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1合理选择化学农药化学农药具有价格便宜、用量低、使用方便、见效快、防效好等优点,将来仍将是病虫害防治的主要手段。但是化学农药又具有对人、畜有毒,容易污染环境,残留在作物中影响人体健康等缺点,在无公害蔬菜生产中要尽量避免和克服这些问题,做到科学合理使用农药。一是?
A reasonable choice of chemical pesticides Chemical pesticides with cheap, low dosage, easy to use, quick, good control and other advantages, the future will remain the main means of pest control. However, chemical pesticides have the shortcomings of being poisonous to people and animals, easy to pollute the environment and remaining in the crops and affecting human health. In the production of pollution-free vegetables, we should try our best to avoid and overcome these problems so that we can use pesticides scientifically and rationally. First?