红铃虫是我区棉花的主要害虫之一,大发生年造成的损失在一成以上。为了搞好红铃虫的综合防治工作,我们根据多年的调查资料,对其发生规律进行了初步分析。 一、发生概况 1.发生时期 红铃虫在我区常年发生三代。以江陵县为例,越冬代幼虫在5月下旬末至6月中旬 Red bollworm is one of the main pests of cotton in our district. The annual loss caused by the occurrence of the bollworm is over 10%. In order to do a good job of integrated management of Red Bellworms, we conducted a preliminary analysis on the occurrence rules based on the investigation data for many years. First, the occurrence of an overview of the occurrence of red bollworm perennial occurred in our district for three generations. In Jiangling County, for example, overwintering larvae in late May to mid-June