The effects of parasiticides such as Folbex, Acaru, Kerthane, Donga and Sungrim on the control of an external mite Varroa jacobsoni in the honeybees were determined. The colonies used were consisted in 240 Italian and the first cross bees between Italian drones and Anatorian queens. The results obtained were as follows: 1. The control effect of the parasiticides was found to be about 90% with Donga, 70% with Kerthane, 60% with Folbex, 40 to 50% with Acaru, and only under 20% with Sungrim in the mild parasitized colonies. 2. Very few workers were killed from the application of the parasiticides against the mite. 3. The queens were attacked severely by the workers in most of the colonies treated with Kerthane, and sometimes those with Donga parasiticide, although they could be well protected with the queen cage from the worker attacking.