Comparative Resistance of Phaseolus vulgaris Cultivars to Clover Yellow Vein Virus Using Various Inoculation Methods. V. C. Dwadash-Shreni, Visiting Scientist, Plant Pathology Laboratory, Beltsville Agricultural Research Center, ARS, USDA, Beltsville, MD 20705. J. R. Stavely, Research Plant Pathologist, Plant Pathology Laboratory, Beltsville Agricultural Research Center, ARS, USDA, Beltsville, MD 20705. Plant Dis. 68:555-558. Accepted for publication 2 March 1984. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1984. DOI: 10.1094/PD-68-555.

Seventy-eight bean (Phaseolus vulgaris) cultivars were mechanically inoculated with clover yellow vein virus (CYVV) and maintained in a greenhouse. Twelve cultivars gave immune, necrotic local lesion, or tolerant reactions to CYVV. Individual plants of these 12 cultivars were inoculated with CYVV by an aphid vector (Myzus persicae) or by a hypodermic method. In seven of the 12 cultivars, receptivity varied from 12.5 to 100%, depending on the method of inoculation. The bean cultivar Navajo showed minimum (22.2 and 35.0%) whereas Rufus showed maximum (100 and 90.4%) receptivity to mechanical and aphid inoculations, respectively. The largest difference in percentage of infection occurred in Ouray (0.0, 41.1, 0.0%) and GN 1140 (0.0, 50.0, and 12.5%) for mechanical, aphid, and hypodermic inoculations, respectively. Cultivars Agate, Scout, Gala, Gloria, and GN UI 31 were immune to CYVV regardless of inoculation method. P. vulgaris cv. Monroe was identified as an effective local lesion host for CYVV.