New Zealand Journal of Crop and Horticultural Science abstracts
Dormex and Promalin affects fruit set and earliness of apricot (Prunus
armeniaca) and plum (Prunus domestica) cultivars
Levent Son
Mut Technical High School
University of Mersin
Mut-Mersin
33600 Turkey
email: levent@mersin.edu.tr
Ayzin Baykam Kuden
Faculty of Agriculture
Department of Horticulture
University of Cukurova
Adana, Turkey
Abstract Dormex (49% hydrogen cyanamide) and Promalin
were applied to dormant trees of ‘Tokaloglu’ and ‘Karacabey’ apricot (Prunus
armeniaca) and ‘Papaz’ plum (Prunus domestica) to break dormancy
of flower and vegetative buds in 2001 and 2002. In both years, dormancy-breaking
chemicals caused better budbreak, earlier flowering and harvesting than control
trees. In apricots flowering was earlier by 2-5 days, in plums by 4-8 days.
In both plum and apricot cultivars, 1% and 2% concentrations of hydrogen
cyanamide gave better flower and vegetative budbreak ratio and fruit set.
The highest budbreak and fruit set ratios were 87.67% and 85.33% in ‘Papaz’
plum treated with 2% hydrogen cyanamide, respectively. Promalin applications
also caused better flower and vegetative budbreak and fruit set than control.
Chemically-treated trees could be harvested 2-9 days earlier than control
trees. All the chemical applications increased fruit weight in both plum
and apricot.
Keywords hydrogen cyanamide; budbreak; fruit set; apricot;
plum
H04008; Online publication date 8 March 2005 Received 26 January 2004;
accepted 30 September 2004
New Zealand Journal of Crop and Horticultural Science, 2005, Vol. 33:
59–64
0014-0671/01/3301-0059 © The Royal Society of New Zealand 2005
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