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Evaluations of apricot trees infected by Candidatus Phytoplasma prunorum for horticultural characteristics
(2009) Gazel, Mona; Caglayan, Kadriye; Serce, Cigdem Ulubas; Son, Levent
Apricot, Prunus armeniaca L., is an important stone fruit species in Turkey. The Mediterranean coastal area in Turkey has advantageous climatic conditions for early table apricot production. New orchards with both local and foreign cultivars are being established in this region. The disease caused by phytoplasma is a critical threat for apricot growers. In this study, pomological data were collected from three apricot trees (cv. 'Precoce de Tyrinthe') that are infected by Candidatus Phytoplasma prunorum disease and from healthy plants under field conditions. The variables evaluated included yield, fruit width, length, height and weight, seed weight, seed/fruit ratio, soluble solids and acidity between 2004 and 2007. Analyses of variance indicated that all infected trees had lower yield when compared to the uninfected trees for four experimental years. The reduction in yield reached up to 77% in some cases. Significant differences were also recovered for variables for infected versus control comparisons. In some cases, the means of the trees also differed among infected ones. The results suggested that Ca. Phytoplasma prunorum negatively affects the 'Precoce de Tyrinthe' apricot for both yield and pomological characteristics in different ratios. Copyright © 2009 Bucharest University.