Definition of potato virus Y strains by some solangceous species

Abstract

By their differing reactions, Lycium halimifolium, L. rhombifolium, Physalis floridana, and Capsicum annuum distinguished between four strains of potato virus Y, P. floriduna giving the best differentiation. The avirulent strain produced no symptoms in L. rhombifolium and P. floridana, and virus development was restricted in P. floridana. The two varieties of C. annuum were immune to virus Y except for the tolerant reaction of one to a virulent strain. Nicotiana glutinosa indicated virulence of a Y strain when inoculated concurrently with virulent X strain.