propetamphos and Lice-Infestations

Infestation of sheep with the biting louse Damalinia ovis is a potentially serious problem which can effect the quality and quantity of wool produced and may reduce weight gains. In this trial treated sheep produced 34 per cent more wool than louse-infested controls and the wool from the treated sheep was of a better quality. The mean liveweight gain in the treated groups was 18 per cent more than that in the untreated group. Treatment with a pour-on formulation of propetamphos at 25 to 50 mg kg-1 gave more than 99 per cent control of lice and protected against reinfestation for four months.

Topics: Administration, Topical; Animals; Body Weight; Insecticides; Lice Infestations; Organothiophosphorus Compounds; Phthiraptera; Sheep; Sheep Diseases; Wool

Propetamphos is a new organophosphorous compound with broad spectrum acaricidal and insecticidal activity. Dip wash concentrations of 100 to 200 ppm protect sheep against field challenge for approximately 10 weeks for blowflies, 16 weeks for lice and keds and six weeks for ticks. During laboratory and field trial studies a wash concentration of 125 ppm propetamphos eradicated sheep scab and protected from reinfestation for over four weeks.

Topics: Animals; Diptera; Ectoparasitic Infestations; Female; Insecticides; Lice Infestations; Mite Infestations; Organothiophosphorus Compounds; Sheep; Sheep Diseases; Tick Infestations