Quercus robur ‘Fastigiata’) offer the magnificent green lobed foliage and ridged bark that other oaks have, without taking up all that space. What are columnar oak trees? They are slow-growing, slender oaks with a tight, upright and narrow profile. Read on for more columnar oak information.
What are Columnar Oak Trees?
These unusual and attractive trees, also called upright English oak trees, were first found growing wild in a forest in Germany. These types of columnar oaks were propagated by grafting.
Columnar oak tree growth is moderately slow and the trees grow up, not out. With these trees, you don’t have to worry about the spreading lateral branches you associate with other oaks. Columnar oak trees might grow to 60 feet tall, but the spread will remain about 15 feet. The dark green leaves turn brown or yellow in autumn and remain on the tree for months before they fall in winter. The trunk of the columnar oak is covered in dark brown bark, deeply ridged and very attractive. The tree has small acorns hanging on the branches most of the winter that attract squirrels.
Columnar Oak Information
These ‘fastigata’ types of columnar oaks are easy-care trees with outstanding ornamental qualities. Because the columnar oak tree growth direction is up, not out, they are useful in areas where you don’t have room for wide trees; the crown of the columnar oak remains tight and no branches break out of the crown and wander out from the trunk. Ideal columnar oak tree growth conditions include a sunny location. Plant these oaks in direct sun on well-drained acidic or slightly alkaline soil. They are extremely adaptable and very tolerant of urban conditions. They also tolerate drought and aerosol salt.
Caring for Columnar Oak Trees
You will find that caring for columnar oak trees is not difficult. The trees tolerate drought, but do best with occasional irrigation. These are good trees for cooler climates. They thrive in U.S. Department of Agriculture plant hardiness zones 4 or 5 through 8.
What are Columnar Oak Trees?
These unusual and attractive trees, also called upright English oak trees, were first found growing wild in a forest in Germany. These types of columnar oaks were propagated by grafting.
Columnar oak tree growth is moderately slow and the trees grow up, not out. With these trees, you don’t have to worry about the spreading lateral branches you associate with other oaks. Columnar oak trees might grow to 60 feet tall, but the spread will remain about 15 feet. The dark green leaves turn brown or yellow in autumn and remain on the tree for months before they fall in winter. The trunk of the columnar oak is covered in dark brown bark, deeply ridged and very attractive. The tree has small acorns hanging on the branches most of the winter that attract squirrels.
Columnar Oak Information
These ‘fastigata’ types of columnar oaks are easy-care trees with outstanding ornamental qualities. Because the columnar oak tree growth direction is up, not out, they are useful in areas where you don’t have room for wide trees; the crown of the columnar oak remains tight and no branches break out of the crown and wander out from the trunk. Ideal columnar oak tree growth conditions include a sunny location. Plant these oaks in direct sun on well-drained acidic or slightly alkaline soil. They are extremely adaptable and very tolerant of urban conditions. They also tolerate drought and aerosol salt.
Caring for Columnar Oak Trees
You will find that caring for columnar oak trees is not difficult. The trees tolerate drought, but do best with occasional irrigation. These are good trees for cooler climates. They thrive in U.S. Department of Agriculture plant hardiness zones 4 or 5 through 8.
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Dummer. ゛☀
2017年09月01日
Fruitless mulberry trees are popular landscaping trees. The reason that they are so popular is due to the fact that they are fast growing, have a lush canopy of dark green leaves and are tolerant of many urban conditions, plus, unlike their cousins the red and white mulberry tree, they do not make a mess with their fruit. Because of their popularity, many people become alarmed when the mulberry tree leaves start turning yellow. There are many reasons fruitless mulberry tree leaves turn yellow.
Mulberry Leaf Spot
Mulberry leaf spot is caused by a type of fungi that attacks the leaves of the tree. Fruitless mulberry trees are particularly susceptible to it. Mulberry leaf spot can be identified by the leaves growing somewhat malformed, yellowed and having black spots.
Mulberry leaf spot can be treated with fungicide. Even without treatment, fruitless mulberry trees can normally survive this disease. The important thing to remember is that you will need to clean up and dispose of all the fallen leaves in the fall or winter. The mulberry leaf spot fungi over winter on the fallen leaves and in the spring, the rain will splash the fungi back onto the tree, which re-infects it for the next year. Removing and destroying the fallen leaves will help prevent this.
