Comparison of Three Bioassay Methods to Estimate Levels of Tarnished Plant Bug (Hemiptera: Miridae) Susceptibility to Acephate, Imidacloprid, Permethrin, Sulfoxaflor, and Thiamethoxam

Journal of Economic Entomology
Maribel R PortillaK C Allen

Abstract

A laboratory colony of tarnished plant bugs reared solely on a meridic diet was exposed to acephate, imidacloprid, permethrin, sulfoxaflor, and thiamethoxam in dose-response experiments using floral-foam, glass-vial, and dipped-leaf assays. Results indicated that different assay methods produced different relative results across the different insecticides. Dose- and time-response regression models also indicated that length of exposure of tarnished plant bugs to insecticide-treated plant tissue is important. Time of exposure required to reach an LC90 at estimated recommended field rates suggested that the recommended lower field rate of acephate (0.56 kg ai/ha) would reach an LC90 of exposed tarnished plant bugs between 48 and 96 h post initial exposure. An LC90 of tarnished plant bugs exposed to permethrin (0.11 kg ai/ha) was not predicted from the regression modes over the 168-h observation; lower recommended application rates of imidacloprid (0.053 kg ai/ha), sulfoxaflor (0.053 kg ai/ha), and thiamethoxam (0.042 kg ai/ha) reached projected LC90s between 96 and 168 h of exposure. Collectively, the results of this study corroborate current existing procedures for tracking tarnished plant bug resistance to insecticides, but als...Continue Reading

References

Jun 15, 1977·Journal of Economic Entomology·G P Georghiou, C E Taylor
Oct 1, 1977·Journal of Economic Entomology·G P Georghiou, C E Taylor
Aug 26, 2014·Pesticide Biochemistry and Physiology·Thomas C SparksJames D Thomas
Dec 24, 2014·Biotechnology Advances·Mayank Anand GururaniPill-Soon Song
Nov 8, 2015·Journal of Economic Entomology·Katherine A ParysNathan S Little

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