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近年来,部分社队盲目滥施农药,既增加防治费用,又污染环境,伤害天敌,利少弊多。1972年我站进行杀卵剂(火油、香皂加乐果)试验,在室内试验,杀卵效果达97.3％。但在卖酒大队进行大田试验,防治第五代三化螟卵,施药区平均白穗率为1.72％,对照区为0.57％,施药区白穗率反比对照区高。原因是当时螟卵寄生率达14.75—46.28％,平均18.9％,在卵期施药,寄生蜂大量死
In recent years, some communes and brigades have been blindly spraying pesticides, which not only increases the cost of prevention and treatment but also pollutes the environment and hurts their natural enemies. In 1972, I stood for ovicide (fire oil, soap and dimethoate) test. In laboratory tests, the ovulation killing effect reached 97.3%. However, in the field trial of the liquor sales brigade, the fifth generation rice stem borer was prevented and controlled. The average white spike rate in the application area was 1.72% and that in the control area was 0.57%. The white spike rate in the application area was higher than that in the control area. The reason is that the borer eggs parasitism rate was 14.75-46.28%, an average of 18.9%, in the egg application, parasitic bees died