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The efficacy of a 15% (w/w) mixture of octanoic, nonanoic and decanoic acids in light mineral oil to repel Culicoides biting midges (Diptera; Ceratopogonidae) was determined in three replicates of a 4×4 Latin square design under South African field conditions. The fatty acids were applied to ±0.07m 2 polyester meshes with a mesh size 2–3mm fitted to 220V 8W Onderstepoort downdraught light...
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