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拆带黄毒蛾Euproctis flava Brom.是辽宁地区柞树的重要害虫之一,大发生时常将柞叶食光与柞蚕争食,造成柞蚕茧减产。此虫的成虫及幼虫均有毒毛,人接触后皮肤红肿,痛痒难忍,影响工作和学习。1978—1979年,我们对此虫进行了一些研究,仅将防治和天敌情况做一简要报道。 一、利用病毒防治 1978年春,我们在柞蚕场发现感染病毒(NPV)的折带黄毒蛾幼虫,经体表消毒后混蒸馏水捣碎为病毒液,应用时再以清水稀释成每毫升液体中含100万个多角体的病毒液,喷在柞树叶上,黄毒蛾取食后感染死亡率为92％,死亡高峰在喷毒后13—15天。 二、利用药剂防治 用0.01—0.5％浓度的辛硫磷乳剂在室内做防治试验,杀虫效果均为100％;在野外柞
With demodex moth Euproctis flava Brom. Liaoning is one of the important pests of oak trees, often occurs when the edible light and tussah oak food, resulting in tussah cocoon production. Adult and larvae of this insect have poisonous hair, skin irritation, itching, affecting work and study. From 1978 to 1979, we carried out some studies on this pest and made only a brief account of the control and natural enemies. First, the use of virus prevention and control In the spring of 1978, we found in the tussah silkworm farm infected with the virus (NPV) yellow spot moth larvae, the surface disinfection mixed distilled water mashed as a virus solution, and then diluted with water into the liquid per milliliter One million Polyhedron virus solution was sprayed on the oak leaves. The mortality rate of the infected drug was 92%. The peak of death was 13-15 days after spraying. Second, the use of chemical control with 0.01-0.5% concentration of phoxim emulsion in the indoor control test, insecticidal effect are 100%; in the wild oak