花生根结线虫病是检疫对象,过去在我省很少发生。最近,笔者在沿黄地区农业调查中,在开封县的万隆、范村等乡均发现有花生根结线虫病发生。据当地农民反映,1988年仅点片发生,1989年不足百亩,1990年发生面积已达600多亩,一般减产20%～30%,重者达70～80%,甚至绝收。发展之快和危害之重,令人担忧。主要症状:根结线虫从花生的根端侵入后,使根逐渐形成纺锤状或不规则的虫瘿,使整个根系形成乱发似的须根团。线虫也可侵染荚果,荚壳上的虫瘿呈褐色疮痂状突起,幼果上的虫瘿乳白色略带透明状。花生 Peanut root knot nematode disease is a quarantine object, in the past rarely happened in our province. Recently, the author found that peanut root-knot nematodes disease occurred in the villages of Bandung and Fancun in Kaifeng County in the agricultural survey along the Yellow River. According to the reports of local peasants, only the spot took place in 1988, less than 100 mu in 1989 and the area in 1990 reached 600 mu, with a general reduction of 20% to 30% and a severe case of 70-80%. The rapid development and the heavy damage are worrisome. The main symptoms: Root-knot nematode invaded from the root end of peanuts, the root gradually formed spindle-shaped or irregular worms, so that the entire root formation of hair-like whisker group. Nematodes can also invade the pods, the bugs on the shell of the pods are brown, scablike protrusions, and the larvae on the young fruit are slightly opaque. peanut