Home About Us Search Newsletters Weather / Climate Viticulture Pest management Scouting guide Publications Calendar of events Industry links Contacts Download Adobe Acrobat Reader to view pdf files.	Grape phylloxera Rufus Isaacs, MSU Entomology Home > Scouting guide> grape phylloxera Phylloxera are small, yellow, aphid-like insects that live on vine roots and leaves. The root form stunts growth of susceptible vines and can kill them. This pest is effectively managed by using resistant or tolerant rootstocks. In the eastern United States, foliar damage is seen on wild grape, labrusca and some vinifera vineyards as raised galls on the undersides of leaves (see photo above). The root form of this pest prefers vines growing in heavy clay soils. Phylloxera damage the roots of vines by feeding on growing rootlets, which then swell and turn yellowish. The swellings are often hard to see on mature roots. Necrotic spots (dead areas) develop at the feeding sites. Labrusca grapes can tolerate phylloxera feeding on roots, particularly in well-watered vineyards. Additional information Recommendations from the Michigan Fruit Management Guide Phylloxera nymphs on a root.
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Funding for this web site provided by Project GREEEN, American Farmland Trust, EPA Region 5's Strategic Agricultural Initiative program, The National Foundation for IPM Education, the Center for Agricultural Partnerships and the MSU Integrated Pest Management Program in collaboration with MSU Extension and the Michigan Agricultural Experiment Station. Partially support from NC-IPM Center. 05/26/11 Contact: E. Haney