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Miss Chen
2018年09月06日
Miss Chen
虫害分布 我国分布于浙江、福建、江西、湖南、四川、贵州、广西等地。
虫害危害 为害毛竹、慈竹、白夹竹、寿竹等竹林，是竹林重要食叶害虫之一。 取食竹叶，大发生时将竹叶食尽，使竹节内积水，致被害竹林成片枯死。 虫害形态特征 成虫 体长10-14mm，翅展26-35mm。体黄色，雌虫体色略浅。复眼黑色。触角栉齿状，触角干淡黄色，栉齿灰黑色，雌虫栉齿短而稀。雄虫前翅淡黄至棕黄色，雌虫前翅浅黄色，翅后缘中央有1橙红色斑，后翅色浅。 卵 鼓形，高0.8mm。浅黄色，顶部稍平，中间略凹，顶缘有1浅褐不均匀环纹。 幼虫 老熟幼虫体长20-25mm，浅灰黑色，被黑色和黄色长毛。前胸两侧中央具突出毛瘤，各生1束向前伸的灰黑色羽状毛，长约10mm；第一至第四腹节背面中央各生1束红棕色刷状毛；第八腹节背面中央着生1束红棕的长毛，毛束内混有羽状毛。 蛹 体长9-14mm，黄棕或红棕色，体各节被黄白色毛，臀棘上有小钩30余根，共成1束。茧长椭圆形，长11-23mm，丝质薄，土黄色，茧上附有毒毛。 虫害发生规律 年生代数因地而异，在浙江、福建1年3代；江西、四川1年4代。以幼虫在茧内越冬或以1-2龄幼虫在竹上越冬。在浙江南部各代幼虫取食期分别为3月中旬到6月上旬、6月下旬到8月上旬、8月中旬到10月上旬；福建省各代发生期分别比浙江提前10-15d。江西省4代，各代幼虫取食期分别为3月中旬到5月上旬、5月下旬到6月下旬、7月上旬到8月上旬、8月下旬到10月上旬。11月孵化的幼虫需取食10-25d后进行越冬。 成虫在清晨和傍晚羽化。羽化后爬到竹枝叶丛中，白天静伏，受惊扰后落地或作短距离飞行，夜晚飞行活动，有强趋光性，尤以雌虫更甚。雌虫羽化后不久，雄虫即可飞来交尾，交尾时间多在清晨。雌虫交尾后4-12h开始产卵。卵多产在被害较轻或未被为害竹叶丰茂的竹冠中下层竹叶背面或竹秆上。卵块单行或双行纵列，每行有卵6-13粒，多者达40余粒，排列紧密。每雌1生产卵120-160粒。 卵经6-12d孵化。初孵幼虫出壳后，停息于卵块附近，8-20 h内取食卵壳，然后群集爬行于竹叶背面取食。3龄幼虫开始分散，食叶量逐龄渐增，并爬上竹梢叶部取食。幼虫有吐丝下垂习性，尤以小幼虫更甚，以此转移取食。幼虫善爬行，反应敏感，有假死性，遇惊卷曲身体，弹跳坠地。夏天中午气温高时，幼虫需下竹纳凉，下午夕阳西下后复上竹取食。老熟幼虫在竹上部竹叶或竹秆上结茧，夏天老熟幼虫可下竹在林下灌木、杂草及竹秆下部的笋箨内结茧。茧经2-3d化蛹。蛹经6-15d羽化为成虫。 刚竹毒蛾的发生与温、湿度关系密切。一般大出现前多发生在山洼、阴坡、密林中，再逐渐向山脊、阳坡、疏林扩展。同一被害竹林，山洼、溪边、密林被害重；山脊、阳坡被害轻。虫情发展到山脊、阳坡后，虫口密度将急剧下降。幼虫在气温12℃以下，30℃以上取食减少；10℃以下，35℃以上停止取食。春天低温、夏日高温对竹毒蛾发生不利，秋天干旱对卵孵化及幼虫发育不利。早春气温回升后，再出现低温，俗称“倒春寒”，最低气温在0℃以下，刚竹毒蛾当年不会大发生。 捕食天敌有蚂蚁、猎蝽。寄生性天敌卵期有毒蛾黑卵蜂、旋小蜂、跳小蜂；幼虫期有绒茧蜂、黑瘤姬蜂、细鄂姬蜂、凹眼姬蜂、内茧蜂及日本追寄蝇、灰腹狭颊寄蝇等。另外幼虫期还有白僵菌寄生。天敌在大发生时寄生率都很高，对抑制该毒蛾持续发生起决定作用。
