棉铃虫历年是邯郸地区棉花蕾铃期的主要害虫,一年发生四代,尤以二代危害最重,近年来危害有加重趋势。如何准确预测二代棉铃虫发生量,是经济防治的关键。一、预报因子的选取二代棉铃虫发生量可选用二代卵量(Y) Helicoverpa armigera is the main pest in cotton bud bolling period in Handan. It takes four generations a year, especially the second generation, which is hardest to harms. In recent years, the harm tends to increase. How to accurately predict the occurrence of second generation cotton bollworm is the key to economic control. First, the forecast factor selection Second generation of cotton bollworm occurrence of the amount of second generation eggs can be used (Y)