银杏大蚕蛾的生物学和防治技术研究

Biology and Control of Dictyoploca japonica

银杏大蚕蛾在湖北一年发生一代。幼虫5龄;4、5龄幼虫有绿色型和黑色型。幼虫取食38种植物,天敌有53种。本文还叙述了该虫发生与环境的关系。防治试验表明:喷洒2.5％溴氰菊酯5000倍液、2×10~8孢子/ml白僵菌液、25％苏脲一号500倍液、1×10~8PIB/mlDjNPV虫尸液效果均很好。

Dictyoploca japonica Moore has one generation a year in Hubei Province. There are 5 instars in the larval stage. The 4th and 5th instar larvae have 2 types with either green or black color. The larvae feed on 38 species of plants and have 53 kinds of natural enemies. The relationship between the occurrence and environment of this insect is discussed. Control experiments showed that spray with various dilutions of 2.5 % deltamethrin (Decis) 5000×, 2×108 spore of Beauveria bassiana, 25% Benzoylphenol urea No.1 500× and the dead body of 1×108 PIB D. japonica infected by NPV were very effective.