论文部分内容阅读
一、发病症状番茄细菌性斑点病主要危害番茄叶、茎、花、叶柄和果实。叶片染病,产生深褐色至黑色不规则斑点,直径2～4毫米,斑点周围有或无黄色晕圈。叶柄和茎秆症状与叶部症状相似,产生黑色斑点,但病斑周围无黄色晕圈。病斑易连成斑块,严重时可使一段
First, the incidence of symptoms Tomato bacterial speckles mainly harm tomato leaves, stems, flowers, petiole and fruit. Leaves infected, producing dark brown to black irregular spots, 2 to 4 mm in diameter, with or without yellow halo around the spots. Petiole and stalk symptoms and leaf symptoms similar to produce black spots, but no yellow halo around the lesion. Lesions easily linked into plaque, can make a serious