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在植物保护中,化学防治占有重要地位,但因化学农药长期大量使用,带来了一系列不良后果,害虫对化学农药的抵抗性逐渐增加,据报道,1958年世界各国约有26种害虫产生了抗性,至1959年增加到228种。长期使用化学农药,杀伤自然界很多有益生物和天敌昆虫,致使害虫猖獗,严重为害农作物。农药残毒为害人畜健康亦引起了各国的普遍注意。因此,迫使许
In plant protection, chemical control occupies an important position, but due to the long-term extensive use of chemical pesticides, it has brought a series of adverse consequences. Pest resistance to chemical pesticides has gradually increased. It is reported that in 1958, about 26 pests were produced in various countries The resistance increased to 228 species by 1959. Long-term use of chemical pesticides, killing many useful natural and natural enemies of insects, resulting in rampant pests, seriously damaging crops. Residues of Pesticide Residues Harmful to human and livestock health also aroused the universal attention of all countries. So forcing Xu