Effects of Pruning Combined with The Application of Silver Nanoparticles on Fruit Quality of Oranges with Greening Disease

Abstract

     This study was about the effects of pruning combined with the application of silver nanoparticles on fruit quality of oranges with greening disease. The experiment plan used 2×3 Factorial in Completely Randomized Design. The first factor consisted of pruning and no pruning. The second factor consisted of 3 types of silver nanoparticles injections: 1. Only one injection, 2. Two injections 7 days apart, and 3. Two injections 14 days apart. As a result, pruning affected to fruit drop of oranges which was less than no pruning, with an average of 8.68% and the oranges contained vitamin C which was as high as 21.25 mg per 100 g of fresh weight. When considering the mutual influences between the factors, it was found that pruning combined with silver nanoparticles had no effects on fruit drop, circumference, amount of total soluble solid (TSS), amount of Titratable acidity (TA), ratio of TSS/TA and the amount of vitamin C. However, pruning combined with a onetime injection of silver nanoparticles resulted in the yield of oranges with the maximum fresh weight of 76.36 g/fruit.