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黄地老虎属鳞翅目夜蛾科昆虫,是棉、粮、蔬菜等农作物苗期主要地下害虫之一。1979年在大丰县发生面积占全县棉花计划面积的50％左右。 一、发生规律 黄地老虎在我县一年发生3代,虫态不整齐,第一代成虫在4月中旬至6月初发生,第二代在7月上、中旬发生,第三代在9月中旬至10月上旬发生。幼虫第一代在5月下旬至6月中旬,第二代在7月下旬,第三代在10月中、下旬发生。第一代幼虫在6月上旬左右棉花定苗以后进入暴食期,造成大量缺苗、断垄,严重影响棉花产量。但第二代、第三代对作物不致造成损害。
Yellow tiger genus Lepidoptera noctuid insects, cotton, grain, vegetables and other crops one of the main underground pests. Occurred in Dafeng County in 1979 accounted for an area of about 50% of the county’s cotton plan area. First, the occurrence of law Yellow Tiger in our county occurred three generations a year, the bugs are not regular, the first generation of adults occurred in mid April to early June, the second generation in July, mid-occurred, the third generation in 9 Mid-month to early October. The first generation of larvae in late May to mid-June, the second generation in late July, the third generation in mid-October, occurred in late. The first generation of larvae in early June around cotton Dingmiao into gluttony period, resulting in a large number of lack of seedlings, broken ridge, seriously affecting the yield of cotton. However, the second generation and the third generation will not cause any damage to the crops.