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Association of Xiphinema Species with Soil Type and Grapevines Infected with Tomato Ringspot Virus in Ontario, Canada. W. R. Allen, Agriculture Canada, Research Station, Vineland Station, Ontario L0R 2E0. L. W. Stobbs, J. G. Van Schagen, and B. A. Ebsary. Agriculture Canada, Reaearch Station, Vineland Station, Ontario L0R 2E0, and Agriculture Canada, Biosystematics Research Institute, Central Experimental Farm, Ottawa, Ontario K1A 0C6. Plant Dis. 72:861-863. Accepted for publication 6 May 1988. Copyright 1988 Department of Agriculture, Government of Canada. DOI: 10.1094/PD-72-0861.

Xiphinema rivesi was recovered from all nematode-containing samples taken from the root zone of grapevines either healthy or infected with tomato ringspot virus (TmRSV) in 21 European hybrid vineyards in the Niagara Peninsula. X. americanum was found in one of those samples. TmRSV-infected vineyards occurred on all soil types, and the virus was transmitted to bait plants grown in soil from infected vines. The results indicated that X. rivesi is the principal vector of the virus in the area studied and that this nematode is associated with a wider variety of soil types than was previously reported.