Abstract
The insecticidal activity of parasiticide residues in dung of cattle treated with a sustained release eprinomectin formulation was examined, and an improved eprinomectin dung residue extraction method is presented. Emergent insect abundance and richness were significantly reduced in all post-treatment intervals (7, 14, 28, 56, 84, 112, and 140 d), relative to pre-treatment. Emergent insect diversity was reduced for between 84 and 112 d post-treatment. Collembola were not affected by residues. Chemical analyses subsequently documented residues of eprinomectin in dung of each collection period post-treatment at levels expected based on previously reported excretion profiles for this product. Cattle subcutaneously injected with this product excreted residues that reduced dung-breeding insect emergence for 5 mo post-treatment. The consequences of these long-term non-target effects to pasture ecosystems are not known.
Publication types
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Animals
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Antiparasitic Agents / administration & dosage*
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Antiparasitic Agents / toxicity*
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Cattle / parasitology
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Coleoptera / drug effects
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Coleoptera / physiology
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Delayed-Action Preparations
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Feces / chemistry
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Feces / parasitology
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Female
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Insecta / drug effects*
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Insecta / physiology
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Insecticides / administration & dosage
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Insecticides / toxicity
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Ivermectin / administration & dosage
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Ivermectin / analogs & derivatives*
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Ivermectin / toxicity
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Male
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Reproduction / drug effects
Substances
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Antiparasitic Agents
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Delayed-Action Preparations
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Insecticides
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Ivermectin
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eprinomectin
Associated data
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Dryad/10.5061/dryad.vg333dj
Grants and funding
This work was supported by the National Institute of Food and Agriculture, United States Department of Agriculture, Hatch project 232763 to DMS. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.