红麻根结线虫分布普遍,为害严重,被害麻一般减产20—30%,严重的达 50%以上,甚至失收。根结线虫的寄主范围很广,但不同种或小种的根结线虫侵染不同种或品种的作物。这种寄生专化性直接关系到防治措施的运用。因此,对我国红麻上根结线虫的种类进行鉴定,并利用其专化性进行轮作防 Kenaf root knot nematode distribution is widespread, serious damage, maize generally cut 20-30% yield, a serious up to 50% or more, and lost. Root-knot nematodes host a wide range, but different species or races of root-knot nematode infestation of different species or varieties of crops. This parasitic specificity is directly related to the use of prevention and control measures. Therefore, the identification of species of root knot nematode on kenaf in our country and the specialization of rotation