１９９９年７月下旬至８月初，瓜娟螟在贵溪市严重发生。据调查，平均每株有虫１３．８头，最多一片叶上有幼虫８头，一条瓜中有幼虫１２５头，极为罕见。该虫对有机磷和菊酯类杀虫剂产生较强抗药性，特别是对有机磷类杀虫剂如辛硫磷等已产生极强抗药性，农民说这类药打得再浓 Late July to early August 1999, melon Juan borer in Guixi City, a serious occurrence. According to the survey, an average of 13.8 insects per plant, up to a leaf on the larvae 8, 125 melons in a larvae, is extremely rare. The insects produce strong resistance to organophosphate and pyrethroid insecticides, especially against organophosphate insecticides such as phoxim, which farmers have claimed to be strong