Any of several small insects of the genus Phylloxera that are related to aphids,especially P. vitifoliae,a widely distributed species very destructive to grape crops.

• 根瘤蚜，葡萄根瘤蚜一种根瘤蚜属的小昆虫，与蚜虫有亲缘关系，尤指广泛分布的、对葡萄类作物极有害的一个品种葡萄根瘤蚜。