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Resistance

Resistance to Cucumber Mosaic Virus Transmission by Aphids in Cucumis melo. H. Lecoq, Assistant de recherches, Station de Pathologie Végétale, I.N.R.A., Domaine Saint Maurice, 84140 Montfavet, France; S. Cohen(2), M. Pitrat(3), and G. Labonne(4). (2)Virologist, Virus Laboratory, Agricultural Research Organization, The Volcani Center, Bet Dagan, P.O.B. 6, Israel; (3)Assistant de recherches, Station d’Amèlioration des Plantes Maraichéres, I.N.R.A., Domaine Saint Maurice, 84140 Montfavet, France; (4)Assistant de recherches, Station d’Entomologie Agricole, I.N.R.A., E.N.S.A.M., 34000 Montpellier, France. Phytopathology 69:1223-1225. Accepted for publication 29 May 1979. Copyright 1979 The American Phytopathological Society. DOI: 10.1094/Phyto-69-1223.

Cucumber mosaic virus (CMV)-resistant Cucumis melo, PI 161375 (SC) when infected by CMV strain 14 (CMV-14) is a less efficient source of virus for Myzus persicae and Aphis gossypii than is the CMV-susceptible cultivar Cantaloup Charentais (CH). SC also is less susceptible than CH to CMV-14 transmission by M. persicae and virtually completely resistant to CMV-14 transmission by A. gossypii, although observed rates of transmission to CH by this aphid are very high. This resistance to CMV transmission by the melon aphid is not virus strain-specific and represents an additional form of resistance of SC to CMV.