虫害防治方法 （1）农业防治。 加强竹林抚育，合理砍伐，保持竹林适宜密度，可抑制大发生；注意竹林卫生，清除落地叶片及小枝，人工摘除虫茧，减少虫源。 （2）物理防治。 该虫趋光性强，在成虫发生期，装置黑光灯诱杀。 （3）化学防治。 尽量选择在低龄幼虫期防治。此时虫口密度小，危害小，且虫的抗药性相对较弱。防治时用45%丙溴辛硫磷（国光依它）1000倍液，或国光乙刻（20%氰戊菊酯）1500倍液+乐克（5.7%甲维盐）2000倍混合液,40%啶虫.毒（必治）1500-2000倍液喷杀幼虫，可连用1-2次，间隔7-10天。可轮换用药，以延缓抗性的产生。 （4）生物防治。 幼虫发生期引放天敌，并注意加以保护，发生量不大时尽量不施用化学药剂防治，可使用白僵菌、苏云金杆菌喷雾，防治效果均好。
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Miss Chen
2018年09月06日
Miss Chen
虫害分布 别名竹扁蠹虫、竹褐粉蠹，国内分布广泛，食性杂，可以为害竹材、栎类、泡桐等枯立木，以及木器、家俱、竹制品。
虫害危害 幼虫在竹材、木材内部蛀食，咬成细的粉末，散落地面。材质内部蛀成碎屑仅留表皮，一触即破，给家庭造成经济损失。 虫害形态特征 成虫 体长4-5mm，长扁形，红棕色或黄褐色。头部及前胸背板密被金黄色细毛，复眼黑色而略突出。触角11节，末端2节膨大，端节为卵圆形。前胸背板后端的2/3及鞘翅缝区为黑褐色，前胸背板近长方形，前端宽而后端狭，背面微有刻点。鞘翅较长，光滑无毛，上有6条纵列的微细点刻，两侧近于平行，末端略圆形。腹部共6节，第1腹节比第2腹节约长1倍以上。 卵 长1.2-1.4mm，乳白色。 幼虫 前端略微弯曲，呈锥棒状，老熟幼虫体长3.5－6.4mm。 虫害发生规律 1年发生1代，成虫喜在竹材裂缝及阴暗处隐藏，羽化不久即行交配，每次时间很短，交尾可进行多次。产卵时先以产卵器刺入竹材断头处的小孔中，作多次尝试活动，然后将卵产出。幼虫孵化后，咬破导管壁蛀入竹材中危害。成虫一般夜间活动，能飞翔。幼虫的生长情况，与竹材中所含淀粉及葡萄糖有很密切的关系，如竹材经6小时的水煮，由于其中淀粉和单糖类等物质已被浸出，营养不够，幼虫个体的生长发育将受到显著的影响。老熟幼虫在竹材表面筑蛹室化蛹。以幼虫越冬。各虫态历期为：卵平均10天，幼虫323天，前蛹4天，蛹8天，成虫期16天。
虫害防治方法 （1）加强竹林管理。 加强营林措施，增施磷钾肥，适时合理灌溉，防止竹株徒长，提高植株抗性，减少为害。 （2）新伐材处理。 新伐竹材放入石灰水中浸泡一段时间后再利用，并且尽量采用水运，可避免和减轻为害；将受害后不堪使用的竹材、竹制品及时烧毁，在竹材断口处用漆或石蜡封闭，可阻止其产卵。 （3）药剂防治。 发现竹材、木材受害时，可用国光必治200倍或敌敌畏200倍液涂抹或喷洒。杀死其中幼虫或成虫。
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Miss Chen
2018年09月06日
Miss Chen
The bird of paradise plant (Strelitzia reginae) is a tropical favorite known for its flamboyant birdlike blooms. A South African native, the plant is hardy in U.S. Department of Agriculture plant hardiness zones 10 through 12. Throughout the rest of the United States, it enjoys widespread popularity as a dependable houseplant. Bird of paradise grows 3 to 5 feet in height and blooms intermittently through the year, creating a colorful focal point in warm-climate gardens.
