Abstract

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 LC50 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.

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Authors

Hitchner EM, Kuhar TP, Dively GP, Youngman RR, Philips CR, Anderson TD

Institution

Department of Entomology, Virginia Tech, 216 Price Hall, Blacksburg, VA 24061-0319, USA.

Source

Journal of economic entomology 105:1 2012 Feb pg 207-13

MeSH

Animals
Beetles
Biological Assay
Canada
Dose-Response Relationship, Drug
Insect Control
Insecticide Resistance
Insecticides
Larva
Nitriles
Pyrethrins
Semicarbazones
United States

Pub Type(s)

Evaluation Studies
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22420273