#金银花芳香木蠹蛾 相关图片 [图片]分布与危害 金银花芳香木蠹蛾是对金银花危害性很大的蛀干害虫，同时，它还危害杨、柳、榆、苹果、梨、杏等多种林木和果树。 金银花芳香木蠹蛾幼虫成群蛀入茎皮下取食韧皮部和形成层，然后渐入木质部，从上至下穿凿不规则坑道，不但影响植株的生长，严重时可使植株枯死。 形态特征 金银花芳香木蠹蛾成虫体长30-40毫米，翅展70-104毫米，头的前方为淡黄色，胸腹部灰色，腹部肥大而粗。翅灰褐色，前翅翅面上布满许多黑色横纹，似土壤龟裂状。触角雄的栉齿壮，雌的近丝状。 卵近圆形，长1.5毫米，宽1毫米。初产出时近白色，孵化前暗褐色。卵面具14条黑色放射状纵纹。 初孵幼虫粉红色。老熟幼虫体长80-100毫米，背面紫红色，体侧黄褐色，头部黑色有光泽，前胸背板淡黄色，体粗壮略扁平，体表疏生黄褐色短刚毛，并具有蝶形深褐色大斑。 蛹体长50毫米左右，暗褐色，2-6腹节背面具刺2列，前列较粗，后列较细。7-9腹节背面有刺1列，臀部有齿突3对。 茧由老熟幼虫化蛹前吐丝缀土构成，长约50毫米，呈长圆筒形，略弯曲，末端较尖。 发生规律 金银花芳香木蠹蛾每2-3年完成1代。当年小或中龄幼虫在金银花或其他树木茎干内越冬。4月份中龄幼虫向下活动危害，随着气温不断增高，幼虫转向上部扩大危害。9-10月份幼虫接近老熟，即离开被害植株，转移到新植株上钻入木质部进行第二次越冬，第二次越冬的幼虫于春暖后钻入5-6厘米深的土层中做一长形斜立的土窝，吐丝做茧化蛹，蛹期30-45天。5月下旬至6月上旬成虫大量羽化，夜间活动交尾产卵。卵产在植株茎干中下部裂缝处，并分泌黏液把卵粘在一起呈块状。卵经半个月左右的时间孵化，6月下旬至7月上旬为幼虫孵化盛期，刚孵化的幼虫开始群集在孵化处周围，以后随着早龄的增大逐渐分散蛀入木质部危害，9、10月份进入第一次越冬期。 成虫有弱趋光性，羽化时蛹壳带出地面。幼虫受惊后散发一种特有的芳香气味，喜寄生于孤立木或林缘及零星树木上，故散生金银花植株易遭虫害。 防治方法 春季清株整穴时闻有异香，则说明有芳香木蠹蛾幼虫，可人工捉拿。在春季发芽前，在树木周围撒施1%的敌白虫粉剂，每15克，然后培土；或在树干周围撒施辛硫磷，每株50-100克。 5-6月份成虫出土期，用灯光诱杀成虫，减少虫源。

Anacampseros is a genus consisting of a several species of small perennial succulent plants native to South Africa. The botanical name is an ancient one for herbs supposed to restore lost love. All form basal rosettes of smooth or hairy leaves in dense mats and develop a small caudex with age. White filamentous hairs are present along the stems. The wheel-shaped flowers vary from white to purple. The plants are self-fertile and produce seeds in a cup of upright filaments. They are dormant in winter. [图片]Growing Conditions and General Care Anacampseros grow well in partial sun with bright light enhancing the leaf colors and keeping them compact. They require a gritty free-draining soil with added organic material and low to moderate watering. The beautiful caudiciform species are prone to rot and should be watered very sparingly. Feed with a high potassium fertilizer in summer during the growing season diluted to one-fourth potency and mix into the watering can for application. Anacampseros is an excellent plant for container growing. It always looks good and stays small. It look fine in a cold greenhouse and frame. It do well outdoors in raised beds and terraces as well. [图片]Anacampseros crinita Anacampseros may be attractive to a variety of insects, but plants in good condition should be nearly pest-free, particularly if they are grown in a mineral potting-mix, with good exposure and ventilation. Nonetheless, watch carefully for any significant decline in health. This may signal a pest problem that should be dealt with quickly in order to prevent scarring, stunting and even death. [图片]Repotting Repot Anacampseros once a year in order to evaluate the health of the plant and provide a larger growing space being careful not to damage the sensitive roots. [图片]Propagation Anacampseros are easy to propagate either through stem cuttings or seed.

