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蔬菜生产受许多自然因素和人工、机械物理因子影响,有许多难以预测的病虫害发生。目前,完全不用化学农药还难以控制病、虫为害。化学农药的品种很多,使用化学农药防治农作物病虫害的方法也很多。对蔬菜病虫害的化学防治原则是:严禁使用高毒高残留农药,推广使用安全可靠的低毒少
Vegetable production by many natural factors and artificial, mechanical and physical factors, there are many unpredictable pests and diseases. At present, it is hard to control diseases and insects completely without chemical pesticides. Many varieties of chemical pesticides, the use of chemical pesticides to control crop pests and diseases are many ways. The principle of chemical control of pests and diseases of vegetables is: It is strictly forbidden to use highly toxic and highly residual pesticides, promote the use of safe and reliable low toxicity and less