Not Enough Water
Fruitless mulberry trees grow rapidly and their root systems can grow to a massive size. What this means is that what may have been enough water one year will not be enough water the next. When the tree does not get enough water, the mulberry gets yellow leaves. A mulberry tree may be particularly prone to this during periods of drought when the leaves will be transpiring water faster than the roots can take it up.. The best course of action is too water the tree deeply about once a week. Watering deeply is better for the tree than multiple shallow waterings. A deep watering will get the water down into the root system so that more of the roots will be able to take water up at the same rate as the leaves transpire it.
Cotton Root Rot
Cotton root rot is another fungus that can cause a mulberry to have yellow leaves. Cotton root rot is characterized by yellowing leaves followed by wilting. The leaves will not fall off the plant though. Unfortunately, by the time the symptoms of cotton root rot are seen, the tree has most likely been damaged beyond repair and will most likely die within a year. Calling an arborist to look at the situation is advised due to the fact that cotton root rot will continue to spread in the soil and kill other surrounding plants and trees.
Hopefully your mulberry tree will recover from whatever problem is causing the mulberry tree leaves to turn yellow. Fruitless mulberry trees are amazingly resilient and yours should bounce back in no time at all.
Mulberry Leaf Spot
Mulberry leaf spot is caused by a type of fungi that attacks the leaves of the tree. Fruitless mulberry trees are particularly susceptible to it. Mulberry leaf spot can be identified by the leaves growing somewhat malformed, yellowed and having black spots.
Mulberry leaf spot can be treated with fungicide. Even without treatment, fruitless mulberry trees can normally survive this disease. The important thing to remember is that you will need to clean up and dispose of all the fallen leaves in the fall or winter. The mulberry leaf spot fungi over winter on the fallen leaves and in the spring, the rain will splash the fungi back onto the tree, which re-infects it for the next year. Removing and destroying the fallen leaves will help prevent this.
Not Enough Water
Fruitless mulberry trees grow rapidly and their root systems can grow to a massive size. What this means is that what may have been enough water one year will not be enough water the next. When the tree does not get enough water, the mulberry gets yellow leaves. A mulberry tree may be particularly prone to this during periods of drought when the leaves will be transpiring water faster than the roots can take it up.. The best course of action is too water the tree deeply about once a week. Watering deeply is better for the tree than multiple shallow waterings. A deep watering will get the water down into the root system so that more of the roots will be able to take water up at the same rate as the leaves transpire it.
Cotton Root Rot
Cotton root rot is another fungus that can cause a mulberry to have yellow leaves. Cotton root rot is characterized by yellowing leaves followed by wilting. The leaves will not fall off the plant though. Unfortunately, by the time the symptoms of cotton root rot are seen, the tree has most likely been damaged beyond repair and will most likely die within a year. Calling an arborist to look at the situation is advised due to the fact that cotton root rot will continue to spread in the soil and kill other surrounding plants and trees.
Hopefully your mulberry tree will recover from whatever problem is causing the mulberry tree leaves to turn yellow. Fruitless mulberry trees are amazingly resilient and yours should bounce back in no time at all.
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Dummer. ゛☀
2017年08月31日
Flat stems of feathery, blue-green foliage and ornamental bark combine to make Leyland cypress an appealing choice for medium to large landscapes. Leyland cypress trees grow three feet or more per year, making it an excellent choice for a quick specimen or lawn tree, or a privacy hedge. Information about Leyland cypress will help with growing healthy trees.
Information About Leyland Cypress
Leland cypress (x Cupressocyparis leylandii) is a rare, but successful, hybrid between two different genera: Cupressus and Chamaecyparis. Leyland cypress has a short lifespan for an evergreen tree, surviving for 10 to 20 years. This tall evergreen conifer is grown commercially in the Southeast as a Christmas tree. The tree grows to a height of 50 to 70 feet, and although the spread is only 12 to 15 feet, it may overwhelm small, residential properties. Therefore, larger areas are most suitable for growing a Leyland cypress tree. The tree is also useful in coastal landscapes where it tolerates salt spray.
