Management of pistachio trees in autumn One of the main operations pistachio shell in the autumn management of pistachio orchards is fruit pruning. Some of the problems that require pruning are as follows: Problems caused by year-rounding, including: Lack of uniform product production in different years; Increasing the percentage of small and abnormal pistachios; Increasing the percentage of tooth decay and porosity; Weakness of trees, broken branches and trunks; Branch curvature, their contact with the ground and increased fungal contamination. Terminal dominance and its problems, including: longitudinal overgrowth of terminal bud; Decreased growth of lateral branches; Decreased fruit fruiting level; Gradual increase of the distance between the fruiting place and the center of the tree, which due to its heavy weight, bends the branch and creates a suitable ground for sunburn; Increased likelihood of shading on lower branches.
