番茄斑枯病,又叫斑点病、鱼目斑病、白星病,是番茄上的重要病害之一,在番茄各生育期均有发生,在结果期发病严重时,会造成早期落叶,影响产量。 该病主要危害叶片、茎和花萼,果柄和果实受害较少。一般植株下部老叶先发病,逐渐向上蔓延。初发病时,叶片背面出现圆形水渍状小斑点,以后稍扩大,边缘深褐色,中心灰白色,并散生黑色小粒点。由于病斑形状如鱼目,故有鱼目斑病之称。发病严重时,叶片逐渐枯黄,植株早衰,造成早期落叶。斑枯病在茎上危害,表现为褐色椭圆形病斑。果实受害时,出现褐色圆形病斑。 Tomato spot blight, also known as spot disease, fish spot disease, white star disease, is one of the important diseases on tomato in tomato growth period have occurred in the serious consequences of the results, will result in early deciduous, affecting the yield . The disease endanger leaves, stems and calyx, fruit stalk and fruit less damage. Lower leaves of the general plant first onset, gradually spread upward. Initial incidence, the back of the leaves appear round water-like small spots, slightly expanded later, the edge of dark brown, gray center, and scattered black small particles. As the lesion shape such as fish head, so there is a fish spot disease known. Serious onset, the leaves gradually yellow, premature aging plants, resulting in early deciduous. Spot blight on the stem hazards, manifested as brown oval lesions. When the fruit is damaged, a brown roundish spot appears.