小麦吸浆虫防治适期研究初报

选择不同杀虫剂、不同时期对小麦吸浆虫的防治效果试验表明，在秋季麦播前土壤处理，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；而小麦抽穗露脸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，这一物侯现象群众容易掌握。此前及此后羽化的成虫多为无效虫源。所以，把小麦抽穗露脸70％～80％作为吸浆虫的防治适期符合当前的生产现状。

PRELIMINARY REPORT OF THE SUITABLE PERIOD OF CONTROLLING WHEAT MIDGE

The experiment of selecting different pesicides to control wheat midge in different periods was carried out. The result showed that the control effects of soil treated in fall before sowing wheat was not satisfied. In the period of nymph stage and ecdysis peak, the control effects was better but it need highly professional technique and not suitable for guiding farmer to control the midges. The best control period was in wheat earing stage with 70% ～ 80% wheat ears appear and the period of wheat midge laying ovals peak, because most adults ecdysising just before or after this period were not effective pest source and the biotemperature phenomenon was easy to grasp by most farmer. Most of the adults which ecdysising just before or after this time are not effective. So, determining the period when 70% ～ 80% wheat are coming into ear as the suitable control time is applicable under present production situation.