玉米螟(又叫玉米钻心虫)不但是我国北方旱粮作物的主要害虫,而且也是一种世界性的大害虫.主要危害玉米、高粱,也可危害谷、黍、棉、麻、向日葵…….对玉米除根以外都能危害,最喜吃幼嫩部分.心叶受害,造成花叶和排孔.抽雄后钻蛀茎内,影响雌穗分化与养分输送,使植株易遭风折.打苞时蛀食雄穗,常使雄穗或其分枝折断,影响?? Corn borer (also known as corn borer) is not only the main pest of the northern dry food crops, but also a large pest worldwide, the main harm to corn, sorghum, but also endanger the valley, millet, cotton, hemp, sunflower ... ... On corn except the root can harm, most like to eat young part of the heart leaves damage, resulting in mosaic and row of holes .After the tassel drilled stem, affecting the ear differentiation and nutrient delivery, the plant vulnerable to wind folding. Bud eaten tassels, often make the tassel or its branches broken, the impact of ??