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苧麻上已发现的病害有10余种,现将其中几种主要病害及其防治措施简述如下。苧麻主要病害苧麻是多年生作物,地下部病害的综合防治较地上部尤为突出。地下部的主要病害有3种:(1)根腐线虫病。病原线虫为害地下根和地下茎主要为害萝卜根。病斑初期为不规则黑褐色小斑,稍凹陷,后扩大为黑褐色大斑,内部呈黑褐色海绵状朽腐。病株矮小、
Ramie has been found in more than 10 kinds of diseases, several of which now are the main diseases and prevention measures outlined below. The main ramie ramie is a perennial crop, comprehensive prevention and treatment of underground diseases more prominent than the ground above. There are three main diseases in the underground part: (1) root rot nematode disease. Pathogenic nematode damage to underground roots and underground stems mainly radish root. Spot irregular early dark brown small spots, slightly depressed, enlarged to dark brown spot after the internal dark brown caustic decay. Dwarf disease,