七月中旬为雨热同季,水稻进入拔节孕穗期,大田开始封行。此时往往同时发生稻瘟病、胡麻叶斑病、细菌性褐斑病这三种病害,其中稻瘟病的危害甚大,急性扩展期一定要打药防治,其它二种病对水稻产量影响不大,可不打药。那么怎样辨别稻瘟病呢? 1.从发病环境看:稻瘟病是在湿度92％以上、温度24～28℃时,稻苗进入分蘖盛期、孕穗期、抽穗期容易感染;而细菌性褐斑病是从幼苗期开始,分蘖期、长穗期、抽穗期 Mid-July rain and heat in the same quarter, rice into the jointing booting stage, Daejeon began sealing line. At this time, the three diseases of rice blast, flax leaf spot and bacterial brown spot are often occurred at the same time, of which rice blast is very harmful. During the acute expansion period, it is necessary to fight against the disease and the other two diseases have little effect on the yield of rice. Fight drugs So how to distinguish between rice blast? 1. From the environment of the environment: rice blast is more than 92% humidity, temperature 24 ~ 28 ℃, the rice seedlings into tillering peak, booting, heading susceptible to infection; and bacterial brown spots Disease is from seedling stage, tillering stage, long panicle, heading stage