Co-Authors:
Stern, R.A., MIGAL, Galilee Technology Center, P.O. Box 831, Kiryat-Shmona 11016, Israel
Applebaum, S., Kibbutz Ortal, Golan Heights 12430, Israel
Flaishman, M., Institute of Horticulture, ARO, Volcani Center, Bet-Dagan 50250, Israel
Ben-Arie, R., Fruit Storage Research Laboratory, Kiryat Shmona 10200, Israel
Abstract:
The main cherry cultivar grown in the warm climate of Israel, 'Bing', produces relatively small fruit. Over three consecutive years (2003-2005), application of 50 mg L-1 2,4-dichlorophenoxypropionic acid (2,4-DP) as butoxyethyl ester (Power™), or 10 mg L-1 3,5,6-trichloro-2-pyridyloxyacetic acid (3,5,6-TPA) as free acid (Maxim ™), or 25 mg L-1 2,4-dichlorophenoxyacetic acid (2,4-D) + 30 mg L-1 naphthaleneacetic acid (NAA) (0.3% Amigo ™) at the beginning of pit-hardening, when fruitlet diameter was ca. 13 mm, caused an appreciable and significant increase in fruit size and total yield. Anatomical studies revealed that the main effect of these synthetic auxins was via direct stimulation of fruit cell enlargement. The above auxins had no negative effect on fruit quality, either at harvest or after one month at 0°C storage, or on the return yield of the trees in the following year.
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