论文部分内容阅读
荻蛀茎夜蛾(Sesamia SP. )是我省危害荻的重要害虫,以幼虫钻蛀茎秆。不防治的田块,荻枯心率一般在30％左右,严重影响荻的产量和质量。作者于1986～1987年在金湖县对该虫的生物学特性及防治方法进行了试验观察。 一、生活史 据室内饲养观察和田间调查资料,荻蛀茎夜蛾在金湖县一年发生一代,以幼虫越夏和越冬。越冬幼虫3月下旬开始化蛹,成虫4月下旬至5月中旬羽化,5月间产卵,幼虫5～6月危害取食,6月中下旬发育至五龄后开始转蛀到荻茎秆的下部越夏,然后在表土下的茎秆中过冬(表1)。
Sesamia sp. Is an important pest damaging diurnals in our province, and larvae are used to drill stems. Non-control plots, digestibula heart rate is generally about 30%, seriously affecting the yield and quality Di. The author from 1986 to 1987 in Jinhu County, the biological characteristics of the insect and control methods were observed. First, the life history According to indoor rearing observations and field survey data, Dulisa stem moth occurs in Jinhu County a generation a year, larva summer and winter. Overwintering larvae began to pupate in late March, the adults emerge from the end of April to the middle of May, oviposition in May, the larvae harmed feeding from May to June, and developed into the fifth year after the fifth instar in June, The lower part of the summer, and then in the topsoil in the winter (Table 1).