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油桐卷斑螟是油桐主要害虫之一,林间世代重叠。在福建南平,1年发生7代,以蛹在地面落叶中,少数在土缝中越冬。幼虫取食嫩叶、顶芽,对油桐幼苗造成严重损害,在桐林除食叶外,还能蛀食花蕾及幼果表皮,造成落花落果。幼虫5龄,老熟幼虫于卷叶内化蛹。卵多散产于叶背。结合秋冬垦复,清除落叶集中销毁,是压低发生基数的关键措施。要抓紧第一代幼虫防治,室内试验证明:2—3龄幼虫对多种农药敏感,林间以“741”烟剂防治幼虫,效果良好。
Tamarillo borer is one of the main pests of tung oil, and the intergenerational forests overlap. In Nanping, Fujian, seven generations occurred in one year, with pupae falling on the ground and a few overwintering in soil seams. Larvae feeding young leaves, the top buds, causing serious damage to tung oil seedling, in addition to eating leaves Tong Ling, but also eaten buds and young fruit skin, resulting in falling flowers. Fifth instar larvae, mature larvae in the involucrata pupal. Egg and more scattered in the leaf back. Combined with autumn and winter reclamation, clearing the leaves to focus on the destruction, is to reduce the occurrence of the key measures. To seize the first generation of larvae prevention and control, indoor tests show that: 2-3 instar larvae sensitive to a variety of pesticides, forest to “741” tobacco control larvae, the effect is good.