Grow bird of paradise plants in well-drained, fertile soil in a sunny or partially sunny location. In warm climates, the plant grows and flowers best in partial shade. In sunny locations, bird of paradise grows shorter stems and produces smaller flowers.
Protect bird of paradise plants any time temperatures drop toward freezing. It can survive 30 degree Fahrenheit temperatures, but only for a brief time. In colder climates, grow bird of paradise in a large pot that can be moved inside during cold snaps and wintry weather.
Water bird of paradise consistently, especially when newly planted. New plantings need water every three days for the first six months until they get established. After that, the plant should thrive with normal rainfall and supplemental watering in dry conditions.
Place a layer of mulch around the base of the bird of paradise to conserve moisture and prevent competition from grass and weeds. Keep the mulch a few inches away from the plant's trunk to prevent moisture from accumulating and encouraging rot.
Fertilize bird of paradise every three months during its active growing season of spring and summer. Apply a controlled-release, balanced 14-14-14 fertilizer at a rate of 3 tablespoons per 4 square feet around the plant. Scratch the fertilizer into the soil with a garden fork, and water the area well.
Use insecticides sparingly as bird of paradise plants have few pests. If aphids or grasshoppers are noticed, remove them by hand or use a gentle blast from a hose to remove them. Remove any yellowed or dead leaves that occur through the year.
Divide large clumps of bird of paradise by separating the root ball early in the growth season. Use a garden fork to gently lift the plant and to pull the root ball apart. Plant divisions at the same depth the original grew. Keep them well watered until established.
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Miss Chen
2018年09月06日
Miss Chen
Hens and chicks plant (Sempervivum tectorum) is named for the rosette, or hen, and small offsets, or chicks, that grow on slender runners extending from the succulent. This sturdy plant thrives in tough growing conditions and needs only a thin layer of soil to develop roots. After the hen flowers and sets seed in summer, it dies back and the chicks fill in the empty spot. Hens and chicks grows outdoors in U.S. Department of Agriculture plant hardiness zones 3 through 8. Sometimes called houseleek, you can also grow hens and chicks as a houseplant.
Outdoor Care Like most succulents, hens and chicks thrive in poor, sandy, well-draining soil and full sun. A spot where the plant gets afternoon shade is best in hot, sunny climates, but too much shade may result in a spindly, pale plant. To plant hens and chicks, loosen the top of the soil with a spade or garden fork, then nestle the plant into the top of the soil. It will soon develop roots that anchor the plant to the soil. Water to a depth of 6 to 8 inches after planting. After that, water only when the soil is dry -- usually every seven to 10 day during hot weather. The plant doesn't need any fertilizer. To keep hens and chicks neat, pinch off flower heads after the plant blooms in midsummer. Houseplant Hens and Chicks Hens and chicks performs best and shows its best colors outdoors, but with proper care and a container with drainage holes, you can grow this succulent plant indoors. Plant hens and chicks in a container filled with a mixture of equal parts potting mix and sand, then place the plant in a south-facing window where it gets at least six to eight hours of sun each day. If you don't have a sunny window, place the plant under grow lights or fluorescent bulbs for 14 to 16 hours per day. Allow 6 to 12 inches between the plant and the bulb. Proper watering is critical because succulent plants rot quickly in soggy, waterlogged soil. One watering per week is generally enough during warm weather, but never water the plant unless the soil feels completely dry. Water sparingly during the winter, providing only enough water to keep the plant from shriveling. Let the pot drain thoroughly and never let the plant stand in water. Making More Hens and Chicks Hens and chicks is easy to propagate by removing chicks from the hen any time or year. This usually happens because the plant outgrows its garden spot or container or because the hens and chicks are too crowded. Allow the chick to develop until the runner dies back and you can see small roots at the base of the chick. Cut or break the chick from the hen and plant it in a pot filled with a sandy potting soil mix, or in well-drained outdoor spot. To keep from transferring disease to the plant while pruning, wipe the blades of your tools with alcohol and allow to dry before using.
