玉米弯孢叶斑病是近几年在东阿县玉米上严重发生的１种新病害。该病发展速度快，一旦条件适宜，从始见病斑至病株率发展到１００％，病指发展为８０以上，只需２０ｄ或稍多的时间。一般田块减产２０％左右，严重的达６０％以上。１９９８年７月下旬至８月底，由于连续多场... Corn Curdles leaf spot is a new disease that occurred seriously on maize in Dong’e County in recent years. The rapid development of the disease, once the conditions are right, from the original lesion to diseased plant rate of 100%, the disease developed to more than 80, only 20d or slightly longer time. The general reduction of about 20% of plots, a serious up to 60%. From late July to the end of August 1998, due to consecutive games ...