How to Grow Leyland Cypress Trees
Leyland cypress trees need a location in full sun or partial shade and a rich, well-drained soil. Avoid windy sites where the tree may be blown over. Plant the tree so that the soil line on the tree is even with the surrounding soil in a hole about twice as wide as the root ball. Backfill the hole with the soil that you removed from it without amendments. Press down with your foot as you fill the hole to remove any air pockets that may be present.
Leyland Cypress Care
Leyland cypress trees need very little care. Water them deeply during prolonged drought, but avoid overwatering, which can lead to root rot. The tree doesn’t need regular fertilization. Watch for bagworms and, if possible, remove the bags before the larvae they contain have a chance to emerge.
Growing a Leyland Cypress Pruned Hedge
Its narrow, columnar growth pattern makes Leyland cypress ideal for use as a hedge to screen out unsightly views or protect your privacy. To form a pruned hedge, set out the trees with 3 feet of space between them. When they reach a height about a foot beyond the desired height of the hedge, top them to about 6 inches below that height. Prune the shrubs every year in midsummer to maintain the height and shape the hedge. Pruning during damp weather, however, can lead to disease.
Information About Leyland Cypress
Leland cypress (x Cupressocyparis leylandii) is a rare, but successful, hybrid between two different genera: Cupressus and Chamaecyparis. Leyland cypress has a short lifespan for an evergreen tree, surviving for 10 to 20 years. This tall evergreen conifer is grown commercially in the Southeast as a Christmas tree. The tree grows to a height of 50 to 70 feet, and although the spread is only 12 to 15 feet, it may overwhelm small, residential properties. Therefore, larger areas are most suitable for growing a Leyland cypress tree. The tree is also useful in coastal landscapes where it tolerates salt spray.
How to Grow Leyland Cypress Trees
Leyland cypress trees need a location in full sun or partial shade and a rich, well-drained soil. Avoid windy sites where the tree may be blown over. Plant the tree so that the soil line on the tree is even with the surrounding soil in a hole about twice as wide as the root ball. Backfill the hole with the soil that you removed from it without amendments. Press down with your foot as you fill the hole to remove any air pockets that may be present.
Leyland Cypress Care
Leyland cypress trees need very little care. Water them deeply during prolonged drought, but avoid overwatering, which can lead to root rot. The tree doesn’t need regular fertilization. Watch for bagworms and, if possible, remove the bags before the larvae they contain have a chance to emerge.
Growing a Leyland Cypress Pruned Hedge
Its narrow, columnar growth pattern makes Leyland cypress ideal for use as a hedge to screen out unsightly views or protect your privacy. To form a pruned hedge, set out the trees with 3 feet of space between them. When they reach a height about a foot beyond the desired height of the hedge, top them to about 6 inches below that height. Prune the shrubs every year in midsummer to maintain the height and shape the hedge. Pruning during damp weather, however, can lead to disease.
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Dummer. ゛☀
2017年08月31日
Leyland Cypress (x Cupressocyparis leylandii) is a large, fast-growing, evergreen conifer that can easily reach 60-80’ in height and 20’ wide. It has a natural pyramidal shape and elegant, dark green, fine-textured foliage. When they become too large or unsightly, trimming Leyland Cypress trees becomes necessary.
Leyland Cypress Pruning
Leyland Cypress is often used as a quick screen because it can grow up to 4 feet per year. It makes an excellent windbreak or property boundary border. Because it is so large, it can quickly outgrow its space. For this reason, the native East Coast specimen looks best on large lots where it is allowed to maintain its natural form and size.
Since Leyland Cypress grows so wide, do not plant them too close together. Space them at least 8 feet apart. Otherwise, the overlapping, scraping branches can wound the plant and, therefore, leave an opening for disease and pests. In addition to proper location and spacing, pruning Leyland Cypress is occasionally needed – especially if you don’t have enough room or if it’s outgrown the allotted space.
How to Trim a Leyland Cypress Tree
Pruning Leyland Cypress into a formal hedge is a common practice. The tree can take severe pruning and trimming. If you are wondering when to prune Leyland Cypress, then summer is your best time frame. During the first year, trim the top and sides to start forming the shape you desire. During the second and third year, trim just the side branches that have wandered out too far to maintain and encourage foliage density.
