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1990年7-8月,在京郊和大同地区的番茄上普遍发生一种类似溃疡病的病害,作者分离出12个菌株,做致病性测定,形态特征和主要生理生化特性等项鉴定,确定病原菌为疱病黄单胞杆菌:Xanthomonas campestris pV。vesicatoria(Doidge)Dye1978。称之番茄细菌性疮痂病(见封二)。 该病主要危害番茄的叶、茎和果实。病叶早期在叶背出现水渍状小斑,逐渐扩展,近圆形或连结成不规则型黄褐色病斑,粗糙不
From July to August 1990, a kind of disease similar to ulcer disease commonly occurred on tomatoes in the suburbs of Beijing and Datong. The authors isolated 12 strains and made identification of pathogenicity, morphological characteristics and major physiological and biochemical characteristics. The pathogen was identified as Xanthomonas campestris pV. vesicatoria (Doidge) Dye1978. Known tomato bacterial scab (see cover two). The disease harms the leaves, stems and fruits of tomatoes. Sick leaves in early leaflets appear water-like small spots, gradually expanded, nearly circular or linked to irregular yellowish brown spots, rough not