稻瘟病是吉林省水稻的主要病害,各稻区每年都有不同程度的发生,流行年份一般可减产10％～20％,有的达40％～50％,严重的地块甚至颗粒无收,造成绝产。因此,加强防治水稻稻瘟是保证水稻安全生产的一个重要问题,必须引起各级政府和农业推广部门的高度重视。 应用药剂防治水稻稻瘟病是一项十分重要的管理措施,但要掌握好如下几个重要技术环节。 1.要做到早期发现及时防治。目前防治水稻稻瘟病的药剂多属预防药剂,必须在病菌侵入水稻植株体内为害之前喷药,这样才能收到预期效果。进入7月上中旬是稻瘟 Rice blast is the main disease of rice in Jilin Province. Each rice area has different degrees of occurrence each year. Generally, it can reduce 10% ~ 20%, and some 40% ~ 50% Cause junk. Therefore, strengthening the prevention and control of rice blast is an important issue to ensure the safe production of rice and must be given great attention by all levels of government and agricultural extension departments. Application of pesticides to control rice blast is a very important management measure, but to master the following several important technical aspects. 1. To achieve early detection of timely prevention and treatment. At present, most of the agents for controlling rice blast are preventives, and they must be sprayed before the pathogen invades the damaged rice plants in order to receive the expected results. Into the middle of July is rice blast