SOME POSSIBILITIES OF VEGETATIVE PROPAGATION OF STRAWBERRY CULTIVARS IN VITRO

This work presents the production technology of five strawberry cultivars by micropropagation. Starting materials were taken in May or June from the stolons that were in the air and meristems of 0.5mm were isolated in the laboratory. The isolated strawberry meristems were cultivated in a medium containing macro and micro elements and phytohormones in different concentrations. The highest percentage of initiated culture was recorded by the cultivar Senga Sengana (81.48%) and the lowest by the cultivar Marmolada (48.00%). Optimal hormone balance for initiating culture strawberries was 1.0 mg / l BAP (Benzylaminopurine), 0,1 mg / l IBA (indole-3 -butyric acid) and 0.1 mg / l GA3 (gibberellic acid). After 50 days of cultivation in the culture, the formed shoots were transferred to medium for multiplication. The multiplication of isolated buds was achieved on the medium with phytohormones BAP and IBA. The highest multiplication index was recorded by the cultivar Senga Sengana (8.77) and the lowest by the cultivar Marmolada (5.42). When planlets reached a height of 10-12mm they were transferred to the rooting medium. The optimal concentration of phytohormones IBA for rooting of the strawberry cultivars was about 5 mg / l. Number of roots ranged from 5.09 for the cultivar Idea to 6.11 for the cultivar Senga Sengana. After two months the plants with developed roots were transplanted into peat briquettes. Adjustment by external conditions was conducted in greenhouses under a mist system. The reception was submitted well by the planted strawberries (90%). The results presented in this paper indicate that micropropagation can speed up the process of getting healthy and HIGH quality planting material ofstrawberries. The procedure for obtaining strawberries by micropropagation can be accelerated by proper selection of the combination and concentrations of phytohormones

Hemijsko proređivanje cvetova i plodova breskve

The paper presents an overview of the most important aspects of the chemical crop load regulation in the peach. Importance of crop load optimizing, strategies for flowers and fruits thinning (inhibition of flower induction, killing of flower buds, prevention of fruit set and stimulation of fruitlet abscission), the time of applications, concentration, efficiency and adverse effects of the most often used chemicals are discussed.Rad prikazuje pregled najvažnijih aspekata hemijskog regulisanja prinosa kod breskve. Obrađeni su: značaj dovođenja prinosa na optimalan nivo, strategije koje se koriste za proređivanje cvetova i plodova (kočenje indukcije cvetova, ubijanje cvetnih pupoljaka, sprečavanje zametanja plodova i podsticanje otpadanja mladih plodova), vreme aplikacije, koncentracija, efikasnost i štetni efekti najčešće korišćenih hemijskih materija

INFLUENCE OF CULTIVAR CHARACTERISTICS OF MUSCAT TABLE GRAPEVINE CULTIVARS (VITIS VINIFERA L.) ON GRAPE BRANDY COMPOSITION AND QUALITY

The goal of this paper has been to examine influence of a cultivar on the quality of a grape brandy produced from the muscat table cultivars: Demir kapija, Early muscat, Radmilovacki muskat, Banatski muskat, Muscat Hamburg, Smederevski muskat, Italy and Afuz-ali. In terms of the content of methyl alcohol as well as of the total evaporable ingredients, grape brandies made of the fermented grape mash of investigated cultivars meet the prescribed standards stipulated by the Rulebook on the Quality of Alcoholic Beverages