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#大花蕙兰蓟马 相关图片 [图片]分布与危害 主要危害大花蕙兰的花、茎、叶和花朵，尤其喜欢栖息于花心部或花瓣与花萼重叠处，以针状口器刺吸花朵的汁液，使叶片和花朵出现小白点或灰白色斑点。新芽或叶鞘夹层间也容易有幼虫栖息，茎叶部被害后呈黄化枯萎现象，严重影响大花蕙兰的生长发育，降低观赏价值。 形态特征 雌成虫体长约2毫米，暗黑色；若虫浅黄色。 发生规律 其生活周期很短，发生代数较多，可全年发生危害，但以5～10月间最为严重。 防治方法 防治蓟马应着力于消除其寄生环境，如及时剪除不用的花枝、密闭熏蒸、定期喷洒杀虫剂等。 幼虫期喷施国光乙刻（20%氰戊菊酯乳油）2000倍+国光乐克（5.7%甲维盐）3000倍，或国光必治（40%啶虫.毒）1500-2000倍；或国光依它（45%丙溴辛硫磷）1000-1500倍，根据害虫危害情况适当用药2-3次，间隔7-10天。喷药时应注意喷及花内蓟马隐藏处。

#牡丹中华锯花天牛 相关图片 [图片]分布与危害 主要分布在山东、河北、江西、四川等省，也是北方地区危害较重的一种害虫。 为害特点：初孵幼虫先咬食幼嫩根茎表皮，后从近地面断梢伤口腐烂处蛀入，并向根下部蛀害，影响植株的生长发育，降低牡丹的品质。严重时导致植株枯死。 形态特征 成虫 雌成虫体长11-26毫米，雄成虫体长11-20毫米，栗褐色或黄褐色，体具稀疏短黄绒毛。头、胸带褐棕色，鞘翅端部浅黄褐色，头近圆形，上鄂前伸，额唇稍凹陷，复眼大，头部生小刻点，细密。触角11节，基瘤尖明显，柄节粗壮。雄天牛触角较长，前胸背板刻点细密，中间略凹陷，具2个圆形瘤突，两侧缘各生小齿突1个。鞘翅较前胸宽，翅面上也生细密的点刻，端部不明显。足长。 卵 长1.5毫米，长椭圆形，浅黄至浅黄绿色。 蛹 乳白色至黄色。 发生规律 中华锯花天牛3年1代。在土壤中生存，经历卵、幼虫、蛹、成虫4个发育阶段，3月下旬老龄幼虫从根部隧道中爬出，作土室化蛹，4月初进入入土盛期；4月下旬-5月上旬进入化蛹盛期，蛹期15—20天；成虫一般5月下旬出土，当天交尾产卵，卵期10天左右，将卵散产于近表土3cm处，6月下旬进入孵化盛期。为害时不易发现，造成植株衰弱或死亡。只有成虫才爬出地面交配产卵。成虫在夜间活动，产卵后即死亡。越老的牡丹植株受害越重。 防治方法 （1）天牛化蛹盛期进行中耕，破坏土室灭蛹。 （2）保护和利用其天敌。 （3）在牡丹根际打孔3-4回孔，深约20cm，每孔投放入磷化铝一片，或将带有虫害的苗木放在密闭的室内用磷化铝熏杀，均有好的效果。 （4）化学防治 在成虫出土盛期即5月下旬可用向树干喷洒40％国光必治乳油800倍液、国光依它（45%丙溴辛硫磷）800-1000倍液，5天1次，连喷2-3次即可。在卵孵化盛期浇灌50％辛硫磷乳油或40％甲基异柳磷乳油1500倍液、48％乐斯本乳油1300倍液。

