Improvement of sheep skin quality after treatment with diazinon against cockle

Abstract

Cockle, otherwise known as ekek locally, has been economically the most important skin defect among the tanneries in Ethiopia for the last three decades. The disease has been experimented on since 1996 when FAO sponsored the trials on sheep and goat skin improvement trial (TCP/ETH/4558&6712) and found that diazinon improved the skin quality of treated sheep at least by 1 grade. However, the trials had not been sustainable to find out what the skin quality of the lambs of the dams that had been treated with diazinon would look like. The trial carried out at Debre Birhan Agriculture Research Centre filled this gap and showed repeatedly that sheep treated against lice and keds with diazinon improved the skin quality of the adult by 1 grade and those of their lambs by 3-5 grades. It started with 367 Menz and 265 Horro sheep in October 2009 and completed in January 2011. Lice and keds count of the trial sheep was carried out before and after treatment with diazinon. After the treatment, the parasite count dropped to 0 and there was a significant difference between the skin grades of the sheep before and after treatment with diazinon at 95% confidence level. The dramatic skin quality improvement appeared in the lambs which, compared to the adult sheep skins, had improved by 89% to 90%.