The effect of VolckReg. mineral oil application and its spray time on the yield and quality of commercial cultivars of pistachio in Qazvin area.

摘要

It has been shown that the application of VolckReg. mineral oil increases pistachio splitting and fresh and dry weight of the crop and decreases blankness and percentage of small fruit. A study was conducted to determine the best spraying time and concentration of VolckReg. mineral oil. The treatments comprised: two spraying times (14 February and 16 March), four concentrations of oil (0, 4, 6, and 8%) and two cultivars (Ghazvini and Ohadi). The fresh weight of total crop increased in both Ghazvini and Ohadi by 11.7 and 7.41 kg per tree, when applying 6% in 16 March. Other fruit characteristics (blankness, splitting), percent of small fruit and fruit total dry weight were significantly affected by the same treatment. Ghazvini was more affected than Ohadi..