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1985～1987年,我们开展了用喹硫磷(供试药剂为嘉兴农药厂生产的25％喹硫磷乳油)防治菜青虫的试验研究,并在大田防治中广泛应用,取得了良好效果,现将结果简要报告如下。一、室内试验 1.杀卵效果用不同浓度药液浸卵、蘸药点卵、喷雾三种方法处理,效果都很好,浓度为1000～2000倍的,杀卵效果都达100％,3000～5000倍的效果各重复平均都在93.1～98.2％之间。为明确残留杀卵效果,分期喷药,同日接成虫产卵。结果表明:喷药第3天接卵,效果即明显下降。喷药当天接卵,效果为83.3％,第二天接卵为75.5％,第3天为32.8％,
From 1985 to 1987, we conducted a pilot study on the prevention and control of Pieris rapae with quetiapine (the test agent was 25% quetiapine EC produced by Jiaxing Pesticide Factory) and was widely used in the field control and achieved good results. Now The results are briefly reported below. First, the indoor test 1. Ovicidal effect with different concentrations of liquid soaked eggs, dipped in point eggs, spray three ways to deal with the effect is very good, the concentration of 1000 to 2000 times, the ovicidal effect of up to 100%, 3000 ~ 5000 times the effect of the average repeat between 93.1 ~ 98.2%. In order to clarify the residual egg killing effect, spraying in phases, the same day then adult eggs. The results showed that the effect of spraying on the 3rd day after spraying was obviously decreased. Spraying on the day of spraying the egg, the effect was 83.3%, the next day received eggs was 75.5%, 32.8% on the third day,