Evaluation the effects of some chemical agents on thinning percent and quality of apricot cv ‘Khiary ’ (Prunus armenica L. cv. ‘Khiary ’)

Document Type : Research Article


Department of Horticultural Science-, College of Agriculture,- Jahrom University, PO BOX: 74135-111, Jahrom, Iran


To evaluate the effects of some chemical agents on fruit thinning percent and fruit quality of apricot cv ‘Khiary’ an experiment were carried out in the commercial orchard at Neyriz, Fars province, Iran. Naphthaleneacetic acid (NAA)( 10, 20 and 40 mg l-1 ), naphthaleneacetamide (NAD) ( 20, 40 and 80 mg l-1 ), ethephon ( 50, 100 and 200 mg l-1 ) and urea( 0.2, 0.4 and 0.6%) were sprayed on selected branch units 2 weeks after full bloom (AFB) in 2006. Results showed that all treatments except urea at 0.6% significantly increased fruit drop in comparison with control (P=0.05). Chemical agents increased fruit volume, length, diameter, total soluble solids (TSS), Tss/total acid ratio, nut weight and flesh/nut ratio. Between control and other treatments had no significant effect on total acidity (TA) of fruits.

Key words: Ethephon, Naphthaleneacetic acid (NAA), Naphthaleneacetamide (NAD), Urea