地下害虫是指活动期间生活在土中，危害农作物的地下部分或近地面部分的一类害虫，它们分布广，种类多，危害重，主要包括蝼蛄、蛴螬、金针虫和地老虎。一般情况下地下害虫的活动方式可分为三类。第一类是地下地上均危害的，如蝼蛄。第二类是白天潜伏地下，夜间钻出地面危害的 Underground pests are a group of pests that live in the soil and endanger the underground or near-surface parts of the crops during their activities. They are widely distributed, diverse and heavily devastated. They include predatory insects, slugs, insects, and tigers. Under normal circumstances, the activities of underground pests can be divided into three categories. The first category is harmful to the ground, such as 蝼 蛄. The second category is the underground lurking during the day and drills the ground at night