Effect of pruning severity on yield and fruit quality of two mandarin cultivars
The present work was carried out during two consecutive seasons (2014 and 2015) in a private orchard located in Wadi Almollak, Ismailia Governorate, Egypt on 5-year-old trees. The study involved two mandarin cultivars, namely Murcott and Fremont (Citrus reticulata Blanco) grown on Volkamer lemon (Citrus volkameriana Ten. and Pasq.) rootstock. Murcott trees are prone to alternate bearing that can result in tree death as well as small fruit size. Pruning could reduce the crop size and the remaining crop should show an increase in fruit size. The small fruit size of Fremont may make it unsuitable for cooler production areas. The trees of the two mandarin cultivars were pruned during the growth part of the season in January such that 25 (light pruning), 50 (moderate pruning) and 75% (heavy pruning) of the two-year-old shoots remained to bear the total yield tree-1, while the control plant was not pruned. The results showed that Fremont mandarin showed the higher fruit yield compared to Murcott. Light pruning (25%) caused a significant higher yield than the control. Moderate pruning (50%) gave the highest increase in yield in the two seasons. Fremont TSS (%) and TSS/acid ratio was superior to those of Murcott in the control plant. All pruning treatments significantly increased TSS (%) and TSS/acid ratio in both Fremont and Murcott mandarin fruit. The results showed that light and moderate pruning of Murcott and Fremont produced acceptable yield as well as high desirable fruit quality.
Hamdy, A.E. (2018). Effect of pruning severity on yield and fruit quality of two mandarin cultivars. Acta Hortic. 1216, 135-144
citrus, 'Murcott', 'Fremont', light, moderate, heavy, fruit size