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杉木(Cunninghamia lanceolata)根部,首次发现半穿刺线虫寄生,经柯赫法则(Koch’s postulates)验证,病原线虫是(Tylenchluus semipenetrans Cobb)。雄成虫线形,长度为367.2(303—390)um,吻针和食道极度退化,单精巢,交合刺长15um,具引带,无交合繖,排泄孔位于虫体中部或稍后(PE=60％),雄成虫少见。雌成虫单个或成群寄生根上,虫体前端约占体长(40—50％)伸入根部周皮层内,露出根外的虫体逐渐膨大成囊状或袋状,虫体长390.3(334—449)um,排泄孔位于阴门稍前(PE=80—90％)。孔口能分泌出小液滴,阴门位于虫体90％处,无肛门,尾端短且直伸向腹面,单卵巢,折叠卷曲,雌成虫行孤雌生殖。
The roots of Cunninghamia lanceolata, for the first time, were found to be parasitized by the semi-pierced nematode, which was verified by Koch’s postulates as Tylenchluus semipenetrans Cobb. Male adult linear, length 367.2 (303-390) um, extreme deterioration of the needle and esophagus, single testis, cross spines 15um, with lead, no cross umbrella, excretory hole in the middle of the worm or later (PE = 60 %), Male adult rare. Female adult single or groups of parasitic roots, the front of the body about the body length (40-50%) into the root of the circumferential cortex, exposing the root of the worms gradually expand into a sac or pouch-shaped, length 390.3 (334 -449) um, excretion hole slightly before the vulva (PE = 80-90%). The orifice can secrete small droplets, the vulva is located 90% of the parasites, no anus, short tail and straight stretch to the ventral, single ovary, folding curly, female parthenogenesis.