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柳蝙幅蛾Phassus excrescens But-ler,又称柳蝙蛾,是为害多种林木和一些果树枝干的害虫。近年发现该虫在局部地区为害玉米。1987年7—8月间在吉林伊通县景台镇的一些玉米田发生。邻近糖槭、杨树,柳树和桃树的地块发生较重,有虫株率个别地块达20—30％。一般每株玉米有虫1头、少数为2头,同时在蓼科杂草的茎秆中也有发现。 此蛾以幼虫钻蛀玉米茎秆。我省为害盛期约在7月下旬至8月中旬,1年发生1代,
Phassus excrescens But-ler, also known as willow moth, is a pest that damages many trees and some fruit tree stems. In recent years, the insect was found to be harmful to corn in some areas. July 1987 occurred in some cornfields in Jingtai Town, Yitong County, Jilin Province. Near the sugar maple, poplar, willow and peach trees occurred heavier plots, the rate of individual strains of plants reached 20-30%. In general, there are 1 insect per plant and 2 small ones, and also found in the stem of weedy weed. This moth drills corn stalks with larvae. Fight damage in our province about late in late July to mid-August, 1 generation occurred a year,