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山药主要病害有炭疽病、褐斑病;虫害主要有蛴螬、红蜘蛛、山药叶蜂。炭疽病山药炭疽病主要为害叶片及藤茎。发病初期叶片上出现黄色小点,后扩大成不规则病斑,边缘呈褐色,中心散布小黑点,后期部分病斑穿孔。病菌的分生孢子盘和分生孢子在病叶上越冬,6~8月发病严重,植株常枯黄、落叶。防治方法:实行轮作,及时消除病残体,冬季收获时,清除病株残叶,平时开好排水沟,降低田间湿度,发病前可喷
The main diseases of yam are anthracnose, brown spot disease; pests are mainly spider mites, spider mites, yam leaf bee. Anthrax yam anthrax is the main damage leaves and cane. Early onset of yellow dots on the leaves, expanded into irregular lesions, the edge of the brown, black spots scattered center, the latter part of the lesion perforation. The conidia and conidia of the bacteria are overwintering on the diseased leaves, and the disease is serious from June to August. The plants often turn yellow and deciduous. Prevention and treatment methods: the implementation of rotation, the timely removal of sick and disabled, winter harvest, remove diseased leaves, usually open a good drainage ditch, reduce the humidity in the field before the onset can be sprayed