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目前在白叶枯病的测报方面,有采用设立预测田的方法,但只能在见病后预报病害的发生趋势,不能测报于病害发生之前。往往生产上来不及防治即造成危害。几年来我们应用噬菌体检验法进行预测预报,即通过测定稻田水中噬菌体的消长,来推测菌量的消长;再从菌量的消长,来预测病害的发生时间和病情严重度。这个方法可在短期内、较大范围内发出预报;比设立预测田,查发病中心等方法,提前10天做出判断。 一、测定稻田水中噬菌体数量的方法: 分本田田水定点系统测定和面上短期测定两部分。本田田水定点系统测定,早稻田从5月下旬开始,中稻田和杂交稻田分别在
At present, there is a method of forecasting bacterial blight in the area. However, it can only forecast the occurrence trend of the disease after seeing the disease and can not measure the disease before the disease occurs. Often the production is too late to prevent and control that is harmful. In recent years, we use the phage test to predict and forecast the growth of phage in paddy water to estimate the growth and decline of the bacteria. Then we can predict the occurrence time and the severity of the disease from the growth and decline of the bacteria. This method can be issued within a relatively short period of time, forecasting; than the establishment of the forecast field, check the center and other methods, to make judgments 10 days in advance. First, the method of determining the number of phage in paddy water: Honda Shimizu fixed-point system to determine the surface and short-term determination of two parts. Honda Tianshui fixed-point system, early rice fields from late May, mid-paddy fields and hybrid rice fields were