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杜仲灰夜蛾(Polia sp.)系我国首次发现的一种害虫。该虫在湖北省一年可发生2-3代,以蛹在土中越冬。幼虫共分五龄,五龄前为害杜仲嫩叶,五龄至入土化蛹前啃食杜仲经环剥后再生的新皮。成虫具有趋光性和趋化性。根据该虫的生活习性,可对其采取如下防治措施:1、胶环阻隔,在杜仲环剥处的上下方各涂刷一圈粘胶剂,可阻碍或粘死该幼虫。2、铲除越冬蛹,对树干1.3米以内进行林地垦复。3、铲除蜜源植物,切断成虫的营养来源。4、用糖、醋、酒诱杀或灯光诱杀成虫。
Polia sp. Is the first pest found in China. The worm can occur in Hubei Province 2-3 generations a year, with pupa in the soil overwintering. The larvae are divided into five age groups, which were harmed by Eucommia ulmoides leaves before the fifth instar. Adults have phototaxis and chemotaxis. According to the habits of the insects, they can take the following prevention and control measures: 1, plastic ring barrier at the top and bottom of the Eucommia striae coated with a lap of glue, can hinder or stick to the larvae. 2, the eradication of overwintering pupae, within 1.3 meters of the tree trunk forest reclamation. 3, eliminate nectar plants, cut off the nutritional sources of adults. 4, with sugar, vinegar, wine booby trap or light trap adult.