论文部分内容阅读
玉米是我县主要秋粮作物之一,常年种植面积25万亩左右。玉米茎腐病是近两年来我县玉米上新发生的一种病害,对玉米的生长发育影响很大。1988～1989年仅零星发生,1990年发展到4000亩左右,主要分布在张市、蔡庄、十八里等乡,平均病株率8%,高的达12%以上,已成为玉米生产上一种突出病害。一、症状玉米茎腐病主要危害玉米叶鞘和茎秆。典型症状是在玉米植株中部的叶鞘和茎秆上
Corn is one of the main autumn crops in our county. The annual planting area is about 250,000 mu. Corn stalk rot is a new disease that occurs on maize in our county in recent two years and has a great impact on the growth and development of corn. It only sporadically occurred from 1988 to 1989 and developed to about 4,000 acres in 1990. It is mainly distributed in towns such as Zhang City, Cai Zhuang and Shibalili, with an average diseased plant rate of 8% and a height of over 12%, which has become a major problem in corn production A prominent disease. First, the symptoms Corn stalk rot harms the main sheath and stems. Typical symptoms are on the leaf sheath and stem in the middle of a corn plant