薤炭疽病发生与防治

Occurance and Control of Scallion Anthracnose

在浙江省舟山市定海，薤炭疽病一般在４月底至５月初始发，５月中、下旬出现发病高峰。适温高湿是该病流行的重要因素，水田种植及连作有利于薤炭疽病的流行。该病造成的产量损失，在水田一般为２０％～５０％，旱地一般为１０％～２５％。药剂防治试验结果表明，５０％多菌灵可湿性粉剂、７０％乙磷铝锰锌及７５％百菌清可湿性粉剂对该病均有较好的防效。

The scallion anthracnose started occurring from the end of April to the begining of May in Zhoushan Island,Zhejiang,China. It reached maximum at the middle or the last ten days of May. A moderate temperature and heigh humidity were the important factor for the disease epidemic. Irrigated or continuous cropping field was in favor of the disease occurance. The yield loss caused by the disease was 20%～50% in irrigated field,and 10%～25% in nonirrigated farmland. The disease could be controlled by application of 50% carbendazim WP or 75% chlorothalonil WP etc.