Leyland Cypress pruning changes once the tree reaches the desired height. At that point, annually trim the top six to twelve inches below the desired height. When it regrows, it will fill in more thickly.
Leyland Cypress Pruning
Leyland Cypress is often used as a quick screen because it can grow up to 4 feet per year. It makes an excellent windbreak or property boundary border. Because it is so large, it can quickly outgrow its space. For this reason, the native East Coast specimen looks best on large lots where it is allowed to maintain its natural form and size.
Since Leyland Cypress grows so wide, do not plant them too close together. Space them at least 8 feet apart. Otherwise, the overlapping, scraping branches can wound the plant and, therefore, leave an opening for disease and pests. In addition to proper location and spacing, pruning Leyland Cypress is occasionally needed – especially if you don’t have enough room or if it’s outgrown the allotted space.
How to Trim a Leyland Cypress Tree
Pruning Leyland Cypress into a formal hedge is a common practice. The tree can take severe pruning and trimming. If you are wondering when to prune Leyland Cypress, then summer is your best time frame. During the first year, trim the top and sides to start forming the shape you desire. During the second and third year, trim just the side branches that have wandered out too far to maintain and encourage foliage density.
Leyland Cypress pruning changes once the tree reaches the desired height. At that point, annually trim the top six to twelve inches below the desired height. When it regrows, it will fill in more thickly.
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Dummer. ゛☀
2017年08月30日
Growing a red twig dogwood is a great way to add spectacular color to the winter garden. The stems, which are green in spring and summer, turn bright red when the foliage drops off in autumn. The shrub produces creamy-white flowers in spring and berries that ripen from green to white by the end of summer. Both fruits and flowers look good against the dark background of the foliage, but pale in comparison to the brilliant winter display.
Growing a Red Twig Dogwood
Don’t confuse red twig dogwood trees with other dogwood trees. While both the tree and the shrub belong to the Cornus genus, red twig dogwoods never grow to become trees. There are two species of Cornus called red twig dogwoods: Tatarian dogwood (C. alba) and Redosier dogwood (C. sericea). The two species are very similar. Red twig dogwood is one of those plants where more is better. They look fantastic when planted in groups or as an informal hedge. When planting red twig dogwoods, give them plenty of room. They grow up to 8 feet tall with an 8 foot spread. Overcrowding encourages diseases and causes less attractive, thin stems.
Red Twig Dogwood Care
Red twig dogwood care is minimal except for pruning. Annual pruning is essential to keep the brilliant colors of the twigs. The primary goal of pruning red twig dogwoods is to remove the old stems that no longer show good winter color. Remove about a third of the stems at ground level every year. Cut out old, weak stems as well as well as those that are damaged, discolored, or growing poorly. This method of pruning keeps the color bright and the shrub vigorous. After thinning you can shorten the stems to control the height if you’d like. Cut back the entire shrub to 9 inches above the ground if it becomes overgrown or out of control. This is a good way to quickly renew the plant, but it leaves a bare spot in the landscape until it regrows.
Water weekly in the absence of rain for the first couple of months after planting red twig dogwoods, and cut back on the water once the shrub is established. Mature shrubs only need watering during dry spells. Feed the plant once a year with a layer of compost or a sprinkling of slow-released fertilizer over the root zone.
Growing a Red Twig Dogwood
Don’t confuse red twig dogwood trees with other dogwood trees. While both the tree and the shrub belong to the Cornus genus, red twig dogwoods never grow to become trees. There are two species of Cornus called red twig dogwoods: Tatarian dogwood (C. alba) and Redosier dogwood (C. sericea). The two species are very similar. Red twig dogwood is one of those plants where more is better. They look fantastic when planted in groups or as an informal hedge. When planting red twig dogwoods, give them plenty of room. They grow up to 8 feet tall with an 8 foot spread. Overcrowding encourages diseases and causes less attractive, thin stems.
Red Twig Dogwood Care
Red twig dogwood care is minimal except for pruning. Annual pruning is essential to keep the brilliant colors of the twigs. The primary goal of pruning red twig dogwoods is to remove the old stems that no longer show good winter color. Remove about a third of the stems at ground level every year. Cut out old, weak stems as well as well as those that are damaged, discolored, or growing poorly. This method of pruning keeps the color bright and the shrub vigorous. After thinning you can shorten the stems to control the height if you’d like. Cut back the entire shrub to 9 inches above the ground if it becomes overgrown or out of control. This is a good way to quickly renew the plant, but it leaves a bare spot in the landscape until it regrows.
