近年来，沿江棉区菜棉多熟制迅猛发展，棉花前茬小麦面积减少，蔬菜作物面积扩大。由于食料条件变化，第一代棉铃虫集中在蔬菜作物上发生危害，不仅影响了蔬菜产量和品质，还给棉田下一代发生积累了虫源。第一代棉铃虫基数与第二代发生量呈正相关，防治好蔬菜作物上第一代棉铃? In recent years, cotton growing in the cotton area along the Yangtze River has developed rapidly. The area of ​​wheat in previous cotton crops has decreased and the area of ​​vegetable crops has expanded. Due to the change of foodstuff conditions, the first generation of cotton bollworm concentrated on the crops on the crop damage, not only affects the yield and quality of vegetables, but also to the next generation of cotton fields have accumulated insect population. The first generation cotton bollworm base was positively correlated with the second generation, prevention and control of the first generation of cotton bolls on vegetable crops?