Considerations Although hens and chicks can spread up to 2 feet wide, they are not considered an invasive plant. Hens and chicks are generally disease-free with the exception of root or stem rot or rust, which occur if hens and chicks are overwatered or placed in soil that doesn't drain well.
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Miss Chen
2018年09月06日
Miss Chen
A plant for pond edges, bog gardens and other wet sites, horsetail (Equisetum hyemale) grows in stands of bamboo-like, dark green stems. Also called scouring rush, horsetail is hardy in U.S. Department of Agriculture plant hardiness zones 3 through 11, and is a member of an ancient plant family that dates back 350 million years, notes the Missouri Botanical Garden. One reason for this perennial's long survival is its extremely aggressive spreading habit, but growing horsetail in containers gives you some control. Containing Horsetail
Horsetail spreads outward through underground stems called rhizomes, and containers provide a barrier to these rhizomes. Plant horsetail in a container, with drainage holes, that's just large enough to accommodate the plant's root ball. Place a sheet of fine mesh, such as screen mesh, over the drainage holes to prevent horsetail rhizomes from growing through them, and spread a layer of general purpose potting soil over the mesh. Place the horsetail in the container. The top of the root ball should be 1 inch below the container rim. Fill in gaps around the root ball with more potting soil, and apply water until it runs though the drainage holes. Planting in Water
Horsetail thrives in water gardens and on stream banks. Providing year-round color and structure in wet, full-sun and partial-shade sites, horsetail tolerates water to a depth of 4 inches over its roots. To add horsetail to your water garden or pond site, spread a 1-inch layer of gravel over the potting soil in the horsetail container to protect it. Place bricks on the bottom of the planting site to provide a firm, level base. Sink the horsetail container into the water slowly until it's submerged and resting firmly on the bricks. Planting in Soil
Horsetail provides strong, vertical lines in Japanese gardens and can grow where few other plants survive. Dig a hole 2 or 3 inches wider than the horsetail container and 1 inch less deep. Place the container in the hole, and check that it's level. Twisting the container and pushing down gently helps level the container and firm the soil beneath it. Check that the container rim is protruding from the soil by 1 inch, and fill in the gaps around it with dug soil. Water the ground around the container to settle the soil, and fill in any hollows with more soil. Controlling Horsetail
Prune regularly to control horsetail's spreading habit. Horsetail grows 2 to 4 feet tall and spreads indefinitely in favorable conditions. Check the horsetail monthly, at least, for rhizomes climbing over the container rim and stems with cone-like, spore-producing heads, which usually appear in spring. Clean pruning shear blades with rubbing alcohol, and prune escaping rhizomes and fruiting stems at ground level. Wipe the pruning shear blades with rubbing alcohol again after use. Place pruned horsetail debris in a sealed plastic bag in the trash. Don't grow horsetail in areas accessible to pets or livestock. Horsetail can be deadly to animals when eaten.
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Miss Chen
2018年09月06日
Miss Chen
With their 2- to 5-feet-tall spikes and their bell-shaped, 2- to 3-inch flowers that have spotted throats and range in color from yellow and white to pink or purple, common foxgloves (Digitalis purpurea) are easily identifiable in the garden. These European natives are deer- and rabbit-resistant and attract hummingbirds. Hardy in U.S. Department of Agriculture plant hardiness zones 4 through 8, foxgloves prefer well-drained soil in a sunny to partially shady area of the garden. With proper care, they grow oblong, light-green foliage in their first year and bloom the next year.
