论文部分内容阅读
一、斑枯病。又称晚疫病、叶枯病。主要为害叶片,其次是叶柄和茎。一般先发生在基部老叶上,后向新叶上扩展。病斑初为淡褐色油浸壮小斑点,扩大后,病斑外缘黄褐色,中间黄白色,边缘明显,病班上散生许多小黑点,危害严重时,全株叶片变为褐色干枯状。叶柄和茎受害,病斑均呈长圆形,稍凹陷。生长期间发病,常造成严重减产甚至绝收。储藏中也可继续为害造成损失。发生规律。病菌主要以菌丝体潜伏在种皮内,以及在病残体上
First, spot blight. Also known as late blight, leaf blight. The main damage leaves, followed by petioles and stems. Generally occurs first in the base of the old leaves, after the new leaves on the expansion. Lesions as a light brown early oil soaked small spots, expand, the lesion edge brown, middle yellow and white, the edge is obvious, the sick class scattered many small black spots, the serious damage, the whole plant leaves turn brown dry shape. Petiole and stem damage, lesions were oblong, slightly depressed. Occurred during the growth period, often resulting in serious cuts or even absolute. Storage can also cause harm to damage. Laws occur. Mycotoxins mainly lurk in the seed coat, as well as in the diseased body