THE STUDY IN EFFICIENCY OF α-СYPERMETHRIN WATER EMULSION AND AEROSOL DURING CATTLE DEMODECOSIS

Abstract

The tests of α-cypermethrin in the form of water emulsion and aerosol were carried out during cattle demodecosis. The efficiency of 5 g/l α-cypermethrin water emulsion was studied with the method of cattle local treatment in the concentrations 0.3, 0.5 and 0.75 % versus 5 g/l α-cypermethrin aerosol («Alpha-spray»). To test 25 animals were selected with the method of analogs and divided into 5 groups (4 experimental and 1 control). Demodecosis was diagnosed clinically in all the animals. The experimental animals were treated by local placing the preparations on the damaged parts of the body 3 times with 5-7 day intervals (groups 1-3 received 200-300 ml of α-cypermethrin water emulsion in 0.3, 0.5 and 0.75 % concentrations; group 4 was exposed to «Alpha-spray» aerosol for 20 seconds. The control animals were treated with water on which base working emulsions were made. «Alpha-spray», the α-cypermethrin aerosol, did not show high efficiency (intensity - 26.4 %), but 0.75 % α-cypermethrin water emulsion possessed pronounced acaricide activity during cattle demodecosis (intensity - 67.2 %; prevalence - 66.7)