水稻品种之间对白叶枯病菌(Xantho-monasCompestris PV.Oryzae)的抗性存在着明显的差异。一个抗病品种育成和推广一定年限后,其抗病性在某些地区出现丧失的现象。近年来国内外的研究表明:白叶桔病细菌与品种之间有特异性,认为白叶桔病细菌存在不同的生理小种。因此,摸清不同品 There is a clear difference in resistance to Xantho-monasCompestris PV.Oryzae between rice cultivars. After a certain disease-resistant breed has been bred and popularized for a certain number of years, its disease resistance will be lost in some areas. In recent years, domestic and foreign research shows that: white leaf orange disease bacteria and species specificity, that white leaf orange bacteria exist different physiological races. Therefore, find out different products