进入夏季后,棚内容易出现高温干旱的环境,为各类害虫的发生创造了有利条件。棚室中不仅蚜虫、螨虫等继续为害,而且斜纹夜蛾、小菜蛾、菜青虫等蛾蝶类害虫数量也迅速上升,让菜农大伤脑筋。这些害虫不仅取食植物的汁液,也啃食果实,导致果皮暗淡或开裂,商品性大大降低。因此,菜农要早做防 After entering the summer, shed prone to high temperature and drought environment, for the occurrence of various types of pests and create favorable conditions. Not only aphids, mites and other harmful insects continue to be damaged in the greenhouse, but the number of insect moths such as Spodoptera litura, Plutella xylostella, cabbage caterpillars and the like has also risen rapidly, causing serious problems for vegetable farmers. These pests not only feed on plant juice, but also eat fruit, resulting in dark or cracked peel, greatly reduced the commercial. Therefore, vegetable farmers should do prevention as early as possible