从1976年起,我县棉花栽培由原来的直播逐步改为塑膜育苗移栽。近几年来,全县移栽面积稳定在19万亩左右,占全县棉田总面积的90%以上。在这种栽培条件下,红铃虫的发生危害规律也起了变化。若仍采用原来直播时的“挑治一代,狠治二代,决战三代”的田间防治策略,既不能有效地控制虫害,又增加后期防治压力,增加农药成本。我们在逐步认识和掌握红铃虫发生危害规律 Since 1976, cotton cultivation in our county has been gradually changed from plastic film seedlings to seedlings transplanting. In recent years, the county transplanting area stabilized at about 19 acres, accounting for more than 90% of the total area of ​​cotton fields in the county. In this cultivation conditions, the occurrence of red bollworm harm also changed. If we still use the original live broadcast “pick the generation, ruthless rule the second generation, the decisive battle three generations” of field control strategies, neither effectively control pests, but also increase the prevention and control pressure and increase the cost of pesticides. We are gradually understanding and mastering the law of occurrence of pink bollworm