蔬菜防虫网在夏秋蔬菜生长期中使用,是生产无公害蔬菜的关键技术。 一、作用 1.防虫、防病毒病。蔬菜覆盖防虫网后,基本上能免除菜青虫、小菜蛾、甘蓝夜蛾、斜纹夜蛾、黄曲跳甲、猿叶虫、蚜虫等多种害虫的危害,防止害虫传播病毒病。 2.调节气温和地温。实验表明:7～8月,在25目白色防虫网中,早晨和 Vegetable insect net in the growth of vegetables in summer and autumn use, is the production of pollution-free vegetables, the key technologies. First, the role of 1 pest control, anti-virus disease. After the vegetables cover the insect net, the harmful effects of the pests, such as cabbage caterpillar, the diamondback moth, the cabbage budworm, the Spodoptera litura, the beetle, the aphid and the aphid are basically avoided and the virus is prevented from being transmitted by the pest. 2. Adjust the temperature and ground temperature. Experiments show that: July to August, in the 25-mesh white insect net, morning and