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为害苗期的害虫有蒙古灰蟓(虫甲)、大灰蟓(虫甲)、网目砂潜、黑绒金龟子、二条叶(虫甲)、玉米茎夜蛾等.网目砂潜为害盛期在5月上中旬,黑绒金龟子为害期在5月下旬至6月上旬.玉米茎夜蛾幼虫钻入玉米的茎基部,造成枯心苗,为害严重时往往需要毁种.蟓(虫甲)类害虫为害更重,常使大豆未出苗便变成秃桩.防治方法:1.喷50%甲胺磷300～500倍液,每亩喷药液100斤,可有效地防治蟓(虫甲)和其它苗期害虫.
Pests of the seedling damage Mongolian gray asiatus (pest), aster ash (insect), mesh sand potential, black velvet beetle, two leaves (insects), corn stem moth, etc. Mesh sand potential damage Period in mid-May, black velvet scotch damage period from late May to early June. Corn budworm larvae bored into the base of corn stems, resulting in dry heart seedlings, serious damage often need to destroy species. ) Pests more serious pests, often without bean sprouts into alluvial piles. Prevention and treatment methods: 1. Spray 50% methamidophos 300 to 500 times the liquid spray 100 pounds per acre, which can effectively prevent gall A) and other seedling pests.