Water weekly in the absence of rain for the first couple of months after planting red twig dogwoods, and cut back on the water once the shrub is established. Mature shrubs only need watering during dry spells. Feed the plant once a year with a layer of compost or a sprinkling of slow-released fertilizer over the root zone.
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Dummer. ゛☀
2017年08月30日
The giant dogwood has such an appealing appearance that it’s also known as wedding cake tree. This is due to its tiered branch structure and elegantly variegated white and green leaves. Wedding cake tree care for young plants should be consistent until establishment but mature variegated giant dogwood trees are quite hardy and tolerant provided they are kept moist. Read on to learn more about this interesting flowering dogwood variety.
Giant Dogwood Information
The wedding cake dogwood has the grown up moniker Cornus controversa ‘Variegata.’ This lovely tree grows up to 50 feet tall but more commonly 25 to 30 in height. It is a native of Asia, which can be planted in United States Department of Agriculture zones 5 through 8. These trees are easy to grow and susceptible to only a few pests and diseases.
The wedding cake dogwood is a fast growing tree that does well in either partial shade or full sun. The limbs are horizontal, giving the appearance of layering, but as the plant matures they tend to droop a bit. In spring, it produces a brilliant display of creamy white flowers. An interesting nugget of giant dogwood information reveals these flowers to be leaves. The flowers are actually bracts, or modified leaves, that form around the very tiny and mundane real flower. The flowers develop into bluish-black berries that are favorites of birds, squirrels and other animals. In fall, the leaves turn a rich red and in spring the bright green tops of new leaves compliments the variegated silvery white tinged under leaves.
Growing a Giant Dogwood Tree
These trees are not found in many nurseries, but if you are lucky enough to find one, take care to situate it in a good location and provide basic wedding cake tree care as it establishes. The best place for variegated giant dogwood trees is in slightly acidic soil where there is dappled lighting. It will also perform well in full sun situations. You can plant it in either clay or loam but the soil should be slightly moist but not boggy. Take care to provide enough space above and on the sides for the adult height and spread of this majestic tree.
Care of the Wedding Cake Dogwood
After planting, it is a good idea to stake the young tree for straight strong growth. Provide water weekly for the first few months, and thereafter supplement moisture in very dry periods and in summer with a deep drench every couple of weeks. This tree is resistant to many pests but does occasionally has a problem with dogwood borers and scale. It is resistant to Verticillium but may become prey to canker diseases and root rot. Overall it is a very easy tree to care for and worth having for its many seasons of interest.
Giant Dogwood Information
The wedding cake dogwood has the grown up moniker Cornus controversa ‘Variegata.’ This lovely tree grows up to 50 feet tall but more commonly 25 to 30 in height. It is a native of Asia, which can be planted in United States Department of Agriculture zones 5 through 8. These trees are easy to grow and susceptible to only a few pests and diseases.
The wedding cake dogwood is a fast growing tree that does well in either partial shade or full sun. The limbs are horizontal, giving the appearance of layering, but as the plant matures they tend to droop a bit. In spring, it produces a brilliant display of creamy white flowers. An interesting nugget of giant dogwood information reveals these flowers to be leaves. The flowers are actually bracts, or modified leaves, that form around the very tiny and mundane real flower. The flowers develop into bluish-black berries that are favorites of birds, squirrels and other animals. In fall, the leaves turn a rich red and in spring the bright green tops of new leaves compliments the variegated silvery white tinged under leaves.
Growing a Giant Dogwood Tree
These trees are not found in many nurseries, but if you are lucky enough to find one, take care to situate it in a good location and provide basic wedding cake tree care as it establishes. The best place for variegated giant dogwood trees is in slightly acidic soil where there is dappled lighting. It will also perform well in full sun situations. You can plant it in either clay or loam but the soil should be slightly moist but not boggy. Take care to provide enough space above and on the sides for the adult height and spread of this majestic tree.
