玉米尾孢菌、弯孢菌叶斑病严重流行及防治对策

The Sevevity of Pervalence and the Control Strategy of Corn Leaf Spot Caused by Cercospora Zeae-maydis and Curvularia lunata.

摘要:

近几年来，由于气候适宜和感病品种多年的大面积种植，导致我国玉米种植区的玉米尾孢菌、弯孢菌叶斑病的危害越来越重，辽宁、河北、河南等地均有发生，尤以辽宁发生最为严重，一般减产10%～20%，个别地块的感病品种几乎绝产，所以必须引起高度重视，应以推广抗病品种为重点，采取合理的品种布局及药剂防治等进行综合防治。

Abstract:

In recent years,as a result of the weather contition and disease-susceptible maize varieties in large areas cultivation year by year,the com leafspot disease caused by Cereospora Zeae maydis and Curoularia lunata has been more and more serious in main com areas.This disesase has beed found in Hebei,Henan,particularly in Liaoning and other districts.It Pan make maize reduce production 10-20% on the average,and even in some areas cause susceptive maize varieties out of production,Therefore,we must take this disesase seriously.The resistant maize varieties should be popularized as the focal point of our work,other mathods such as rational control,shoud be used for the intergerated control to the disease.