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杀虫双(杀虫单)曾经是浙江省防治水稻螟虫的理想药剂,在我省已使用了近20年。但自90年代初以来在我省南部地区陆续反映防治效果不佳,各地相继出现使用杀虫双(杀虫单)螟虫“越治越重”的现象。经近年来的田间试验和室内毒力测定,导致出现这种现象的主要原因是由于我省水稻二化螟对杀虫双(杀虫单)产生了明显抗性,这也是我省连续5年水稻二化螟大发生的主要原因之一。这种情况主要表现为: 1.田间防治效果下降。根据我省各地田间药效试验结果,目前我省杀虫双(杀虫单)对水稻二
Insecticidal double (insecticidal single) used to be the ideal agent for controlling rice stem borer in Zhejiang Province, which has been used in our province for nearly 20 years. However, since the early 1990s, one after another in the southern region of our province has been reported to be ineffective in prevention and treatment. The phenomenon of using double insecticides (insecticide single) stems and insects more and more heavily is emerging everywhere. After years of field trials and indoor toxicity determination, the main reason leading to this phenomenon is due to our province rice stem borer on insecticidal double (insecticide single) had a significant resistance, which is our province for 5 consecutive years Rice Stem borer one of the major causes. This situation is mainly manifested as: 1. Field control effect decreased. According to the field test results across the province, the current pesticides in our province double (insecticidal single) of rice two