论文部分内容阅读
近年来,玉米病虫危害呈逐年加重趋势,已成为玉米生产上的主要限制因素。其主要病虫害有玉米黑粉病、玉米灰斑病、玉米褐斑病、地老虎、粘虫和玉米螟等,所以,在玉米生长发育过程中,必须搞好病虫害的综合防治工作,以最大限度地减少其危害。1、玉米黑粉病:玉米整个生长期地上部分均可受害,但在抽雄期症状表现突出。植株各个部分可产生大小不一的瘤状物,大的病瘤直径可达15厘米,小的仅达1—2厘米。
In recent years, the harm of pests and diseases of corn has been increasing year by year, which has become the main limiting factor in the production of corn. The main pests and diseases are corn powdery mildew, corn gray spot, maize leaf spot, land tiger, armyworm and corn borer, etc. Therefore, in the process of corn growth and development, we must do a good job in comprehensive prevention and control of pests and diseases in order to maximize To reduce its harm. 1, corn powdery mildew: corn throughout the growing period can be affected on the ground, but outstanding performance in the tasseling period. Various parts of the plant can produce different sizes of tumor, a large tumor up to 15 cm in diameter, small only 1-2 cm.