Effects of Macroposthonia xenoplax on the Growth of Concord Grape

G. S. Santo, W. J. Bolander


Concord grape (Vitis labrusca) plants were inoculated with Macroposthonia xenoplax at levels of 100, 1,000, and 10,000 nematodes. After 4 months, plants inoculated with 10,000 M. xenoplax were stunted, and root systems were darker and had fewer feeder roots than those in other treatments. The lower nematode inoculation levels suppressed top growth but did not affect root growth. M. xenoplax reproduced well on Concord grapes. Key Words: Vitis labrusca, ring nematode, reproduction.

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