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常常听到群众说:“越打药,虫子越重.”这主要是多年来大面积连续应用广谱性杀蚜药剂,杀伤大量天敌,破坏了生态平衡,引起害虫再猖獗的恶果.怎样才能做到既有效地防治害虫,又避免或减少杀伤天敌,恢复和保持生态平衡呢?我们经过两年大面积实验,证明间隔施药(一些垄施药,隔一些垄不打药)防治大豆蚜虫效果好(可参见本刊1979年第11期《豆田间隔施药防治大豆蚜虫》),它具有省工、省药、减少污染、保护天敌恢复生态平衡的作用.怎样进行间隔施药呢?首先要调
They often hear the masses say: “The more we play the medicine, the heavier the insects.” This is mainly due to the continuous application of a broad spectrum of aphids for many years to kill a large number of natural enemies, destroy the ecological balance and cause the pest to re-rampant. To effectively prevent and control pests and avoid or reduce natural enemies, to restore and maintain the ecological balance? After two years of large-scale experiments, we proved that the interval spraying (some ridge spraying and no ridge spraying) is effective in controlling soybean aphids (See my issue No. 11 of 1979 “soybean field pesticide application control soybean aphid”), it has the provincial workers, provincial medicine, reduce pollution and protect natural enemies to restore the ecological balance of the role.