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甘薯属绕草质藤本,一年生或多年生蔓生草本。又名山芋、红芋、番薯、红薯、白薯、地瓜、红苕等,因地区不同而有不同的名称。甘薯排种期,也是病害茎线虫病、病毒病和黑斑病高发期,生产中要注意防病。1病害特征(1)茎线虫病:又名糠心病、空心病,发病薯苗在近地表处,外观变青,没有明显边缘和病斑,苗根部受害,在表皮上生有褐色晕斑,造成甘薯发育不良、矮小发黄。
Ipomoea around the grass vine, perennial or perennial vine. Also known as potato, red taro, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, etc., due to different regions and have different names. Sweet potato row seed stage is also a disease stem nematode disease, viral disease and black spot high incidence of production should pay attention to disease prevention. 1 disease characteristics (1) Stem nematode disease: also known as heart disease, heart disease, hollow disease, the incidence of potato seedlings in the near surface, the appearance of green, no obvious edges and lesions, seedling root victims, the students have brown spots on the epidermis, Caused by poor growth of sweet potato, short yellow.