Echeveria ‘Doris Taylor’, also known as Woolly Rose, is an attractive succulent that forms rosettes of pale-green, fleshy leaves covered with small white hairs. A low-maintenance succulent, the woolly rose can easily thrive if provided with the right conditions. Often grown outside in warm, arid regions, the Woolly Rose is best suited to U.S. Department of Agriculture plant hardiness zones 9b to 11; it should be brought inside during the winter if grown in colder climates. [图片]Growing Conditions and General Care Place the Woolly Rose where it will receive full morning sun or partially shaded afternoon sunlight. If the it is in a pot, place it out on the balcony or porch during warm, sunny weather. Give the Woolly Rose at least a foot (30 cm) of space on each side to prevent it from being crowded by other plants. Water whenever the soil feels dry during the growing season. Water lightly until the soil is moist but not very wet. Woolly Rose can go for a long period without water once they are established, but they grow better and faster if they receive regular watering during the growing season. Reduce watering during the winter, allowing the soil to dry thoroughly between waterings. Fertilize Woolly Rose with liquid 2-7-7 succulent and cactus fertilizer during the growing season, from spring to late summer. Add seven drops of the fertilizer to 1 quart of water and sprinkle around the base of the succulent. Fertilize once every two weeks. Woolly Rose will drop many of its lower leaves during the winter. Remove shriveled and fallen leaves as they accumulate around the base of the plant. Discard the leaves before they begin to rot. Decaying leaves can spread disease to the rest of the plant if not removed. [图片]Repotting Repot Woolly Rose plants once roots become visible around drainage holes. Repot into a pot 1 inch (2.5 cm) wider and deeper or out into the garden. Woolly Rose prefer very well-draining soil. [图片]Propagation Propagate Woolly Rose plants by taking cuttings during the growing season. Cut off a branch and allow it to dry for 24 hours in a warm location with indirect light. Plant the cutting in moist potting soil and place in indirect sunlight or where it will receive direct morning sun. Keep soil moist but not wet. Roots should appear within a few weeks after planting.

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If you’re looking to decorate your home or office with gorgeous yet low maintenance plants, succulents may be the best choice for you. Their resilient nature often makes them the best choice for people just beginning to tap into their green thumb or those who have little time to tend to their plants. While it’s true that succulents require less watering, unless you are prepared to learn how to take care of these types of plants properly, you could wind up accidently killing them. So let’s dig into the basics to jump start your future horticulture hobby. [图片]1. Watering Watering is arguably the most important aspect to focus on when growing succulents because it is one of the fastest ways to accidently kill them. Succulents are prone to root rot, which is caused by damp roots. For this reason, succulents’ soil should only be soaked temporarily when you water them, and watering is only necessary when the soil is completely dry. This is important to note because other plants tend to require water more often and sometimes even require their soil to be moist constantly. Mixing up the requirements could kill your succulents. [图片]2. Light Succulents need a lot of sunlight each day, with the minimum recommendation being three hours of direct sunlight. When indoors, find the window with the most sunlight and put your succulents there in order to promote healthy growth. The key is to keep these plants out of the shade, whether they’re inside or outside, unless you are in an extremely hot climate. Succulents in harsher, hotter conditions benefit from shade during peak sun hours, which can be counterintuitive because of the stereotypes developed by the portrayal of cactuses (most of which are succulents) in Western films you may have seen. Succulents are actually very durable and are able to survive in a variety of temperatures due to their resilient nature. They can survive in temperatures as low as 35 degrees Fahrenheit (2 degrees Celsius) overnight! [图片]3. Soil The ability of succulents to keep hydrated is one trait most professional athletes should revere. This means that they prefer soil that drains easily. When planting succulents outside, make sure you plant them in areas where the ground doesn’t tend to stay moist or hold water, as this type of location could drown your succulents and cause root rot. If you’re planning on keeping your plants in pots, ensure that there are plenty of drainage holes in the bottom of the pots before adding soil, especially if you choose to keep the plants inside. This will help prevent overwatering. [图片]Types of soil that are best for succulents consist of gravel, volcanic rock, cactus soil, and other similar soils. There are many succulent-specific soil mixes available, too. As with all gardening, watching your plants and noticing changes, like drooping leaves, can help you understand what each plant needs. Every plant is different, and despite general guidelines for care, they require individual attention to make sure they grow into healthy, flourishing succulents.

