据全国农技服务中心病虫测报处近期预报,今年玉米中后期病虫害总体发生危害偏重,发生程度重于常年,虫害重于大发生的去年。八月中旬至九月上旬,是玉米穗虫的危害盛期。危害玉米的穗虫有棉铃虫、玉米螟、粘虫、桃蛀螟、高粱条螟、秋毛虫等。随着近年来种植茬口的增多、间作套种面积的扩大,为玉米穗虫提供了多途径来源,形成穗期集中危害,对玉米的产量和质量影响较大。在玉米穗虫大发生年份,一般减产一到两成,且影响籽粒品质。据笔 According to a recent forecast by the Pest and Disease Detection Service of the National Agricultural Technology Service Center, pests and diseases in the middle and late maize fields in this year will be more or less endangered. The degree of occurrence is heavier than perennial pests and pests occur in the last year. From mid-August to early September, it is the damaging period of corn earworms. Corn earworms harm cotton bollworm, corn borer, armyworm, peach borer, sorghum strip borer, autumn caterpillars and so on. With the increase of planting stubble in recent years, the intercropping area increases, providing multiple sources for corn earworm, forming the concentrated damage in the ear stage, and greatly affecting the yield and quality of corn. In corn earworm occurrence year, the general reduction of one to two into, and affect grain quality. According to the pen