Those diseases which had been formerly found but not identified in detail, such as tobacco Blank death, Black root rot, Wild fire, Angular spot and root-knot nematode were studied more thoroughly.
This paper reviewed the classification status, occurrence regularity, damage symptom of vegetable rot-knot disease and analyzed the control measures.
对蔬菜根结线虫的分类学地位、发生规律、为害症状进行了总结归纳，对多种防治措施进行了分析。
3
The nematodes that limit sweetpotato production are sweetpotato root-knot and rot-knot nematode. The intergrated methods are used to control the disease in sweetpotato production.