Aminoethoxyvinylglycine (AVG) Uygulamasının Red Chief ve Braeburn Elma Çeşitlerinde Hasatönü Meyve Dökümü ve Meyve Kalitesi Üzerine Etkisi

Abstract

The study was carried out in 2017 in the semi-dwarf apple orchard established in 2010 in Kemalpaşa village in Tokat province in order to determine the effect of AVG application in different concentrations on the pre-harvest fruit drop and fruit quality of Red Chief and Braeburn apple cultivars. In the study, 7 years-old apple trees of Red Chief and Braeburn cultivars grafted on MM106 rootstock were used. AVG, at 0, 75, 150 and 225 mg L-1 combined with a Regulaid’ surfactant at 0.1% v/v, was applied to the trees before anticipated harvest. Fruit drop ratio, which varied depending on the cultivar, was lower in the AVG treated trees, and the effect of the application concentration was significant. AVG application was effective in maintaining the fruit retention force. The significant differences in fruit retention force occurred between application concentrations. It was determined that the the fruit retention force was higher in the fruits belonging to the Breaburn cultivar. The effect of AVG on fruit size, SSC pH and acidity rates varied depending on the variety. There was no significant differences in fruit firmness and starch index between cultivars. AVG application increased the fruit firmness and decreased the amount of starch both cultivar. As a result, of this study, it has been revealed that AVG can be used effectively in preventing pre-harvest fruit drop in Redchief ve Braeburn.