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一提到虫子,人们往往在“虫”字的前面加个害字,使害虫成了虫子的同义词。实际上,真正危害农作物的害虫,在昆虫世界所占的比例很小,据估计,不到总数的1％。就是说,在昆虫世界中有99％以上的昆虫是无害的。我们通常施用广谱性杀虫剂防治害虫,效果虽好,却无法区别昆虫的益害,而是“格杀勿论”,从而使自然的生态平衡遭到破坏。因此,用生物防治的方法,控制害虫的发生发展,已越来越被人们所重视。
Mention of worms, people tend to add a pest in front of the word “pest”, making the pest a synonym for insects. In fact, pests that really harm crops are small in the insect world and are estimated to be less than 1% of the total. That is, over 99% of insects in the insect world are harmless. We usually use broad-spectrum insecticides to control pests. Although the effect is good, we can not distinguish the beneficial effects of insects, but “kill or not kill”, so that the natural ecological balance is destroyed. Therefore, using biological control methods to control the occurrence and development of pests has drawn more and more attention.