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桑螟:Diaphania Pyloalis Walker 俗称青虫、油虫、卷叶虫等,是秋期为害桑叶的主要害虫。由于桑螟在我县一年发生4—5代,主要是以第五代老熟幼虫越冬,故越冬规律非同于其它鳞翅目害虫。我们于1990—1991年对桑螟的越冬规律进行初步的研究,现将结果报告如下:一、材料与方法1.室内饲养:由4个乡进行调查,每个乡捉150—250头越冬桑螟,放于10只广口水果瓶中,观察和记载越冬后桑螟的化蛹、羽化进度。2.定期调查:通过对不同越冬场所的桑螟进行定期抽样调查,记载各次调查的结果。
Stem borer: Diaphania Pyloalis Walker, commonly known as caterpillar, oil insects, leaf roller insects, is the main pest damage mulberry leaves. Because Stem borer occurred in our county 4-5 generations a year, mainly in the fifth generation of mature larvae overwinter, so the law of winter is not the same as other Lepidoptera pests. We conducted a preliminary study of the winter mulberry borers from 1990 to 1991, and the results are reported as follows: I. Materials and Methods 1. Indoor feeding: surveys were conducted in four townships, and 150-250 winter mulches were collected in each township Borer, placed in 10 wide-mouth fruit bottles, observe and record after the winter mulberry pupal, emergence progress. 2. Periodic surveys: Through the regular sampling survey of mulberry borer in different places of overwintering, record the results of each survey.