Field effects of faecal residues from ivermectin slow-release boluses on the attractiveness of cattle dung to dung beetles

Medical and Veterinary Entomology
F Errouissi, J-P Lumaret

Abstract

A 2-year study was performed in two sites in southern France to assess the effect of ivermectin residues on the attractiveness of cattle dung to colonizing insects. Insect captures were compared between pitfall traps baited with dung from untreated cattle and dung from cattle that had been treated with a slow-release (SR) bolus of ivermectin. Cattle dung was collected at different times after treatment (4, 14, 42, 70 and 98 days). Excretion showed a plateau, with levels ranging between 0.688 µg and 1.123 µg ivermectin per gram of wet dung. Faecal residues affected insect captures at both sites. Effects were independent of the time dung was collected after treatment, except for one result subsequent to a severe drought during the baiting period. Ivermectin-contaminated dung showed a significant attractive effect, with increased captures regardless of the guild to which beetles belonged. This study demonstrates the attractiveness of ivermectin residues over a long period after the treatment of animals. It draws attention to the danger of widespread use of this endectocide-based SR bolus, which is attributable to the preferential attraction of insects to treated dung, which potentially puts at risk the survival of their offspring.

References

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Oct 22, 2002·Veterinary Research·Jean-Pierre Lumaret, Faiek Errouissi
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Citations

Jan 19, 2012·Environmental Entomology·Matteo NegroClaudia Palestrini
Aug 30, 2014·Medical and Veterinary Entomology·F Dantas-TorresD Otranto
May 29, 2015·The Onderstepoort Journal of Veterinary Research·Carmen T Jacobs, Clarke H Scholtz
Sep 16, 2008·Veterinary Parasitology·Chantal BoulardEtienne Petit
Mar 18, 2020·Environmental Toxicology and Chemistry·Domhnall FinchFiona Mathews
Jan 18, 2013·Integrated Environmental Assessment and Management·Nicole AdlerJörg Römbke
Jan 28, 2021·Parasitology Research·M JuncoC A Saumell

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