Survival and reproduction of Onthophagus landolti (Coleoptera: Scarabaeidae) exposed to ivermectin residues in cattle dung

Two bioassays were conducted in parallel to assess the effects of cattle treated with either 1% ivermectin (IVM) or 3.15% IVM (dosed at 0.2 and 0.63 mg kg−1, respectively) on reproduction and survival of Onthophagus landolti Harold. Adult beetles were exposed 10 days to faeces of treated cattle star...

Full description

Saved in:
Bibliographic Details
Published in:Bulletin of entomological research 2017-02, Vol.107 (1), p.118-125
Main Authors: Pérez-Cogollo, L.C., Rodríguez-Vivas, R.I., Reyes-Novelo, E., Delfín-González, H., Muñoz-Rodríguez, D.
Format: Article
Language:English
Subjects:
Animal diseases
Animals
Antimicrobial agents
Bioassays
Cattle
Cattle manure
Coleoptera
Coleoptera - drug effects
Coleoptera - growth & development
Coleoptera - physiology
Dung
Feces
Feces - chemistry
Fecundity
Insecticides - pharmacology
Ivermectin - pharmacology
Larva - drug effects
Larva - growth & development
Larva - physiology
Longevity - drug effects
Onthophagus
Parasites
Reproduction - drug effects
Research Papers
Scarabaeidae
Survival
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Two bioassays were conducted in parallel to assess the effects of cattle treated with either 1% ivermectin (IVM) or 3.15% IVM (dosed at 0.2 and 0.63 mg kg−1, respectively) on reproduction and survival of Onthophagus landolti Harold. Adult beetles were exposed 10 days to faeces of treated cattle starting at: one day before treatment (controls), 3, 6, 14, 28 and 35 days post-treatment. Adult survival of O. landolti was not affected by either of the two treatments. Faecal residues of 1% IVM almost completely suppressed fecundity of beetles at 3, 6 and 14 days post-treatment (dPT), and reduced fecundity of O. landolti at 28 dPT ( 38.3%), relative to controls. Meanwhile, IVM residues after treatment with 3.15% IVM almost completely suppressed fecundity of beetles at 3, 6, 14 and 28 dPT, and reduced fecundity of O. landolti at 35 dPT (80.9%), relative to controls. Larval survival was significantly reduced only at 3 dPT with 1% IVM. Meanwhile, treatment with 3.15% IVM significantly reduced larval survival at 6, 14 and 28 dPT. Larval mortality was recorded only in L-I and L-II instars. Moreover, in both bioassays, most of the L-I and L-II specimens that survived showed signs of toxicity. In conclusion, residual IVM in cattle faeces after treatment with injectable IVM has a detrimental effect on the fecundity of adult O. landolti up to 4 weeks post-treatment and on the subsequent larval survival.
ISSN:0007-4853
1475-2670
DOI:10.1017/S0007485316000705