Özet:

Russet is defined as a physical defect that begins in the epidermal and hypodermal cell layer during the initial stages of fruit development. Russeting fruits have no market value. This study was carried out to detect the effect of GA4+7 + BA on the formation of russeting on Starkspur Golden Delicious apple variety grafted on seedling rootstock. Three different GA4+7 + BA (21, 42 and 84 mg L-1) doses were used in the study. Applications were made three times for in 10-day intervals from the full bloom period. In both seasons, the relationship between application dose and russeting fruit ratio and application dose and russeting scale were found to be important. During the trial, the lowest fruit russeting rate was acquired from the application of 84 mg L-1, and the rusty fruit rate difference appeared between the years. As regards to the applications, the ratio of fruit russeting changed between 75.59% (control) - 26.90 (84 mg L-1) in 2015 and 78.84% (control) - 45.40 (84 mg L-1) in 2016.

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