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Fruit Varieties Journal
(Fruit Var J)

American Pomological Society

Volume 50 Number 3 Article 26 Pages: 156-159
Year 1996 Month 7
Title: Sources of Bacterial Spot Resistance in Plum Cultivars
Authors: O.M. Martins and M.C.B. Raseira
Bacterial spot (Xanthomonas campestris pv. pruni) resistance in Japanese and European type plum cultivars was evaluated under greenhouse conditions by means of a pressure infiltration inoculation procedure. Cultivars 'Pluma 7' (susceptible) and 'The First' (resistant) were used as standards for comparison to the genotypes inoculated with an inoculum concentration of 1 108 cfu/ml. Resistance levels were rated using a scale based on percentage of affected leaf area. Cultivars 'Harry Pickstone,' 'Carmesin,' 'Wickson,' frontier,' 'Rosa Mineira,' 'Reubennel,' 'Amarelinha' and 'Santa Rosa' were highly susceptible while 'Wade,' 'Ozark Premier' and 'Methley' were moderately resistant. 'Bruce,' 'Stanley,' 'Burbank,' 'D'Agen' and 'America' were selected as major sources of resistance to the pathogen.

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