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Susceptibility of apricot cultivars to artificial inoculation with plum pox potyvirus and use of ELISA for its evaluation



Susceptibility of apricot cultivars to artificial inoculation with plum pox potyvirus and use of ELISA for its evaluation



Bulletin OEPP 24(3): 771-774



The susceptibility to plum pox potyvirus (PPV) of 13 apricot cultivars and two hybrids was studied under isolated conditions in the experimental orchard of the Research Breeding Station at Vesele from 1989 to 1993 after artificial inoculation of the trees. The plants were inoculated in the nursery in 1988 by chip-budding with a local source of virus and then planted into the field trial. First symptoms of plum pox appeared on the leaves in 1990. Reinoculation of symptomless trees was done in summer 1991. By 1993, plum pox had totally invaded some apricot trees of the most susceptible cultivars (Madarska, Velkopavlovicka, Yisinevskij rannij, Ligeti orias, Bergeron, Vesna and Vestar). Uninoculated control trees remained symptomless despite the proximity of diseased trees and the fact that the orchard was not sprayed with insecticides during the period of experiment. Cvs Julskij, Veecot. Vegama and Veharda remained free from plum pox symptoms on leaves and fruits. In 1993-05/06, the trees were assayed for the presence of the PPV antigen by ELISA. Leaf samples from 33 trees showing symptoms were positive. Samples prepared from the healthy tissues of leaves with symptoms were negative. Other trees (indexed by ELISA) growing in the neighbourhood of diseased trees in the period of 5 years were visually and ELISA negative.

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Accession: 002706062

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DOI: 10.1111/j.1365-2338.1994.tb01095.x


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