Step 1 Water foxgloves immediately after planting them, thoroughly soaking the soil around the plants. Keep the soil somewhat wet initially, watering about three times during the first week. Provide 1 inch of water each week afterward, maintaining consistently moist, but not wet, soil and adjusting your watering frequency after rainfall. Water foxgloves in early morning, and avoid getting their leaves wet to prevent diseases. Step 2 Dig a 1-inch-deep trench in a 3-inch diameter around each foxglove plant. Sprinkle one handful of 5-10-5 granular fertilizer in each trench. Fill the trenches with soil, and water the soil. Do this in early spring and again six and 12 weeks afterward. Alternatively, apply a 1- to 2-inch-thick layer of compost around the foxgloves each spring to provide nutrients. Step 3 Spread a 2-inch-thick layer of organic mulch, such as shredded leaves or bark chips, on the soil around the foxgloves. Keep the mulch about 1 to 2 inches away from the plants. Mulch promotes soil moisture retention and keeps weeds at bay. Step 4 Treat and prevent powdery mildew outbreaks by properly spacing plants to allow proper air circulation, water from below and not overhead, clean up leaf debris below foxgloves and prune off affected foliage. Spray severe infections with ready-to-use Neem oil or horticultural oil, saturating the plant's foliage and repeating weekly or as needed. Do not use oil-based products when temperatures are above 90 degrees Fahrenheit or the plant is stressed from drought.
Step 5 Remove slugs or snails from the foxglove's foliage in the early morning when the pests are most active. Wear gloves and pick the pest from the plant, placing them in a small bowl of soapy water. Prune off any foliage damaged by the snails or slugs. Step 6 Pinch off the foxgloves' wilted or faded flowers. Doing so keeps the plants looking neat and prevents them from spending energy on making seeds. Alternatively, wait until two-thirds of the flowers have faded, and then use pruning shears to cut back each entire stalk at the point where its base meets the bottom leaves.
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Miss Chen
2018年09月06日
Miss Chen
Winter-blooming clivia (Clivia miniata) flowers in winter and early spring. The clusters of yellow and orange blossoms are surrounded by strappy green leaves. Clivia grows outdoors in U.S. Department of Agriculture plant hardiness zones 9 through 11, but it can grow as a houseplant anywhere with proper care.
Pick a Spot Whether you grow clivia outdoors in the garden, or indoors in a pot, provide the plant with partial shade. Outdoor beds with dappled sunlight work well, while indoors you can set them in an area with bright but indirect sunlight. Clivia is prone to root rot in wet soil, so grow them in well-draining beds or use pots with bottom drainage holes. Temperatures below 32 degrees Fahrenheit kill the plant, so bring outdoor potted plants indoors before a freeze and don't allow the foliage to touch a window during cold weather. Watering Wisely How much water a clivia needs depends on the season. During spring and summer, water the soil when the top 1 inch feels completely dry. When watering a potted plant, allow the excess to drain from the bottom drainage in the pot and empty the drip tray afterward. Withhold water from late fall through midwinter if you want the plant to flower, because clivia only flowers in response to drought stress. During this dry rest period, keep the temperature below 60 F to further encourage blooms. Resume regular watering and increase temperatures when the flower stalk is about 6 inches tall. Feeding Tips Light fertilizer encourages healthy growth, whether the clivia is grown indoors or outside. Fertilize once a week in spring and summer. Dilute 1/2 teaspoon of 15-15-15 fertilizer in 1 gallon of water, and use the mixture water for one regular watering each week. Clivia doesn't need fertilizer during its dormant period in fall and winter. Pruning Needs Clivia doesn't require any regular pruning, but you can trim off dead or badly damaged leaves to improve the plant's appearance. Gently pull off the leaves or trim them off with shears wiped with a rubbing alcohol-soaked cloth. Potted clivia also rarely needs repotting and grows best when root bound. If the roots completely fill the pot, which happens about every three or four years, transplant it in spring to a new pot one size larger than the old one. The new pot must have bottom drainage holes. Plant the clivia at the same depth it was growing previously, and handle the roots gently to avoid damage.
Controlling Pests Diseases rarely affect clivia, with the exception of root rot in overly wet soil. Indoors, aphids and mites may feed on the foliage, but you can rinse these off with a strong stream of water. Slugs and snails may feast on clivia foliage outdoors. Pick these off by hand and drop them into a bucket of soapy water.
