International Scholars Journals

International Journal of Agricultural Economics and Extension

International Journal of Agricultural Economics and Extension ISSN 2329-9797 Vol. 10 (7), pp. 001-004, July, 2022. © International Scholars Journals

Full Length Research Paper

The effect of gibberellins on russeting in golden delicious apples

F. Nejatzadeh Barandoozi^1* and A. Talaie²

¹Department of agricultural engineering, Islamic Azad University of Khoy, Iran.

²Department of agricultural engineering, Islamic Azad University of Tehran, Iran.

Accepted 12 June, 2021

Abstract

Russet on apples, Malus domestica Borkh and other fruits results in lowered fruit quality and substantial economic losses to growers. In this study we investigated the effect of GA₃ and GA₄₊₇ on russeting. Russeting index of fruits were estimated at harvest. Apple trees, twenty years old Golden Delicious was sprayed with GA₃ at the concentrations10-20 mgL^-1 and GA₄₊₇ at 5-10 mgL^-1 during petal-fall at 7-10 days 3 time again. All applied concentration of GA₃ and GA₄₊₇ reduced russeting in Golden Delicious cultivar significantly and significant difference was found between GA₃ and GA₄₊₇ actions. The application of GA₃ or GA₄₊₇ caused fruits to shift to elongated shape due to increase of L/D ratio. The application of GA₃ or GA₄₊₇ caused to increase the weight of Golden Delicious fruit significantly. When GA₃ or GA₄₊₇ were separately sprayed on Golden Delicious, it resulted in considerable decrease in russeting neither return bloom nor were fruit set influenced by treatment.