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银杏大蚕蛾DictyoplocajaponicaMoore在重庆市城口县 1年发生 1代 ,以卵越冬。卵分布与树龄、树干的关系为 :卵主要分布于 2 0～ 30年盛果期的核桃果树上 ,2 0年生以下及 30年以上的果树则分布较少 ;树干 1m以下的粗皮裂缝内分布的卵占总卵量的 72 5 % ;卵在林间的分布呈低密度、高聚集块状 ,为该虫的预测预报和生产防治提供科学依据。
Ginkgo Bombyx mori DictyoplocajaponicaMoore 1 year in Chengkou County, Chongqing, 1 generation, overwinter with eggs. The relationship between egg distribution and tree age and tree trunk was as follows: The eggs were mainly distributed on the walnut fruit trees with 20 ~ 30 years of fruit-bearing stage, while fruit trees below 20 years old and over 30 years were less distributed; Of eggs accounted for 72.5% of the total eggs; the distribution of eggs in the forest was low density, high aggregated lumps, providing scientific basis for the forecast and production control of the insects.