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地下害虫是指为害期间和终生生活在土壤中的一类害虫,主要有蝼蛄类、金针虫类、蛴螬类.这些害虫在四月间即开始上升土表,进行活动和为害,五月上中旬是它们为害盛期.地下害虫的防治要根据当地秋季越冬虫量、种类和分布来确定当年的防治措施和方法.地下害中的防治指标为:蝼蛄,每平方米0.1头为轻发生区;0.2头为中等发生区;0.3头为重发生区;0.5头为特重发生区.蛴螬,每平方米0.9头以下为轻发生区;1
Underground pests are a group of pests that live in the soil during and for the rest of their life and are mainly 蝼 蛄, 金 虫 类, 蛴 螬. These pests begin to ascend earth’s surface in April and carry out activities and damage. In mid-May Which is the peak of their life.The prevention and control of underground pests should be based on the local autumn wintering insect species, species and distribution to determine the current prevention and control measures and methods.Controls of underground pests: 蝼 蛄, 0.1 per square meter for the light area; 0.2 were medium-occurring areas, 0.3 were heavy-onset areas and 0.5 were special-occurring areas.