红铃虫是南方棉区的主要害虫,彭泽棉区常年因此损失产量一、二成,大发生年损失二、三成以上。从红铃虫年中消长规律看,历年都是第三代虫口密度激增,为害严重,进入越冬的虫口基数也高。据统计,每亩籽花含虫数历年平均达23798头,而从籽花 Red bollworm is the main pest in southern cotton area, Penzine cotton area thus losing annual output of one or two percent, the annual loss of large occurred two or three percent. From the law of the growth and decline of the red bellwash mid-year, the density of pest population of the third generation has been increasing over the years, with serious detrimental consequences. The number of insect population entering the winter is also high. According to statistics, per acre seed flower insect number over the years up to 23,798 heads, and from the seed flowers