鲁西山药种植面积近20000hm2,主要分布在济宁、菏泽、临沂等地的部分县区镇,由于种植区域相对固定,且单一种植,很难进行改茬轮作,随着山药栽培面积的扩大,山药根结线虫病的发生蔓延逐渐加重,轻者减产20%~30%,重者减产60%以上,并且商品品质明显下降,严重制约着本地山药生产的进一步发展。 Luxi yam cultivation area of ​​nearly 20000hm2, mainly in Jining, Heze, Linyi and other parts of the county town, due to the relatively fixed planting area, and single planting, it is difficult to crop rotation, with the expansion of yam cultivation area, yam The incidence of root knot nematode disease gradually increased, the light cut 20% to 30%, heavy cut 60% or more, and the quality of goods decreased significantly, severely restricted the further development of local yam production.