甜菜夜蛾在安阳县棉田暴发甜菜夜蛾一般以为害十字花科蔬菜为主。１９９５年在我县棉田暴发，为历史罕见。其为害棉花，主要以取食叶片、苞叶为主，也可蛀蕾铃，将叶片食成孔洞，严重地块上部叶片食叶面积可达２０％。在棉田可发生２代，７月下旬至８月中旬为第一代，８月... Beet armyworm outbreak in Anyang cotton field beet armyworm generally cruciferous vegetables dominated. Outbreaks in 1995 in cotton fields in our county, rare for history. Its damage to cotton, mainly to feed on leaves, mainly bract, but also can be bolted bell, the leaves into a hole into the food, a serious block upper leaf area up to 20% leaf area. In the cotton field can occur 2 generations, from late July to mid-August for the first generation, August ...