时下正是春玉米播种时期,可近年来春玉米和夏玉米生长到5月中旬至7月期间,极易发生「粗缩病」。曾有一农户的4亩多玉米,在7月上旬相继发病而又缺少有关防冶知识,900%以上的玉米苗部患有秆萎缩变粗不挂玉米棒头,像常绿植物「万年青」一样,有棒头的穗上只有二三十粒 Nowadays it is the spring corn sowing period. In recent years, spring maize and summer maize grow easily from mid May to July. Had a farmer 4 acres of corn, in early July, one after another illness and the lack of knowledge about the prevention of smelting, more than 900% of the corn seedling suffering from atrophy stalk hanging corn head, like the evergreen “Evergreen” the same , There are only twenty or thirty tablets of the head of the ear