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一、叶瘟的传染途径:稻瘟的传染源主要是稻种和草。近几年稻草已不大利用,种则成了主要传染源。为了减少这种病源菌的传布,正确地进行盐水选种极为重要,但是,杂草及选种消毒用具也是病源的藏身之地。如果消毒不彻底,育苗箱中也可能混有病菌种子.所以在初苗期就会发病,尤其在高温多湿的环境中,马上会传染给近邻幼苗直至大田。再者是予补苗在田头残留,因过密而极易先发病,其病菌
First, the route of transmission of leaf blast: the main source of infection of rice blast is rice and grass. In recent years, straw has been not used, the species has become the main source of infection. In order to reduce the spread of such pathogenic bacteria, it is extremely important that the proper selection of salt water is carried out. However, weeds and selective disinfection equipment are also sources of refuge. If the disinfection is not complete, seedling boxes may also be mixed with germ seeds, so the disease will occur in the early seedling stage, especially in hot and humid environment, it will immediately spread to neighboring seedlings until the field. In addition, it is to make up the seedling residue in the fields, due to over-dense and extremely easy to disease, the bacteria