小麦吸浆虫防治适期研究

研究不同杀虫剂在不同时期对小麦吸浆虫的防治效果,结果表明:在秋季麦播前进行土壤处理,防效不理想;在吸浆虫蛹期、羽化高峰期防治虽能获得较好的防治效果,但需要专业技术人员掌握发育进度,不适合指导群防群治;而小麦抽穗70%～80%时,正值吸浆虫产卵始盛期,此期防治能获得事半功倍的效果,这一物候现象群众容易掌握,因此把小麦抽穗70%～80%作为吸浆虫的防治适期符合当前的生产现状。

Study on Suitable Period of Controlling Wheat Midge

Two years'research were carried out on dissecting the initial female adults of rice skipper to analyze the growth of germanium and to investigate their occurrence systematically.The results indicated that all the local initial female adults had been mated and the growth of their germanirm were above 4th degree.The last generatiln larva in weeds died before they changed into nymph.Any states of rice skipper could not be found in hibematiln stage in many places.The former and the later generation larva's popu...