abstract during 2007 and 2008, a survey on species diversity of acari associated with pistachio trees and seasonal dynamics of the dominant injurious species was conducted in mahvelat region for the first time. 8 varieties of pistachio including akbari, owhadi, badami, barg siah, ghermez, kalah ghochi, germeh and momtaz, commonly grown in the region were compared in terms of infestation to the ...