Comparative evaluation of Gabon PA92 and Bayvarolat control of varroasis in honey bee

Varoasis is one of the most important diseases of honey bee which caused by Varroa mites.This parasitic diseasecan destroy bee hives colonies at short time period.Varroa mite cause weakness in bee colonies because feedingvia bee larves and decrease bee hive production.So, chemical treatments were used in apiaries around the worldfor controlling of this disease.In this study,the effects of Gabon PA92 and Bayvarol was evaluated.30 bee hivesin Nazar abad of Karaj Province in 3 experimental groups were examined.In each bee hive,we took 50 adult beesand 50 honey bee pupa and their mites were separated so primary infestation was determined.After using Gabonand Bayvarol,rate of infestation was determined again.In control group because of unusing drug,rate of infestationwas higher but in groups of Bayvarol and Gabon,rate of infestation was decreased from 7.2% to 0.3 and 7 to 0.1 inadult bees and 5.7% to 0.2 and 5.4 % to 0.1 in pupa respectively.Effectivness of drugs was 95.8 % and 98.5 % inadult bees and 96.4 % and 98.1 % in pupa for Bayvarol and Gabon respectively.Although,the treatment effect ofGabon was a little more than Bayvarol but this difference was not signifcant (P>0.05).