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Vector Relations

Host Effect on Acquisition and Transmission of Tobacco Ringspot Virus by Xiphinema americanum. J. M. McGuire, Professor, Department of Plant Pathology, University of Arkansas, Fayetteville, AR 72701; L. B. Douthit, Research Assistant, Department of Plant Pathology, University of Arkansas, Fayetteville, AR 72701. Phytopathology 68:457-459. Accepted for publication 29 August 1977. Copyright 1978 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-68-457.

Xiphinema americanum acquired tobacco ringspot virus (TRSV) from soybean as efficiently as from cucumber, but transmission to soybean was much less than to cucumber. Transmission to soybean was not affected by virus isolate or age of bait plants. Postacquisition feeding access to healthy cucumber did not improve the ability of X. americanum to transmit TRSV to soybean. There was more TRSV in the stomatodeum of nematodes after acquisition access to soybean or postacquisition access to cucumber than in nematodes that had postacquisition access to soybean. Tobacco ringspot virus was recovered from roots of soybean 32 days after mechanical inoculation.

Additional keywords: electron microscopy, virus replication.