| 摘要: |
| 草履蚧（Drosicha corpulenta(Kuwana))在陕西关中1年发生1代，以卵越冬，越冬卵于12月中下旬到翌年1月上旬孵化。1月中下旬到2月上中旬初孵若虫开始出土上树，5月中下旬至6月初开始下树产卵，卵集中于距树干40 cm的土层中。若虫在树冠上层最多，中层次之，下层最少。1年生枝段最多，2年生枝段次之，3年以上生枝段最少。采用机油加羊毛脂5：1（质量比）在初孵若虫上树前的1月上旬至2月上旬进行涂环阻隔防治和保护利用红环瓢虫防治效果较好。 |
| 关键词: 草履蚧 生物学特性 发生规律 |
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| 基金项目:西安市林业科学技术项目(9701) |
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| Biological characteristics of Drosicha corpulenta (Kuwana) and its occuring laws |
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| Abstract: |
| Drosicha corpulenta occurs one generation a year in the middle of Shanxi Province,and overwinters by means of eggs.Egg hatches from the middle and late December to the early January of next year.The early-hatching nymph starts to scramble the host-poplars from the litters during the middle and late January to the early and middle February,the female-adult oviposits under the host-tree during the middle and late May to the early June.The eggs is mainly distributed in the layer around the trunk from the surface to the depth of 60cm under ground.The nymph is mainly in superstratum of crown,the next is the biggest,the amount in two-year-old branch is middle,the amount in three-year-old branch is the smallest.Effective control measures are separating-control by means of daubing a mixture of 5∶1 diesel oil to lanolin on the bottom of tree truck,and biological control by using predatory enemy,Rodolia limbata (Coleoptera∶Coccinellidae),before the early-hatching nymph scrambles the tree,during the early January to the early February. |
| Key words: Drosicha corpulenta (Kuwana) biological characteristics occurring laws |
