论文部分内容阅读
大棚番茄晚疫病是一种重要病害,该病主要危害叶、青果和茎。叶片受害,多从植株下部的叶尖、叶缘或中、上部嫩叶尖端开始,初为暗绿色水浸状不规则病斑,扩大后为暗褐色。高湿时叶背病健交界处产生稀疏白霉。茎秆上病斑,初为淡褐色,后转黑褐色腐
Late blight in tomato greenhouses is an important disease, the disease endanger leaves, green fruits and stems. Leaf damage, mostly from the lower tip of leaves, leaf margin or middle and upper tip of the young leaves began, the beginning of the dark green water-like irregular lesion, expanded to dark brown. Dyspepsia sp. Stem on the lesion, the beginning of the light brown, turn dark brown rot