A macrocyclic lactone, LL-F28249α, C36H52O8, was evaluated as a one- or two-injection treatment in different formulations and concentrations against cattle infested with Psoroptes ovis (Hering). One injection of 2 mg kg−1 or two injections of 1 mg kg−1 of 3% active material in either an aqueous or oil formulation failed to eliminate all of the mites. A single injection of 3 mg kg−1 as a 5% aqueous formulation (3%), the male mites appeared to be less susceptible to the acaricide than either the female or immature mites.

Fenvalerate [Cyano(3-phenoxyphenyl)methyl-4-chloro-alpha-(1-methylethyl) benzene acetate] was evaluated as a one- or two-dip treatment at two different concentrations against cattle infested with Psoroptes ovis (Hering). One or two dips at 0.025% or one dip at 0.05% failed to eliminate P. ovis; two dips in fenvalerate at 0.05% provided complete elimination of all mites. Fenvalerate was equally effective against male, female, and immature mites, but did not exhibit ovicidal properties.

Journal Article Note on Versatility of Silicone Dow Corning 11 Substrate for Gas Chromatography of Pesticides Get access Fred C Wright, Fred C Wright Toxicological Investigations Laboratory, Animal Disease and Parasite Research Division, U.S. Department of Agriculture, Kerrville, Tex. 78028 Search for other works by this author on: Oxford Academic Google Scholar Jayme C Riner Jayme C Riner Toxicological Investigations Laboratory, Animal Disease and Parasite Research Division, U.S. Department of Agriculture, Kerrville, Tex. 78028 Search for other works by this author on: Oxford Academic Google Scholar Journal of Association of Official Analytical Chemists, Volume 52, Issue 4, 1 July 1969, Page 879, https://doi.org/10.1093/jaoac/52.4.879 Published: 01 February 2020 Article history Received: 27 January 1969 Published: 01 February 2020

Psoroptes cuniculi, the ear mite of domestic rabbits, was collected from captive white-tailed deer (Odocoileus virginianus). This is the first report of rabbit ear mite infestations in white-tailed deer in Oklahoma or Texas (USA). In addition to moderate infestations in their ears, two 4-yr-old bucks, two 3-yr-old does, and seven 4-yr-old does showed patchy areas of alopecia along the sides and brisket. Both bucks also had patchy areas of alopecia around the base of antlers. Ear mites were eradicated from alt deer except from one doe by providing ivermectin- treated corn to the deer at a rate of 1,000 g (equivalent to 200 mcg/kg of ivermectin)/day/deer for several days. The ear mite infestation in the one doe was eradicated by intramuscularly injection with ivermectin at 400 mcg/kg. After treatment with the ivermectin and eradication of the mites, the atopecia improved and eventually was eliminated. The ivermectin-treated corn also controlled all internal nematode parasites in the deer.