Fuente: WIPO "varroa" An acaricidal preparation for diagnosis and control of ectoparasites of bees is proposed including 0.006 to 0.167% by weight of an ester of N-methyl-carbamic acid, acetone being the balance, up to 100% by weight. PAL The acaricidal preparation may also include difluoro dichloromethane and have the following composition, in % by weight: TBL ______________________________________ ester of N-methyl-carbamic acid 0.006 to 0.05 acetone 19.994 to 29.95 difluoro dichloromethane 80 to 70. ______________________________________ PAL The method of using the proposed acaricidal preparation is as follows: bee colonies are sprayed with the preparation in the form of aerosol at an ambient air temperature of 15.degree. to 30.degree. C., at a rate of 15 to 25 seconds per 50 cubic decimeters, once or up to four times, the interval between each treatment in the latter case being 12 to 24 hours. PAL The proposed acaricidal preparation is a highly effective agent for diagnosis and control of ectoparasites of bees. It ensures complete control of parasitic mites of genera Varroa jacobsoni and Acarapis woodi on bees, queens and drones without affectng them. The preparation is convenient in use, storage and transportation.