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一、葡萄细菌性根癌病(Agrobacter-ium tumefacians)1986年在唐山市新区零星发现,1987年病株率5.7％,东马庄葡萄园较重,发病率36.8％,其中巨峰品种达68.4％,玫瑰香几乎不发病。
1. Agrobacter-ium tumefacians In 1986, a sporadic discovery was found in Tangshan New District. In 1987, the rate of diseased plants was 5.7%. The grapes in Dongmazhuang were heavier with the incidence rate of 36.8%, of which 68.4% Rose incense almost no disease.