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山药、牛蒡的根结线虫为害损失大,在土层内分布深,其活动为害盛期与地下块茎(根)生长盛期基本同步。初侵染源主要有3个传播途径。夏季降雨量、茬口、土质是影响其发生程度的主要因子。控制为害的措施有轮作换茬、严把下种育苗关、清洁田园、大水漫灌、增施有机肥、应用高效、低毒的杀线虫剂。
The damage of root-knot nematode of yam and burdock was large and distributed deep in the soil. The peak of its activity was basically synchronous with the growth of underground tuber (root). The primary source of infection has 3 routes of transmission. Summer rainfall, stubble, soil quality is the main factor affecting the degree of occurrence. Harmful control measures are rotation cropping, seedling under strict control off, clean the pastoral, flood irrigation, organic fertilizer, the application of highly efficient, low toxicity nematicide.