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随着工农业生产的不断发展,化学农药的使用量也越来越大。含汞、氯、磷等制剂造成的公害和慢性中毒也日益严重。因此,寻找代替有毒农药的工作引起了国内外普遍重视。而生物农药是目前较为理想的农药品种,近年来发展很快。在日
With the continuous development of industrial and agricultural production, the use of chemical pesticides is also growing. Pollution and chronic poisoning caused by mercury, chlorine, phosphorus and other preparations are also getting worse. Therefore, looking for an alternative to toxic pesticides has aroused widespread attention at home and abroad. The biological pesticide is the more ideal pesticide varieties, developed rapidly in recent years. In the day