地下害虫主要有蝼蛄、蛴螬、地老虎和金针虫等,主要取食作物的种子、根、茎、块根、块茎、幼苗、嫩叶及生长点等,造成缺苗、断苗、断垄或使幼苗生长不良,导致农作物减产。 1 症状诊断 1.1 蛴螬金龟子的幼虫,取食作物的幼根,茎的地下部分,咬伤或咬断根部,断口比较整齐,使幼苗枯萎死亡,大豆、甜菜、高粱受害较重。1.2 叩头虫叩头虫的幼虫,为害小麦、玉米、高粱、马铃薯 Underground pests are mainly 蝼 蛄, 蛴 螬, tigers and insects and other insects, the main food crops, roots, stems, roots, tubers, seedlings, young leaves and growth points, resulting in lack of seedlings, broken seedlings, broken ridge or so Poor seedling growth, leading to reduced production of crops. 1 Symptoms diagnosis 1.1 蛴 螬 Chafer larvae, feeding crops root, stem underground, bite or snap off the root, the fracture is relatively neat, the seedlings withered death, soybeans, beets, sorghum heavier. 1.2 beetle beetle larvae, damage to wheat, corn, sorghum, potatoes