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Succulents generally bloom in colder weather. Therefore, they provide color when the rest of your garden has shed its hues. These are the most popular flowering succulents: [图片]Crown of Thorns (Euphorbia milii): The branches of this succulent plant look like thin, spindly cactus. At the ends of the branches are groupings of oval leaves. Red clusters of flowers form within these bunches. Crown of Thorns can bloom throughout the year if it has adequate sunlight. When it’s blooming, water this one more frequently than your other succulents. When there are no flowers visible, let the top layer of soil dry out in between watering. If it gets too dry, it will lose its leaves. However, they will grow back once the plant becomes hydrated again.[图片]Christmas Cactus (Schlumbergera x buckleyi): Christmas Cactus can work well as a hanging plant. As it grows, the leaves and flowers trail downward. This plant tends to flower in temperatures below 55 degrees Fahrenheit (13 degrees Celsius). If you keep it outside, it will begin to flower in the winter. The Christmas Cactus doesn’t like a lot of water. It prefers drier soil, especially in the winter.

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Even though petite, glass-enclosed gardens are fashionable, succulents don’t grow well in terrariums. Terrariums can become too humid for succulents. When these plants are exposed to too much moisture, they can become mushy and die. Below are some tips for making the most of a terrarium garden. [图片]Choose a terrarium with ample circulation and plenty of drainage. Your plants won’t thrive if they’re soggy. Don’t overcrowd the area. Less is more when it comes to growing succulents in terrariums. The roots of the succulents should be completely covered by the soil. You won’t have to water the plants often. When you do, spray the dirt with a mister. Tiny versions of succulents look great next to miniature accessories.[图片]Kids love to plant, arrange and care for fairy gardens. You won’t have to worry about them damaging these sturdy plants. Make sure that choose soft plants that won’t pinch or poke the children.

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Succulents with a trailing habit are best planted where they can hang vertically. If they’re placed on a flat surface, the leaves may become damaged when they come in contact with it.[图片]However, you’re not limited to planting them in hanging baskets. You can plant hanging succulents in window boxes, where they can create a cascading design along the exterior of your home.[图片]Hanging succulents grow well out of rock walls or hanging over arbors and trellises. You can even plant them in cracks in your landscape stones.

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Don’t assume that you’re limited to growing succulents in traditional flower pots. Because they’re so flexible, they can be grown in just about any container. We’ve even seen succulents planted in a shoe. Below are some options for unique potted succulent ideas. [图片]Hollow out some logs or stumps and fill them with soil. Plant the succulents inside for an inexpensive, natural look. An old birdbath or fountain makes a wonderful home for these plants. So do old watering cans. Because succulents don’t require ample amounts of water, you can plant them into furniture. Remove the center slat of a farmhouse table and replace it with a succulent garden. Grow succulents along the center of your coffee table. Smaller containers make your succulent garden portable. Use it as the centerpiece one night at dinner, then move it to your foyer to greet you with freshness when you enter the house.[图片]

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