Control of poultry mites

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Abstract
A systemic insecticide carbaryl and a fumigant insecticide dichlorvos were investigated for the control of Dermanyssus gallinae and Liponyssus sylviarum. The blood of birds given single doses of 200–400 mg./kg. carbaryl was toxic to mites for up to 2 days, but it was found necessary to continue treatment for up to 17 days in order to control the mites. Dichlorvos emitted from a plastic “ Vapona “ strip and from an aqueous spray did not penetrate crevices and failed to control the mites. It was concluded that the systemic and fumigant insecticides investigated had no advantage over the normal contact insecticides for the control of poultry mites.