Effect of gibberellinic acid ga 4+7 on the reduction of the degree of damage of Golden Delcious clone B fruit with russet

Abstract

The experimental plot is placed in apple orchard during the 2021 - 2022 years. The object of the research was the apple trees Golden Delicious clone B variety, grafted on M 9 rootstock. In order to prevent the formation of russeting on Golden Delicious Clone B apple fruit, various variants were studied: 1. Control - no treatment; 2. Gerlagib LG - 300 ml/ha; 3. Gerlagib LG - 400 ml/ha; 4. Gerlagib LG - 500 ml/ha. The growth regulator Gerlagib LG, a product of the company "L.Gobbi" SRL, Italy, containing 10.5 g/l gibberellinic acid GA4+7, which was applied to the trees 4 times by foliar spraying. The first treatment was carried out at the end of flowering and the next 3 treatments at 7-10 days interval after the previous one.