Evaluation of the presence and symptomology of viruses in commercial quince orchards in Turkey
Abstract
Turkey is the biggest quince (Cydonia oblonga Mill.) producer country in the world with a production of about 120.000 tons/year. Virus diseases Apple stem pitting virus (ASPV), Apple stem grooving virus (ASGV) Apple mosaic virus (ApMV) and Apple chlorotic leaf spot vius (ACLSV) are known as viral pathogens that can affect quality and quantity of quince production. This study was carried out in the Mediterranean region of Turkey between 2006 and 2008. The study was based on a survey with symptomatological observations and the detection of viruses by DAS-ELISA and/or RT-PCR techniques. During the survey, 33 commercial orchards in five different counties were visited and 115 samples were collected and examined. Laboratory results showed that 27.82% of the samples were infected by either single or mixed infection of any tested viruses. Single infection of ASPV, ACLSV and ASGV were found in 12.17%, 5.21% and 2.60% of the samples, respectively, while mixed infections of ASPV+ASGV, ASPV+ACLSV, and ASPV+ASGV+ACLSV were in 2.60%, 3.47% and 1.73% of the samples, respectively.ApMV was not found in any tested samples.Infected trees were marked and observed monthly during the whole vegetative period for two years. The observed symptoms were evaluated in accordance with the laboratory results. During the study; leaf mosaics, leaf deformation, fruit malformation, gummy fruit, dwarfing of the tree, bud-union abnormalities and trunk deformations were observed.
Keywords: Quince, ApMV, ACLSV, ASPV, ASGV, Turkey
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2010-09-30
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