Sour-cherry is economically considered the consequential fruit tree, providing a valuable and delicious fruit across the world. Recently,Bryobia rubrioculusScheuten (Acari: Tetranychidae) has been increased on orchards in Hamedan, Iran. In 2013, the biological studies on this mite was conducted on the two cultivars in the laboratory and constant condition (26 ± 0.5) ºC, (L: D) (16:8), and (60 ± 5) RH, at Bu Ali-Sina university. The findings depicted that in the two sour-cherry cultivars: BG5150 and BN5148 pre-imaginal development time was 22.39 and 24.55 days, gross fecundity rate 11.55 and 8.69 eggs, and r m assumed 0.019 and 0.017 day -1 respectively. Few biological parameters of the brown mite had a correlation with physiological aspects of the sour-cherry. The results would provide significant data of this mite on integrate pest management.
