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Transmission of Tomato Ringspot Virus to Apple Rootstock Cuttings and to Cherry and Peach Seedlings by Xiphinema rivesi. Lyle B. Forer, Chief Plant Pathologist, Pennsylvania Department of Agriculture, Harrisburg 17110-9408. Charles A. Powell, Plant Pathologist, Pennsylvania Department of Agriculture, Harrisburg 17110-9408, and Richard F. Stouffer, Professor, Department of Plant Pathology, Fruit Research Laboratory, Biglerville, PA 17307. Plant Dis. 68:1052-1054. Accepted for publication 8 May 1984. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-1052.

Apple and geranium strains of tomato ringspot virus (TmRSV) were transmitted by Xiphinema rivesi to seedlings of Wisconsin SMR-18 cucumber, Samsun tobacco, Halford Peach, and mazzard cherry and to rooted cuttings of apple rootstocks M9, M7A and MM106. The virus was detected by enzyme-linked immunosorbent assay (ELISA), primarily in the roots of the woody test plants after 8 wk of exposure to viruliferous nematodes. Woody plants were then stored under refrigeration (02 C) for 14 wk to induce dormancy. The virus was not detected in the roots of any more test plants after dormancy but was recovered from leaves and roots of infected apple and peach plants by both infectivity assay and ELISA. All TmRSV-infected apple plants remained symptomless; the infected peach seedlings displayed foliar symptoms of peach yellow bud mosaic regardless of the TmRSV strain.