@article{article_48722, title={Investigations on the effect of Gibberellic acid (Ga_{3}) applications to the damage of European Grapevine Moth (*Lobesia botrana *Den.-Schiff.) on the seedless grapes in the Aegean region.}, journal={Plant Protection Bulletin}, volume={38}, year={1998}, author={Altınçağ, R. and Altındişli, F.Ö.}, keywords={Gibberellik asit; üzüm; Gibberellic acid; grape; Lobesia botrana}, abstract={Trials were carried out during 1992-1994 in Viticulture Research Institute in Manisa, to search for the effect of Gibberellic acid(GA3) treatments having various goals in the vineyards against the damage of the European grapevine moth( *Lobesia botrana *** ** Den. Schiff.). Trials were designed in randomized blocks of 4 treatments and 4 replications in the first, 4 treatments and 5 replications in the second and third years. The treatments were planned as I (3 GA3 applications for table grapes), II (2 GA3 applications for table grapes), III (1 GA3 application for raisin) and IV (no treatment). None insecticide was applied in the plots having six vinestocks. First treatments were done in 30.04.1992, 29.04.1993 and 03.05.1994 at the stage of 2-4 cm bunch longevity, second treatments in 08.06.1992, 27.05.1993 and 27.05.1994, at the stage of 60-80% flowering, third treatments in 23.06.1992, 15.06.1993 and 06.06.1994 at the stage of 3-5 mm grapeberry diameter, respectively. Counts were done in 4 vinestocks placed in the middle of each plot. Evaluations were done by counting the damaged berries in 16 bunches collected from 4 vinestocks and 4 directions of the inner parts of each vinestock per plot. The average total berry number in the treatments were separately found, by counting the total berry number in 5 bunches from each treatment (totally 4x5=20 bunches). The average damage rates were calculated to be 1.4914% for I. treatment, 0.9800% for II., 1.1694% for III., and 1.0626% for IV. in 1992; respectively 1.5520, 1.2941, 1.5490 and 2.7240% in 1993; 1.1241, 2.5510, 2.7727 and 1.4510% in 1994. Infested bunch rates were 37.50, 67.50 and 72.50% for I. treatment; 43.75, 47.50 and 67.50% for II.; 38.75, 80.00 and 95.00% for III.; 45.00, 90.00 and 71.25% for IV. in 1992, 1993 and 1994, respectively. The bunch rates having more than 10 damaged berries in the infested bunches were 15.00, 37.03 and 12.06%; 15.00, 42.10 and 38.88%; 7.50, 40.00 and 34.21%; 11.25, 87.67 and 14.03% in the treatments in 1992, 1993 and 1994, respectively. The maximum damaged berry numbers in infested bunches in four treatments were respectively 26, 31, 22 and 56 in 1992; 84, 100, 44 and 67 in 1993; 31, 137, 88 and 22 in 1994.}, number={3}, publisher={Zirai Mücadele Merkez Araştırma Enstitüsü} }