Journal of Plant Sciences 1816-4951 xxxx-xxxx Academic Journals Inc. 10.3923/jps.2007.228.232 Pistacia vera L.) Fruit Cropping]]> Abu-Zahra T. R. Al-Abbadi A. A. 2 2007 2 2 In this study artificial pollination has been studied in pistachio orchards. Six shoots that different pollinizers were applied in each tree; the experiment consisted of six treatments; natural pollination as control (covered with plastic mesh), honeybee plus natural pollination (kept uncovered) and four mixtures of pollen (2, 4, 6 and 8%) with soft wheat flour have been prepared for application. Results obtained showed that; artificial pollination of pistachio has both positive and some times negative effects on number of fruits per cluster. Two percent pollen mixture could be used as an effective treatment in pistachio orchards pollination. Artificial pollination not only increased number of fruits per cluster and total yield per cluster but also improved nut size and kernel dry weight in pistachio trees.

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