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现在,生物农药特别是细菌性杀虫剂已有很大的可能性逐步代替现时所用的污染环境、广谱、能耗大的化学杀虫剂。许多化学杀虫剂能在环境中持久存在,能伤害非用药目标的许多种生物。并且,目标生物对化学合成的杀虫剂比对微生物杀虫剂易于获得抗药性。已知有近一千五百种天然存在的微生物或微生物代谢产物具有杀虫特性,此数之外,现在还在增加新的产毒素品系——它们是遗传工程的产物。在昆虫病原细菌中,研究得最多的
At present, biological pesticides, especially bacterial pesticides, have great potential to gradually replace the currently used chemical insecticides that pollute the environment, have a broad spectrum of energy consumption and are of great use. Many chemical pesticides can persist in the environment and can harm many species that are not targeted by the drug. Moreover, the target organism is more resistant to chemically synthesized pesticides than to microbial pesticides. Nearly 1,500 kinds of naturally occurring microbial or microbial metabolites are known to have pesticidal properties beyond this number and new toxin producing strains are now being added - products of genetic engineering. Among insect pathogenic bacteria, the most studied