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白叶枯病 Xanthomonas Oryzae Dowson是水稻仅次于稻瘟病的大敌之一。汉中地区以往还未发现,1956年沔县黄沙区黄沙乡前进农业社水稻叶子有变白枯死现象发生,但未肯定是何种病害。58年八月下旬该病又盛发,根据症状证明为白叶枯病,清晨在病叶上也发现了淡黄色的混浊液滴,后经切取叶缘病斑组织进行镜检,从导管中溢出了大量的病原细菌。水稻白叶枯病是由一种细菌(白叶枯病菌)寄生所引起的。主要由种子带病,带病种
Xanthomonas Oryzae Dowson is one of the major enemies of rice next to rice blast. Hanzhong area in the past has not yet found that in 1956 Huang County, Huang County Huangxian advance agricultural society rice leaves have withered white death phenomenon, but not sure what kind of disease. 58 in late August and the disease flourished, according to the symptoms proved to be bacterial leaf blight, early in the diseased leaves also found a light yellow turbid droplets, and then cut the leaf margin diseased plaque microscopy, from the catheter Spilled a large number of pathogenic bacteria. Rice bacterial blight is caused by a bacterial (bacterial blight) parasitism. Mainly from the seed sick, sick kind