The disease indices of tomato root knot nematode was the highest while the soil water percentage was 8.98% and then decrease while the soil water percentage was higher than 26.27%.
土壤含水量为8.98％番茄根结线虫病病情最重，土壤含水量高于26.27％，番茄感染根结线虫病病情较轻。
Field experiments were conducted with 6 selected nematicides for pepper root - knot nematode.
研究选用了6种常用杀线剂对胡椒根结线虫病进行了田间药效试验。
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.
对过去虽有发现，但无详细鉴定的烟草低头黑病、烟草根黑腐病、烟草野火病、烟草角斑病、烟草根结线虫病等进行了研究。
Owing to the root-knot nematode is so small, can not be cultured, has a long generation, it is difficult to do research in vitro in interaction with the host.
由于根结线虫体积小，不能人工培养，世代长等难于进行体外与宿主的相互作用方面的研究，进展一直很缓慢。
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.
甘薯生产上主要采用综合防治方法进行防治，其中选育抗病品种最为经济有效。
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.
甘薯生产上主要采用综合防治方法进行防治，其中选育抗病品种最为经济有效。
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