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地老虎是春播作物较常见的地下害虫。近年来,有些地方因地老虎防治不及时和防治方法不当,造成春播作物严重缺苗断垄和重种、补种现象。为解决这一问题,1988年我们在农场6亩春土豆田地老虎密度为每平方米2.3头的地块试用毒叶进行防治,取得了良好的效果,田间保苗率达98％以上;虫口下降率95.7％;室内试验,用毒叶饲喂3～6龄幼虫致死率达100％。毒叶的制作方法是:在桶内或其它容器中盛入一定量300～400倍的久效磷药液(也可用甲胺磷、SN851等具有内吸性的农药),然后将
Tigers are the more common underground pests of spring-sown crops. In recent years, in some places, the prevention and cure of tigers in the field has been delayed and the methods of prevention and treatment have not been implemented properly. As a result, there is a serious shortage of seedlings and seed replanting and replanting in spring-sown crops. In order to solve this problem, in 1988, we experimented on poisonous leaves in 6 acres of spring potato field with a density of 2.3 heads per square meter and obtained good results. The seedling protection rate in the field was over 98% 95.7%; indoor test, with poisonous leaf feeding 3 to 6 instar larvae mortality rate of 100%. Poisonous leaf production methods are: in the bucket or other container containing a certain amount of 300 to 400 times the monocrotophos liquid (also available methamidophos, SN851 and other internal absorption of pesticides), then