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近年来,麦圆蜘蛛不但在春季为害拔节孕穗期的小麦,而且还在冬季为害麦苗。去年冬季以来,我市部分乡镇麦圓蜘蛛发生量大,少数田块每平方米有虫3200～6800头,麦苗成片枯死。根据我们试验,杀虫脒和三氯杀螨醇是防治棉红蜘蛛的好药剂,但对麦圓蜘蛛效果较差:用25％杀虫脒水剂500倍液和20％三氯杀螨醇乳油2000倍液防治麦圆蜘蛛,3天后的防效分别为41.2%
In recent years, wheat round spiders not only in the spring to join the joint booting stage of wheat, but also in winter malting wheat seedlings. Since last winter, a large number of spiders have been found in some villages and towns in the city. A small number of fields have 3200 ~ 6800 insects per square meter, and the wheat seedlings become dead. According to our test, chlordimeform and dicofol are good medicaments for controlling cotton spider mite, but have less effect on wheat spider mite. They are used to control wheat round spider with 500 times of 25% Chlordimeform and 2000 times of dicofol 2000 times , 3 days after the control effect was 41.2%