Aim: Preliminary evaluation of flumvar efficacy in control of varroasis in some Tehranprovince's apiaries, Varroasis is the most important parasitic disease of honey bees that in addition of direct damages due to perforation of honey body can provide transmission the kinds of viruses and bacterias. However, during recent decade were carried out the efforts in order to biological control of varroasis but the main solution against varroa is chemical control by pesticides yet.
 
Methods: In this study 30 hives in 2 experimental group's induding negative control, andflumvar were surveyed. After determination of primary in festation in experimental group with flumvar was applicated according to theirs manafactere subsequently, 40 days after treatment the varroal in festation were determined again.
 
Results: flumvar was decreased varroal infestation from 12 to 2 and 11 to 1% respectively.The efficacy of flumvar was 90.26% respectively. No side effects were seen after flumval application. According to the more than 90 percent of flumvar efficacy the varroacidal effects of this pesticide is suitable.