棉铃虫大发生之谜已解开近年来棉铃虫在我国许多棉花产区大范围发生，给我国农作物尤其是棉花带来巨大危害。我国科学家经过４年多的试验分析发现，气候干旱、施用氮肥量过大和不合理使用化学农药是棉铃虫在我国大范围发生的主要原因。气候干旱是棉铃虫大发生的主要环境条... In recent years, the mystery of the occurrence of cotton bollworm has been solved. In recent years, the cotton bollworm has occurred on a large scale in many cotton producing areas in our country, bringing great harm to our crops, especially cotton. After more than four years of experiment and analysis by Chinese scientists, it has been found that the main reason for the occurrence of cotton bollworm in our country is arid climate, excessive nitrogen fertilizer application and unreasonable use of chemical pesticides. Climate Drought is the major environmental factor that occurs in cotton bollworm.