本文描述了采自海南省三亚市葱 ( Allium tistulosum)上的拟禾本科根结线虫 Meloidogynegraminicola。该种雌虫的会阴花纹多为上下长的卵圆形 ;线纹细弱 ,通常平滑连续 ,但在局部区域骤然出现将线纹截断的短线纹 ;侧区不明显 ;侧尾腺口小 ,相隔很近。雄虫的头冠与头区等宽 ,头区很低、光滑或有 2条不明显的环纹。二龄幼虫的尾相当长 ,尾透明末端的界限通常明显 ,尾端细长 ,末端呈细棍棒状。拟禾本科根结线虫在中国属首次报道 ,其寄主葱及其所属的百合科为拟禾本科根结线虫寄主植物的新纪录种和新纪录科 This article describes Meloidogynegraminicola collected from Allium tistulosum in Hainan Province. The females perineal pattern mostly up and down oval; fine lines, usually smooth continuous, but suddenly appear in the local area of ​​the line pattern truncated short line; side of the area is not obvious; Very close. Male crowns and head area crown width, head area is very low, smooth or there are two obvious ring pattern. The second-instar larvae have relatively long tail, the boundaries of the transparent end of the tail are usually obvious, the tail is slender, the end of the larva is in the shape of a stick-stick. The root-knot nematodes are reported for the first time in China. The host lions and their lily families are the new record species and the new record branch of host plants of the proposed root-knot nematode