Care of the Wedding Cake Dogwood
After planting, it is a good idea to stake the young tree for straight strong growth. Provide water weekly for the first few months, and thereafter supplement moisture in very dry periods and in summer with a deep drench every couple of weeks. This tree is resistant to many pests but does occasionally has a problem with dogwood borers and scale. It is resistant to Verticillium but may become prey to canker diseases and root rot. Overall it is a very easy tree to care for and worth having for its many seasons of interest.
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文章
Dummer. ゛☀
2017年08月30日
The Emerald ash tree borer (EAB) is an invasive, non native insect discovered in the U.S. during the last decade. Ash borer damage is significant in all species of North American ash trees that become infected. Susceptible trees include white, green and black ash. Know where your ash trees are located and scout for the pest in June and July as the first step to prevent ash borer from causing serious or deadly damage.
Emerald Ash Borer Characteristics
The emerald ash borer is so named for its emerald green color. The insect is about ½ inch long and leaves D-shaped holes when exiting the ash trees interior. The pest lays eggs and leaves the larvae to hatch inside valuable ash trees, where they create serpentine tunnels that interfere with the tree’s ability to move water and nutrients throughout its tissues. Learning how to protect ash trees from ash borer can save your trees.
How To Protect Ash Trees From Ash Borer
Controlling the spread of emerald ash borer begins with keeping ash trees healthy and unstressed. The insect is usually spread through human activities, such as moving infested firewood. Prevent ash borer by inspecting firewood closely before purchasing and buy locally when possible. Do not transport firewood if you live in an area that has an ash borer population. Identifying ash trees is another step to lessen ash borer damage. Insecticidal treatments may slow damage to trees that are valued for shade or historic purposes. Ash tree borer treatment should be applied in May before adult insects emerge.
Ash tree borer treatment is not needed until the emerald ash borer is spotted within a 15 mile radius, unless symptoms are visible on your ash trees. Symptoms include canopy dieback, D-shaped exit holes and bark splitting on your ash trees. If you see what appears to be ash tree borer damage, you may contact a certified arborist about how to protect ash trees from ash borer and what ash tree borer treatment works best in your situation. The tree professional may do systemic injections to kill larvae already inside the tree. Visible emerald ash borer characteristics and damage may be lessened with soil treatments and bark and foliage sprays.
For the homeowner who spots ash borer damage and wishes to do their own ash tree borer treatment, a soil application of imidacloprid can be applied, (such as Bayer Advanced). Most chemicals to control ash borer damage require a pesticide applicator license for purchase.
Emerald Ash Borer Characteristics
The emerald ash borer is so named for its emerald green color. The insect is about ½ inch long and leaves D-shaped holes when exiting the ash trees interior. The pest lays eggs and leaves the larvae to hatch inside valuable ash trees, where they create serpentine tunnels that interfere with the tree’s ability to move water and nutrients throughout its tissues. Learning how to protect ash trees from ash borer can save your trees.
How To Protect Ash Trees From Ash Borer
Controlling the spread of emerald ash borer begins with keeping ash trees healthy and unstressed. The insect is usually spread through human activities, such as moving infested firewood. Prevent ash borer by inspecting firewood closely before purchasing and buy locally when possible. Do not transport firewood if you live in an area that has an ash borer population. Identifying ash trees is another step to lessen ash borer damage. Insecticidal treatments may slow damage to trees that are valued for shade or historic purposes. Ash tree borer treatment should be applied in May before adult insects emerge.
Ash tree borer treatment is not needed until the emerald ash borer is spotted within a 15 mile radius, unless symptoms are visible on your ash trees. Symptoms include canopy dieback, D-shaped exit holes and bark splitting on your ash trees. If you see what appears to be ash tree borer damage, you may contact a certified arborist about how to protect ash trees from ash borer and what ash tree borer treatment works best in your situation. The tree professional may do systemic injections to kill larvae already inside the tree. Visible emerald ash borer characteristics and damage may be lessened with soil treatments and bark and foliage sprays.
For the homeowner who spots ash borer damage and wishes to do their own ash tree borer treatment, a soil application of imidacloprid can be applied, (such as Bayer Advanced). Most chemicals to control ash borer damage require a pesticide applicator license for purchase.
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