ISHS Acta Horticulturae 394: Plant Bioregulators in Horticulture
ETHYCHLOZATE ACCELERATES COLOURATION AND ENHANCES FRUIT QUALITY OF EARLY SATSUMA MANDARIN (CITRUS UNSHIU MARC.) GROWN IN PLASTIC GREENHOUSES |
| Authors: | S. Tominaga, I. Kozaki, S. Iwahori |
| Keywords: | Ethychlozate, Colouration, °Brix, Early satsuma mandarin, Leaf and leafless inflorescence, Plastic greenhouse |
| Abstract:
Satsuma mandarin grown in plastic greenhouses in Japan has a tendency towards delayed fruit degreening. The effect of ethychlozate on early satsuma mandarin grown under plastic greenhouse conditions was tested. Spraying 67 and 100 ppm ethychlozate at 30≈50 mm fruit diameter stage, enhanced colouration of early satsuma mandarin. Juice soluble solids (°Brix) was increased by ethychlozate spray, but the effect was not always significant. Other fruit characteristics were not affected by ethychlozate spray. Ethychlozate spray at the immature stage of fruit development did not affect the number and elongation of summer shoots which flushed after summer pruning, a common practice immediately after harvest of early satsuma mandarin grown in plastic greenhouses. Trees sprayed with ethychlozate the previous year tended to have more leafless inflorescences than non-sprayed trees. Ethychlozate spray did not affect leaf photosynthesis and transpiration rates. Ethychlozate showed more or less similar effects at concentrations between 67 and 100 ppm. | |
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