葡萄根瘤蚜Phylloxerα vitifollii(Fitch),属同翅目,瘤蚜科。国内分布于山东(烟台、福山)陕西(武功)和辽宁。此虫单食性,仅为害葡萄属植物,是葡萄的毁灭性害虫。美洲系和欧洲系品种葡萄的被害征状不同。为害美洲系葡萄品种时,既为害根部又为害叶部。叶部受害后,在叶背形成许多粒状虫瘿。根部受害,以新生须根受害最烈,近地表的主根也可受害;受害征状,在须根端部膨大成比小米粒稍大的略成菱角形的瘤状结,虫体多在凹陷的一侧;在侧根和主根上则形成较大的瘤状突起,虫体多在突起的缝隙处。经过雨季,根瘤常溃烂,并使皮层开裂、剥落、维管束破坏, Phylloxera vitifollii (Fitch), belonging to Homoptera and Aphididae. Domestic distribution in Shandong (Yantai, Fukuyama) Shaanxi (Wugong) and Liaoning. This pest is a monogamous, only harmful grape plants, is a devastating pest of grapes. American and European grape varieties of different symptoms of victimization. Damage to the Americas Department of grape varieties, not only harm the roots but also damage the leaves. Leaf damage, in the back of the leaf to form many granular insects. Root damage, the most vulnerable to nascent fibrous roots, near the surface of the main root can also suffer; victim symptoms swollen at the tip of the fibrous root slightly larger than the slightly larger water chestnut knot-like knots, parasites and more in the hollow one Side; in the lateral roots and the main root is formed on the larger knob-like protrusions, parasites and more in the protruding gap. After the rainy season, root nodules often ulceration, and the cortex cracking, peeling, vascular damage,