Eprinomectin residues have also been shown to have adverse effects on the survival species of dung-feeding Diptera for periods of 1-4 weeks after treatment (Floate et al., 2001; Wardhaugh et al, 2001b). Wardhaugh et al. (2001c) showed that faeces of cattle treated with a pour-on formulation of eprinomectin were toxic to larvae of the dung beetle, Onthophagous taurus, for 7-14 days after treatment. Adult beetles were also found to be sensitive to eprinomectin residues, which resulted in increased mortality among newly-emerged insects and reduced fecundity in those that survived.

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