Effects of Pre-harvest Applications of Aminoethoxyvinylglycine and Oxalic Acid on Biochemical Compounds and Fruit Quality of 'Big Bang' Nectarine Variety

The main objective of this study was to compare the effects of aminoethoxyvinylglycine (AVG) and oxalic acid (OS) treatments in equal doses at two different times and single dose at one time in nectarine cultivar 'Big Bang'. In particular, changing air temperatures due to climate change have increased the possibility of technological applications with different methods. Therefore, AVG (125 ppm) and OS (1 mM) applications 14 days before the estimated harvest, 62.5 ppm AVG 14 days before the estimated harvest +62.5 ppm AVG 7 days before the estimated harvest, and 0.5 mM OS 14 days before the estimated harvest +0.5 mM OS 7 days before the estimated harvest were sprayed on both the fruits and leaves of the trees. The effects of treatments at the average harvest time were examined in terms of fruit quality, ethylene production, and respiration rate as well as biochemical contents in fruit and leaves. As a result of the analyses and evaluations, it was determined that the effective doses of AVG (125 ppm) and OS (1 mM) and equal amounts of these doses in two applications before harvesting did not reduce the ripening delaying effect of AVG and OS, and increased the fruit quality components for both producers and consumers.