五一年玉米钻心虫(玉米螟)的为害相当严重,在北京郊区春玉米一般受害株数80%左右,各别地区达100%,每棵春玉米稭平均藏虫数4——5个,在严重地区则有25——35之多。所以我们做虫害防治工作的人员,对这一问题要特别注意。因为玉米钻心虫的一生大部份在玉米稭内,是比较难于预防和除治的,过去虽然有些方法,但都因为操作困难,或不适合于农民目前的经济条件和生活习惯,所以很难推广。 May corn borer (corn borer) is quite serious damage in the suburbs of Beijing, the general number of affected spring maize 80%, 100% in various regions, the average number of insects per spring corn stalk 4 - 5, in the Serious areas are 25 - 35 much. Therefore, we do pest control personnel, pay special attention to this issue. Because corn borers most of the life of corn stalks, it is more difficult to prevent and cure, although in the past some methods, but because of operational difficulties, or not suitable for farmers’ current economic conditions and living habits, it is difficult Promotion.