The resecarch of growing area lemon prevalence of citrus yellow vein clearing virus (CYVCV) in Adana

This study was carried out to determine the spreading areas of Citrus yellow vein clearing virus disease (CYVCV) in three different areas including commercial lemon orchards, citrus production and collection plots of C.U. and backyards around the C.U. in four towns of Adana. Surveys were carried out on 134,801 citrus trees in total of 830 ha, 27,802 of backyards, and total of 61,178 citrus trees on the streets and boulevards. The citrus varieties on which macroscopic symptoms of the disease were observed were Interdonato, Yediveren and Kutdiken (C. limon Burn f.) Lemons and Citrus aurantium L. which is used as rootstock. The main symptoms determined in this study were yellow colored and line shaped discoloration on main and lateral veins, shrinking on main veins of leaves, reducing in leaf size, cubby shape in leaves towards inside and outside, "V" shaped indents on leaf borders, "gondol" shaped leaves, and wet appearance on back vains of leaves. Dryings were also determined on trees effected by the disease severely. As a results of surveys, 0.006 % of infection rate in commercial orchards and 9.46 % of infection in Çukurova Universtiy plots were detected. Except the city center of Adana, the disease was detected in only one orchard in Yuregir town. Symtoms were detected on total of 859 citrus trees in around C. U. and city center, and it was detected in this study that the disease has spread out of the disctrict of the C.U.