由于没有防治细菌病效果较好的农药,所以很多细菌病害都难于防除,一旦侵入未发生地区,捕灭是相当困难的,甚至可以说在许多情况下是不可能捕灭的。为此,许多国家都把重要的细菌病未侵入时就采取防止进入的措施,以此来作为避免为害的最佳手段。在日本尚未发生的重要细菌病害名录上有20种(包括1个变种)。现就其中几种以及 Because there is no pesticide with good bacteriological control effect, many bacterial diseases are difficult to control. Once invaded the non-occurrence area, catching and killing is quite difficult. It can even be said that it is impossible to kill in many cases. For this reason, many countries take measures to prevent entry when important bacterial diseases are not invaded as the best means of avoiding harm. There are 20 species (including 1 variant) in the list of important bacterial diseases that have not occurred in Japan. Now several of them as well