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防虫网是一种新型覆盖材料,具有遮荫、防虫等作用,在多虫季节蔬菜上覆盖防虫网,可减少农药应用和产品污染,达到无公害生产的目的。1.防虫网的重要作用(1)防虫我省夏秋季节是菜青虫、小菜蛾、斜纹夜蛾、甘蓝夜蛾、甜菜夜蛾、蚜虫等多种害虫的多发时期。因防虫网的网眼很小,一般密度为24～30目,采用防虫网覆盖后,害
Insect net is a new type of cover material, with shade, pest control and other effects, in the bug season vegetables covered with insect net, pesticide applications and product contamination can be reduced to achieve the purpose of pollution-free production. 1. An important role of insect net (1) pest control The summer and autumn in our province cabbage caterpillars, diamondback moth, Spodoptera litura, cabbage Lantern, beet armyworm, aphids and other pests of the multiple period. Due to the small insect-proof mesh, the general density of 24 to 30 mesh, the use of insect net coverage, the harm