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Abstract

Pesticidal compositions and articles providing topical application of a mixture of (1) a macrolide of the avermectin/milbemycin class, such as, but not limited to ivermectin, abamectin, or milbemectin, and (2) a synergist of the aryl aliphatic ether-class, such as, but not limited to piperonyl butoxide, present in (3) a weight ratio of synergist:macrolide that is great than 1:1. The compositions and articles demonstrate efficacy, even in point-of-contact applications, against various pests of domestic animals, such as, but not limited to arthropod ectoparasites including horn flies and buffalo flies. Methods are provided in which compositions can be employed as pour-ons, spot-ons, dusts, or sprays for direct topical application to the domestic animal; or in which articles comprising a polymer resin base, such as an ear tag, from which the active ingredients of the composition can be released, are affixed to the animal to provide long-term delivery.

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First Claim