根据田间白叶枯病噬菌体数量的系统测定,可以对病害发生期和流行程度作出预报。但噬菌体数量测定受各种因素的影响,据多年实践的体会,我们认为必须注意如下几个问题。 1.培养基的种类凡白叶枯病菌能够生长的培养基都能作噬菌体测定。但最好的配 According to the systematic determination of the number of bacteriophages in the field, the occurrence and prevalence of the disease can be predicted. However, the determination of the number of phages affected by various factors, according to many years of practice experience, we think we must pay attention to the following questions. 1. The type of medium Where the bacterial growth of bacteria can produce bacteriophages. But the best match