Abstract
The study was conducted during March April, 2007 with two groups each of four honeybee colonies at Honeybee Research Institute NARC Islamabad One group was treated with thymol and the other with formic acid The 4 gm thymol (powdered form) and the formic acid 65% (20ml) were applied 4 times at weekly interval It was found out that formic acid killed significantly higher number of mites as compared to thymol The total honey production harvested from colonies treated with different acaricides remained the same