تعيين همبستگي بين دما، رطوبت نسبي و اثرات كنه كشي اسيد فرميك در كندوهاي زنبور عسل

To determine the correlation between temperature, relative humidity and miticidal activities of formic acid on honey bee hives

European honey bee (Apis mellifera L.) colonies infested with varroa mites (Varroa destructor A.&T.) were used to determine the correlation between temperature, relative humidity and their effects on miticide properties of formic acid 65% (1998-2000). Sixteen colonies were selected with sister queens. The colonies were divided to 4 treatments and 4 replications. The formic acid 65% applied in 80, 120, 160 and 200 ml/colony during 16 day. The percentage of dead mites was measured by sticky boardʹs method. During study, daily temperature and relative humidity were recorded. Results showed that mean mites mortality hadnʹt significant different in the first year (2.3-13°C, 42-100 Rh %) and the second year (5.7-18.1°C, 49-100 Rh%). But treatments had significant different in the third year (9.5-23.5°C, 38-100 Rh %). The correlation between mortality with temperature and relative humidity were found significant (r=0.181) and not significant (r=-0.05) respectively (P<0.05). In during the three years averages of mites mortality were increased any year and end of treatments.