Tick Control by Helicopter Dusting of Diazinon and BHC on the Pasture

Abstract

First trials were conducted in the Sanjiro Paddocks of the Utsukushigahara Pasture in Nagano Prefecture during the summer of 1961, so that it might be determined whether free-living ticks on the pasture could be controlled effectively with pesticides applied by the helicopter.
Three formulae of 1.5% diazinon dust and one formula of 3% BHC dust were applied to 3 experimental plots of about 100 hectares each at a dose of 0.3 kg per hectare. Investigation was carried out on the following items: suitable flying conditions of the helicopter for dusting and dispersion, deposit and tickicidal effect of the dusts and their influence upon livestock.
The results showed a considerable drop in the tick population on the ground and no undesirable side effect of the dust upon cattle and sheep in the paddocks.