1996年，镇江市科委购进11万m2防虫网，覆盖7.33hm2菜田，采用蔬菜防虫网覆盖栽培技术，在伏缺期生产出无须喷农药的无公害蔬菜30万kg。他们的做法得到国内有关蔬菜、植保专家的肯定，也引起其他城市的关注。防虫网覆盖栽培，是在夏秋季揭掉塑料薄膜的中管棚上，覆上如窗纱、似 In 1996, Zhenjiang Municipal Science and Technology Commission purchased 110,000 m2 of insect-proof net covering 7.33hm2 of vegetable fields and adopted vegetable pest-proof net covering cultivation techniques to produce 300,000 kg of pollution-free vegetables without spraying pesticides during the shortage period. Their practices have been affirmed by domestic vegetable and plant protection experts and have also drawn the attention of other cities. Insect net coverage cultivation, is in the summer and autumn to peel off the plastic film in the shed, covered with such as window screening, it may be