o:3566 Influence of pre-harvest calcium spray on fruit quality of apple cultivars during cold storage en Abstract: Effect of pre-harvest calcium chloride (CaCl2) treatment on fruit quality attributes of three apple cultivars (‘Golden Delicious Reinders®’, ‘Granny Smith’ and ‘Red Chief ’) at harvest and after two and four months of cold storage during two consecutive years was studied. Trees were sprayed four times starting from the beginning of June at 20-day intervals. After harvest, fruits were stored in a regular atmosphere (RA) for further analysis. Measurements included fruit weight, weight loss, firmness, total soluble solids (TSS), titrable acidity (TA), total sugars (TS), TS/TA, total phenolic content (TPC) and antioxidant activity (AA). CaCl2 had a positive impact on fruit firmness of all cultivars in both years. Higher values of TSS and TS of ‘Golden Delicious Reinders®’ were determined in CaCl2 treatment in both years. TSS, TS and TS/TA were increased by prolonging storage in ‘Red Chief’ in CaCl2 treatment and control, in both years. TSS and TS proved similarly stable in ‘Granny Smith’ during storage in CaCl2 treatment and control in the second year of examination, but a decrease of TA and TS/TA has been detected in both years of storage. The AA of cultivars ‘Golden Delicious Reinders®’ and ‘Red Chief’ was stronger affected by the storage compared to CaCl2 treatment. Through a comprehensive analysis of apple cultivars it can be concluded that pre-harvest application of CaCl2 in cultivars ‘Golden Delicious Reinders®’ and ‘Red Chief ’ can be used to improve fruit quality during storage. Malus domestica; calcium-chloride; physicochemical traits of fruit; fruit storage 1552099 10.17221/127/2022-HORTSCI 2023-12-22T13:45:42.465Z 44 no 46 Boris Rilak Fruit Research Institute, Čačak, Republic of Serbia 0000-0003-4550-642X 46 Ivan Glišić University of Kragujevac, Faculty of Agronomy, Čačak, Republic of Serbia 0000-0002-0515-2762 46 Milan Lukić Institute for the Study of Herbal Medicine “Dr Josif Pančić”, Belgrade, Republic of Serbia 0000-0001-6771-2422 46 Tomo Milošević University of Kragujevac, Faculty of Agronomy, Čačak, Republic of Serbia 0000-0002-0402-3395 46 Jelena Tomić Fruit Research Institute, Čačak, Republic of Serbia 0000-0002-4813-8004 46 Mira Milinković Institute of Soil Science 0000-0001-5175-6842 application/pdf 256962 https://unilib.phaidrabg.rs/o:3566 no yes 1 70 92000001 71A05 Horticultural Science 2023