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四平市玉米种植面积约占粮食作物种植面积的70％,其产量占粮食总产的80％左右。由于玉米螟的为害,常年玉米产量损失率约7％。目前对玉米螟的防治仍以玉米心叶未期投撒颗剂的方法为主,近年来由于有机氯农药停用和螟虫发生期延后,筛选新的药剂用于田间防治(玉米螟),尤其是残效期长的药剂的筛选成为紧迫课题。为此,我们开始了这方面的研究。1986年做了多种药剂室内和田间的筛选工作,1987年进行了多点验证试验及药剂防治示范,现已明确3％1605等六种药剂的防治效果良好,可以进一步示
Siping City, corn planting area accounts for about 70% of the area planted to food crops, its output accounted for about 80% of total grain output. Due to the damage of corn borer, perennial corn yield loss rate of about 7%. At present, the prevention and control of corn borer is still based on the method that the corn leaf is not cast in time. In recent years, due to the deactivation of organochlorine pesticides and the delayed occurrence of stem borers, the new medicaments are screened for field control (corn borer) In particular, the screening of long-acting drugs has become a pressing issue. To this end, we started this research. 1986 made a variety of pharmacy indoor and field screening work carried out in 1987, a number of verification tests and prevention and treatment of pesticides, it has been clear that 3% 1605 and other six kinds of pharmaceutical control effect is good, you can further