برري بيولوژي كنه گال زگيلي برگ گردو ERIOPHYES TRISTRIATUS NALEPA ACARI : ERIOPHYIDAE در همدان

Biology of walnut leaf gall mite. Eriophyes tristriatus (Nalepa) (Atari: Eriophydae) in Hamadan

Study on biology of Iranian walnut leaf gall mite Eriophyes iristriatus (Nalepa) was carried out during years of 1997 - 2000. The gall mite of walnut occured at the lower leaves of trees crown. It was developed moderately into the median and upper parts of crowns. Maximum densities were appeared in the early September. The infestation of leaves was observed mostly on the young trees of on leaves of branches with less low diameters. The felted leaves were not considered as source of infestation in the late season of following year. Insects and wind were the major factors in distributing and transporting this mite. The average leaf infestation was counted to be about 18%. Keywords: Iranian walnut, Gall mite, leaf, Infestation, Hamadan.