Baseline toxicity and field efficacy of metaflumizone on colorado potato beetle (Coleoptera: Chrysomelidae)

Erin M. Hitchner, Thomas P. Kuhar, Galen P. Dively, Roger R. Youngman, Christopher R Philips, Troy D. Anderson

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Baseline toxicity levels to a novel semicarbazone insecticide, metaflumizone were established for 25 field populations of Colorado potato beetle, Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae), from North America. Excluding the susceptible laboratory strain, 50% lethal concentrations of metaflumizone ranged from 0.57 to 1.31 ppm, while response slopes ranged from 1.92 to 4.24 (average = 2.93), and were unrelated to the 50% lethal concentration (r = 0.06; P = 0.76). Beetle populations with known resistance to the neonicotinoid imidacloprid also exhibited the highest LC 50 levels to metaflumizone suggesting at least the possibility of cross-resistance. Additional experiments using a potato leaf-dip bioassay as well as field efficacy evaluations confirmed the high level of toxicity of metaflumizone to L. decemlineata and demonstrated a potential benefit of tank mixing a low rate of the pyrethroid esfenvalerate with metaflumizone at one-tenth the recommended field rate. These research findings confirm that metaflumizone is highly active against L. decemlineata larvae and adults and could provide an effective alternative insecticide for potato pest management.

Original languageEnglish (US)
Pages (from-to)207-213
Number of pages7
JournalJournal of economic entomology
Issue number1
StatePublished - Feb 2012


  • Leptinotarsa decemlineata
  • insecticide
  • potato
  • resistance management


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