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Bayer 21/199 Lauded by USDA for Livestock Pest Control
The US Department of Agriculture recommends Bayer 21/199, sold as CORAL, for controlling cattle grubs horn flies lice ticks keds and screwworms on beef cattle and laceworms on swine. The chemical O-(3 chloro-4-methylumbelliferone) o diethylphosphorothioate must not be used on sick animals or calves under three months, and a 60 day interval is required before slaughter. It should not be used on dairy cattle or dairy goats due to milk excretion after treatment and no milk tolerance established.
MENTIONED IN THIS ARTICLE
US Department of Agriculture
USDA
Bayer