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玉米螟是杂食性害虫,以危害王米为主.一般年份,玉米因螟害减产10%左右,严重年份减产30%以上,多年来,防治王米螟以化学防治为主,对控制螟虫起了一定作用.利用抗虫品种控制螟害是一种经济有效的方法.近几年,我国不少科研单位,分别进行了玉米品系抗螟性鉴定工作,其鉴定玉米品系500多个.培育抗螟品种是一个方向,据报导产生抗螟性的原因,主要是玉米内部存在着抗虫素,可以抑制初龄幼虫的发育,甚至引起死亡.玉米中所含的抗虫素,一是可溶于乙醚的抗螟素甲,一是不溶于乙
Corn borer is a omnivore pest, with the main damage to Wang rice.Generally, the damage of maize due to stem borer is reduced by about 10% and the serious year is reduced by more than 30%. Over the years, the prevention and control of rice borer is dominated by chemical control, The use of insect-resistant varieties of stem borer control is a cost-effective method.In recent years, many scientific research units in China, respectively, the identification of the resistance of corn lines, identification of maize lines more than 500. Incubation resistance Stem borer is one direction, the reasons reported to produce resistance to borer, the main corn is the presence of anti-infectives, can inhibit the development of the first instar larvae, and even cause death .comycin contained in corn, one soluble In the ether of anti-stem borer, one is insoluble in B.