Effect of naphthaleneacetic acid (NAA) on prehavest drop of Gala Must apple variety

Abstract

Livada experimentală a fost fondată în anul 2006 în întreprinderea SRL „Dacfruct”. Ca obiect de studiu în experiment a fost soiul Gala Must altoit pe portaltoiul M9. Pomii au fost conduşi ca fus subțire ameliorat. Distanța de plantare 3,5x1,2 m. Cercetările s-au efectuat pe parcursul anului 2013. Scopul acestor cercetări au fost de a evalua eficacitatea regulatorului de creştere Obsthormon 24a la prevenirea căderii fructelor din coroană. Ingredientul activ a fost ANA, care s-a pulverizat o singură dată înainte de perioada de recoltare. În perioada cercetărilor s-a investigat cantitatea de fructe căzute sub pom şi ponderea lor la recolta de fructe. S-a stabilit că un tratament cu Obsthormon 24a în doza de 300 ml/ha are un efect pozitiv asupra căderii premature a fructelor şi calității lor.

The experimental plot is placed in the orchard “Dacfruct” Ltd. founded in 2006. The study subject of the experience was Gala Must apple variety grafted on M 9. The trees were trained as slender spindles. The distance of plantation is 3.5 x 1.2 m. The research was conducted during the period of 2013 year. The aim of this study was to evaluate the effectiveness of grower regulator Obsthormon 24a in reducing fruit drop of apple trees. The tested agents were NAA, which was sprayed in one time in preharvest period. During the research, it was studied the quantity of dropped fruits under the trees and percentage of total fruit yield. It was established that, one treatment with Obsthormon 24a in dose of 300 ml/ha have a significant effect on fruit drop and their quality