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银杏大蚕蛾(Dictyoploca japonica Moore),又名核桃大蚕蛾。1978年以来,在湖北省西部和西北地区的部分核桃产区连年暴发成灾,严重影响核桃的产量。银杏大蚕蛾以幼虫为害核桃叶片,重发年单株虫量一般1000～2000头,有些树虫量多的达3000头以上。受害株果实枯落,树势衰弱,积年为害株整株枯死。 银杏大蚕蛾是一种杂食性食叶害虫,除为害核桃外,还为害梨、苹果、李、桃、梅、樱桃、柿、山楂等多种果树。据朱弘复(1973)报道,该虫分布于广西、华北、台湾和日本。湖北省森林病虫调查记载(1984)分布于郧阳。据1989年我们的调查结果,银杏大
Ginkgo biloba moth (Dictyoploca japonica Moore), also known as large walnut silkworm moth. Since 1978, some walnut-producing areas in the western and northwestern regions of Hubei Province have been ravaged in successive years, seriously affecting the output of walnuts. Ginkgo biloba moth damage to the larvae of walnut leaves, the number of re-emergence of individual insects generally 1000 to 2000, some of the amount of more than 3,000 tree worms. The affected plants withered, tree weakness, the annual damage of the whole plant died. Ginkgo biloba moth is a omnivorous leaf insects, in addition to harmful walnuts, pear, apple, plum, peach, plum, cherry, persimmon, hawthorn and other fruit trees. According to Zhu Hongfu (1973) reported that the insects distributed in Guangxi, North China, Taiwan and Japan. Forest pests and diseases survey in Hubei Province (1984) distributed in Yunyang. According to our survey in 1989, Ginkgo biloba