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我县于1984—1986年连续三年从黑龙江省齐齐哈尔市,辽宁省沈阳市引进万株以上的巨峰嫁接苗.1987年在个别植株上发现根癌病。1988年以后发病较多较重,占栽植株数的30—40％以上,发病较重的植株相继死亡,约占栽植株数10—15％,因此,防止葡萄根癌病的蔓延,应引起有关部门的注意。一、症状:病菌主要侵染主蔓根颈以及二年生以上的枝蔓,以根颈部位发病较重,发病初期发病部位形成似愈合组织状的瘤状物,稍带浅绿色病粒,内部组织松软,瘤状物逐渐扩大,表面粗糙不平,后期变为褐色,内部组织变白色,逐渐木质化,最后呈腐朽状。根瘤病多为球形或扁球形瘤状,大小不一,肿瘤物形成起伏不平的疙瘩,感病植株生长衰
My county in 1984 - 1986 for three consecutive years from Qiqihar City, Heilongjiang Province, Shenyang City, Liaoning Province introduced more than 10,000 Komagis grafted seedlings in 1987, found in individual plants on the cancer. More incidence of severe after 1988, accounting for more than 30-40% of the number of plants, the heavier incidence of plants have died, accounting for about 10-15% of the planted plants, therefore, to prevent the spread of grape root cancer, should cause the relevant departments Attention. First, the symptoms: the main bacteria infected with the main root of the neck and perennial mandibular, root and neck parts of the incidence of heavier, the incidence of early onset of parts of the formation of healed tissue like tumor, slightly light green tablets, the internal organization Soft, gradually expanding tumor, rough surface uneven, later turned brown, the internal organization becomes white, gradually lignified, finally decadent. Rhizobium mostly spherical or oblate spherical tumor, the size of the tumor formation of ups and downs of the knot, the growth of susceptible plants