Effect of Naphthalene Acetic Acid Treatment on the Prevention of Trunk Sprout Formation in Plum (cv. Black Amber)

Trunk sprouts are removed from plants due to the long juvenile period and lengthy internodes. in addition, pruning costs are increased significantly, especially in the form of bush cultivation. in this study, the effects of naphthalene acetic acid (naa) treatments at different levels on trunk sprout formation was investigated in ‘black amber’ plum cultivar were investigated in 2015 and 2016 years. as a result of the study, it was determined that naa application had a preventive effect on the formation of trunk sprout. however, no difference was detected between naa application doses. analyzing the averages of two-year data, the number of trunk sprout per plant was approximately 9 in the control group while this value decreased to 2 in the naa application groups. high naa doses led to blighted branches and gummosis in the second year. as a result, biennial low naa dose applications, have been found promising in terms of decreasing the trunk sprout formation.