Evaluation of fruits cultivar and different harvest times of several varieties of commercial pistachio nuts of Damghan locals to early split complications and contamination to the Aspergillus flavus fungus

Study the effect of fruit cultivar (intact, early split, irregular crack) on (akbari, abbasali, khanjari) cultivars in damghan city to aspergillus flavus fungus and effect of harvest time in early split pistachio in 1389, sampling from orchards has been performed. samples after grinding by dilute cultivating in a specific afpa medium bottles in a completely randomized model were three times recultivated. colonies of a. flavus after3 to 7 days, were isolated, identified and counted. the results of duncan grouping were analyzed by sas software. results of that study of contamination of samples to a. flavus fungal showed the contamination of the samples to the fungus a flavus differ from each other, there is less contamination in the khanjari cultivar and more contamination in akbari cultivar. with delay in the harvest time, percentage of intact fruits and without front skin cracking decrease. the lowest percentage of early split (0 first) was at first harvesting time (shahrivar 10) in akbari cultivar and the highest percentage of early split (shahrivar 20) in the the second harvest time in the akbari cultivar