Journal
JOURNAL OF PEST SCIENCE
Volume 86, Issue 1, Pages 115-123Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10340-011-0381-2
Keywords
Agriotes obscurus; Insect behavior; Insecticide; Morbidity; Pyrethroid; Pest control
Categories
Funding
- Pest Management Centre of Agriculture and Agri-Food Canada [MUR07-040]
- FMC Corporation
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We discuss the effect of the pyrethroid insecticide bifenthrin incorporated into soil at 100, 200, and 300 g AI/ha on late-instar larvae of the dusky wireworm, Agriotes obscurus (Coleoptera: Elateridae), and present a method of assessing wireworm health and mobility over time. Wireworms became moribund within 1 h of placement in soil amended with bifenthrin at all rates. After 2 weeks of morbidity in amended soils, wireworms recovered within 7 days of being placed in clean soil. A considerable proportion (0.13-0.93) of wireworms placed in amended soil moved to the soil surface and remained there for 2 weeks or more in a moribund state; wireworms transferred to clean soil no longer moved to the soil surface. Eight distinct mobility categories were observed and are described, and a new method for assessing wireworm health and mobility over time is discussed.
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