Effects of Citrus viroid III (CVd-III) infection on tree growth and fruit qualitiy of 'Miyagawa-wase' Satsuma mandarin
2014
Kono, T. | Mizutani, F. | Sayama, H. | Takayanagi, N. | Sano, T.
Effects of inoculation of Citrus viroid III (CVd-III) on tree growth and quality of harvested fruit were investigated in 'Miyagawa-wase' satsuma mandarin (Citrus unshiu Marc.) grafted on trifoliate orange (Poncirus trifoliata). Inoculation reduced tree growth and the tree was dwarfed without any pathogenic symptoms. Fruit size was slightly smaller in inoculated trees. Yield per tree was lower in the inoculated trees but yield per hectare can be compensated by high density planting. The inoculation seemed to enhance rind coloration and to increase the ratio of flesh to rind representing edible portions. Both Brix and titratable acidity in the harvested fruit were higher in the inoculated trees. Therefore, inoculation of CVd-III is useful for tree dwarfing and enrichment of Brix and titratable acidity in 'Miyagawa-wase' satsuma mandarin grafted on trifoliate orange.
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