استفاده از اكسين هاي مصنوعي راهي براي كاهش تلفات مركبات

APPLICATION OF SYNTHETIC AUXINS, A WAY FOR REDUCING OF CITRUS LOSSES

Citrus production in Iran exceeds 3.5 million tons per year. Any reduction in fruit losses will be of great interest to citrus growers. An experiment was conducted using naphthalene acetic acid (NAA) at the concentrations of 0, 300, 400 and 500 mg 1-1 and 2,4-dichlorophenoxyacetic acid (2,4-D) at the concentrations of 0, 10, 30 and 60 mg 1-1 on Satsuma mandarin (Citrus unshiu) to evaluate their effects on peel firmness, fruit preharvest drop and relative frequency of different sizes of fruits. The results indicated that all concentrations of 2,4-D and 400 mg 1-1 NAA increased peel firmness. Preharvest drop was significantly reduced with 400 mg 1-1 NAA. In all treatments of NAA and 2,4-D, the number of very small or unmarketable fruits were significantly reduced.