Uticaj letnje rezidbe na vegetativni i reproduktivni potencijal sorti jabuke Jonagold i Greni Smit

The effect of single and double summer pruning on major parameters of vegetative and reproductive potentials of apple cvs Jonagold and Granny Smith under the spindle and regular palmette systems with angled branches. Significant to very significant effect of this pomotechnical measure on growth, cropping and fruit quality under both training systems under identical growing conditions. Due to the aforementioned, summer pruning ought to be regularly performed in highly intensified plantings, with intensity and time of performance adjusted both to the biological particularities of certain cultivars and the employed growing system.U radu su prikazani dvogodišnji rezultati ispitivanja uticaja zelene rezidbe na vegetativni i reproduktivni potencijal jabuke Jonagold i Greni Smit. Uporedo su praćena stabla kontrolne varijante (bez primene zelene rezidbe). Zelena rezidba na stablima navedenih sorti jabuke izvođena je u prvoj polovini juna i polovinom avgusta (prva varijanta), odnosno samo u prvoj polovini juna (II varijanta). Utvrđeni su pozitivni efekti zelene rezidbe na ispitivane parametre, zbog čega se preporučuje njeno redovno izvođenje kod stabala u rodu. Dvokratna zelena rezidba dala je nešto povoljnije rezultate, što ne mora biti pravilo za sve sorte i različite agroekološke uslove

Effect of chemical and hand thinning young apple tree on yield and fruit quality

Abstract The aim of this study was to evaluate the effectiveness of two thinning agents in relation to hand thinning in reducing fruit set in 'Gala' and 'Granny Smith' young apple trees. The agents tested were NAA (two concentrations) and carbaryl. Chemical and hand thinning showed greater influence on reduction fruit set in cv. 'Granny Smith' than in cv. 'Gala'. Fruit thinning significantly increased the average fruit size, especially in cv. 'Granny Smith'. In cv. 'Gala', similar effect was only observed in treatment with higher concentration of NAA. Fruit thinning did not influence on other fruit quality parameters for both cultivars. A high return bloom was recorded in treatments with thinning fruit in comparison to unsprayed treatment. It was higher in cv. 'Granny Smith' than cv. 'Gala&apos