Grapevines in central Anatolia region of Turkey were surveyed for the prevalence of grapevine leafroll viruses. The field study and collection of samples were conducted in nine major grapevine‐growing areas. Samples collected from 622 vines were tested for Grapevine leafroll‐associated virus 1, 2, 3 and 7 (GLRaV‐1, ‐2, ‐3 and ‐7). According to diagnostic tests and surveys, 27 of 41 cultivars and 95 of 622 samples (15.27%) were found to be infected at least one virus. GLRaV‐1 (8.36%) was found to be the most frequently encountered virus associated with leafroll disease of grapes, followed by GLRaV‐3 (5.78%), GLRAV‐7 (3.86%) and GLRAV‐2 (2.41%).
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Akbaş et al. (2007) studied this question.
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