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Miss Chen
2018年09月05日
Miss Chen
虫害分布 全国各地都有分布。
虫害危害 主要危害碧桃、山桃、梅、李、杏等。 虫害形态特征 无翅胎生雌蚜体绿色，体表覆白色粉，尾片长而大。有翅胎生雌蚜头、胸部土黄色，胸背有黑瘤，腹部绿色。若蚜与无翅成蚜相似，体较小，淡黄绿色，体上有一层白粉。 虫害发生规律 一年发生10余代，以卵在枝条或芽缝等处越冬。京津地区约3月中旬越冬卵孵化，先群集于新叶为害，后扩散到整株叶片。4月中旬至5月中旬为繁殖高峰，6月迁移至其他植物上，9月又迁回，11月下旬产卵越冬。
虫害防治方法 1. 蚜虫繁殖快，世代多，用药易产生抗性。选药时建议用复配药剂或轮换用药，可用50%啶虫咪水分散粒剂（国光崇刻）3000倍液，10%吡虫啉可湿性粉剂（如国光毙克）1000倍液，40%啶虫.毒乳油（如国光必治）1500-2000倍液，或啶虫咪水分散粒剂（国光崇刻）3000倍液+5.7%甲维盐乳油（国光乐克）2000倍混合液喷雾均可针对性防治 ，防治时建议在常规用药基础上缩短用药间隔期，连用2-3次。 2.虫量或早春寄主植物发芽前剪除有卵枝条。 3、利用黄色粘胶板诱粘有翅蚜虫。 4、注意保护天敌（瓢虫、草蛉、食蚜蝇、蚜茧蜂、蚜小蜂）等。
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Miss Chen
2018年09月05日
Miss Chen
虫害分布 西南、华中、华东、华北，辽宁(大连)。
虫害危害 主要危害栗树。 虫害形态特征 成虫雌体扁圆球形，年轻时绿色，触角6节，死体坚硬、蜡质，有光泽，黄褐色，宽径 4.5-6.5mm，背具黑色横纹5-7条，前3条较宽，腹面与臀部具白色絮状物。雄体长1.7mm，翅展 3.5mm，棕褐色，触角丝状，6节，尾端交配器锥状，露出体外，两侧具细蜡丝各1根。卵长椭圆形， 淡橙红色。若虫1龄时扁椭圆形，长约O.5mm，淡 红褐色，触角6节，与足均为淡桶黄色; 2龄雌体 纺锤形，背凸，暗红褐色，被蜡毛，触角6节; 2龄雄体卵圆形，黄褐色，触角7节; 3龄雌体卵圆形，红褐色。蛹圆锥形，黄褐色。茧扁椭圆形，长约2mm，白色絮状。 虫害发生规律 一年发生1代，以2龄若虫在枝条芽基或伤疤处越冬。在浙江，3月初越冬雄若虫爬行至皮缝、伤口等隐蔽处聚集结茧化蛹，雌若虫在原处固定取食进入3龄。3月下旬成虫开始羽化，交尾后于5月初产卵，每雌产卵2000余粒，5月上、中旬孵化，5月下旬进入2龄若虫期，并以此越夏和越冬。老树重于幼树，下层枝重于上层枝。若虫死亡率较高。
虫害防治方法 （1）冬季植株修剪以及清园，消灭在枯枝落叶杂草与表土中越冬的虫源。 （2）提前预防，开春后喷施40%啶虫.毒（国光必治）乳油2000-3000倍液进行预防，杀死虫卵，减少孵化虫量 （3）蚧壳虫化学防治小窍门： ①抓住最佳用药时间：在若虫孵化盛期用药，此时蜡质层未形成或刚形成，对药物比较敏感,用量少、效果好; ②选择对症药剂：刺吸式口器，应选内吸性药剂，背覆厚厚蚧壳（铠甲），应选用渗透性强的药剂如40%啶虫.毒（国光必治）1500-2000倍液喷雾防治，或用国光必治1500-2000倍+5.7% 甲维盐乳油（ 国光乐克）2000倍混合液防治效果更佳。建议连用2次，间隔7-10天。 ③选择适宜的用药方式： 针对低矮容易喷施的，可以用喷雾方式防治；针对高大树体的蚧壳虫防治，也可使用吊注“必治”或者插“树体杀虫剂”插瓶的方式防治，用量根据树种、树势、气候等因素而调整。 (4)生物防治：保护和利用天敌昆虫，例如：红点唇瓢虫，其成虫、幼虫均可捕食此蚧的卵、若虫、蛹和成虫；6月份后捕食率可高达78％。此外，还有寄生蝇和捕食螨等。
