The effects of alternative spray programs, NaHCO3/K2SiO3 + sulphur, KH2PO4/di - 1 - p – menthone, and a conventional spray program, penconazole/sulphur, as well as various levels of shoot toppings (to the 1st, 3rd, and 5th buds) on powdery mildew disease [Uncinula necator (Schw.) Burr.] and grape quality were investigated in this study. | Research Article Turk J Agric For 34 (2010) 213-223 © TÜBİTAK doi: Effects of alternative spray programs and various combinations of green pruning on powdery mildew [Uncinula necator (Schw.) Burr.] in Karasakız (Kuntra) grape cultivar İsmet YILDIRIM1,*, Alper DARDENİZ2 1 Çanakkale Onsekiz Mart University, Faculty of Agriculture, Department of Plant Protection, 17020, Çanakkale - TURKEY 2Çanakkale Onsekiz Mart University, Faculty of Agriculture, Department of Horticulture, 17020, Çanakkale - TURKEY Received: Abstract: The effects of alternative spray programs, NaHCO3/K2SiO3 + sulphur, KH2PO4/di - 1 - p – menthone, and a conventional spray program, penconazole/sulphur, as well as various levels of shoot toppings (to the 1st, 3rd, and 5th buds) on powdery mildew disease [Uncinula necator (Schw.) Burr.] and grape quality were investigated in this study. The study was carried out on grape variety Karasakız (Vitis vinifera L.) during 2003 and 2004 growing seasons. The effectiveness of NaHCO3/K2SiO3 + sulphur, KH2PO4/di - 1 - p - menthene alternate spray programs against powdery mildew was found as and on leaf and and on bunch in the 2003 vegetation period, which were close to the results ( on leaf, on bunch) obtained with the conventional control program (penconazole/sulphur). In 2004, NaHCO3/K2SiO3 + sulphur () was more effective for the control of leaf powdery mildew than penconazole/sulphur (). In addition, it also exhibited a similar effect on bunches. NaHCO3/K2SiO3 + sulphur and penconazole/sulphur treatments showed positive effects on the yield and quality of grapes. All spray programs demonstrated a better performance in the vineyards where pruning was practiced from the 1st and 3rd buds after the last bunch of the grapes rather than from the 5th bud. According to the results of the study, NaHCO3/K2SiO3 + sulphur spray program could be used in combination with the green pruning from .
