甘薯茎线虫属于垫刃目垫刃科的蔬菜害虫。此虫寄主较多,分布亦广泛。以成虫和幼虫危害大蒜、元葱、大葱及韭菜等一些葱属作物。也危害甘薯、芹菜、香菜、番茄、甜菜、豌豆及杂草。该线虫侵入大蒜植株后,多数引起植株叶片退绿变曲畸型,随后叶上产生明显黄斑或溃疡,甚至枯死。被害植株的茎有突起,肿胀,然后变软化而黄枯,腐烂。外部鳞片纵向或横向裂开,露出肿胀部分或多孔的内鳞片。严重时,整个蒜头溃化褐变腐烂,造 Sweet potato Stem nematode Belong to Dictyophora Division vegetable pests. This worm host more distribution is also widespread. To adults and larvae jeopardize garlic, onion, green onions and leeks and some other allium crops. Also endanger sweet potato, celery, coriander, tomato, beet, pea and weed. After the nematodes invaded garlic plants, most of them caused the green leaves of plants to degenerate and turn green, which then led to obvious macula or ulcers and even died. Stems of the victim plants have protuberances, swelling, and then become softened and yellowish, decayed. The outer scales are split longitudinally or transversely, exposing swollen sections or porous inner scales. Seriously, the entire garlic browning decay rotten, made