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Miss Chen
2018年09月05日
Miss Chen
虫害分布 分布于黑龙江、吉林、辽宁、内蒙古、北京、安徽、台湾、广东、陕西、四川等地。寄主是苹果、山楂、核桃、柞等。
虫害形态特征 成虫体长8-15mm，体宽3-6mm。体黑色，全身被灰色短绒毛，并杂有许多火黄色或金黄色毛斑。前胸背板中央具丝绒般的斑纹4个，每边两个，前后各1，排成直行，前斑长形，后斑较短，近乎卵圆形，两者之间的距离超过后斑的长度；每个黑斑的左右两边都镶有相当宽的火金或金黄色毛斑。鞘翅饰有许多黄色和黑色的斑点，每翅中端的灰色毛较淡，在此淡色区的上缘和下缘中央，各有一个较大的不规则形的黑斑，其他较小的黑斑大致圆形，分布于基部之上，基部中央则极少或缺如；黄斑形状各异，分布全翅。小盾片中央火黄或金黄色，两翅较深。鞘翅沿小盾片周围的毛大致淡色。触角部分赤褐色，第1节背面杂有金黄色毛，第3节起每节基部近1/2为灰白色，各节下缘密生灰白及棕色缨毛。体腹面及足亦有灰白色长毛。体卵形。头部静止时与前足基部接触；额极宽；复眼很小，分成上下两叶，期间仅有一线相连，下叶较大，但长度只及颊长之半；头面布有刻点及颗粒。雄虫触角超出体长1/3，雌虫与体等长，柄节端疤有时不大显著，开放式。前胸背板具刻点及小颗粒，表面不平坦，中央后方及两侧有瘤状突起，侧面近前缘处有一瘤突。鞘翅基部1/4具颗粒。 虫害发生规律 黑龙江2年1代，以幼虫或成虫越冬。翌春5月初越冬成虫开始活动取食并交配产卵。卵多产在树皮缝、枝节、死节处，尤喜产在腐朽变软的树皮上，卵期15天。5月底孵公，初孵幼虫蛀入皮层至皮下于韧皮部与木质部之间蛀食。秋后于蛀道内越冬。第2年为在至7月底前后开始老熟于隧道内化蛹，蛹期10余天，羽化后咬圆形羽化孔出树，于落叶层和干基各种缝隙内越冬。
虫害防治方法 主要的措施包括选育抗性树种，加强林地水肥管理，保证林木生长健旺，营造各种混交林，保护和招引啄木鸟及其他天敌，及时清除虫害木，避免天牛的大量发生等。局部发生时,须及时采取措施加以控制,如立即清除严重被害木，就地剥皮，置阳光下曝晒数周后利用。 虫害药剂防治 （1）涂白。秋、冬季至成虫产卵前，国光糊涂（树干涂白粉剂）与水按1:1比例混配好，加入200倍国光必治涂于树干基部（2米以内），防止产卵，可加入多菌灵、甲基托布津等药剂防腐烂，做到有虫治虫，无虫防病。同时，还可以起到防寒、防日灼的效果。 （2） 喷药防治。成虫发生期，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，或者国光Bt、国光苏松质病毒等杀灭成虫。 （3）虫孔注药。幼虫危害期（6-8月），用小型喷雾器从虫道注入国光防蛀液剂，也可浸药棉塞孔，然后用粘泥或塑料袋堵注虫孔。 （4）熏蒸防治。磷化铝片是良好的熏蒸杀虫剂，可用该药堵孔，黄土封口，杀死幼虫。每孔放1／20片(3克／片)。或薄膜封干后，往薄膜内放药片熏蒸。
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