Western corn rootworm pyrethroid resistance confirmed by aerial application simulations of commercial insecticides

Souza, Dariane; Vieira, Bruno C.; Fritz, Bradley K.; Hoffmann, W. C.; Peterson, Julie A.; Kruger, Greg R.; Meinke, Lance J.

doi:10.1038/s41598-019-43202-w

Cited by 24 publications

(61 citation statements)

References 64 publications

(68 reference statements)

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“…This study confirms that a relatively low level of WCR pyrethroid resistance detected in laboratory bioassays significantly reduces the performance of formulated soil‐applied pyrethroid products in the field. A study that analyzed over a decade of research at multiple US maize‐producing sites indicated that nearly 86% less root injury occurred in conventional maize when a soil insecticide was applied in addition to a standard low‐rate seed treatment .…”

Section: Discussionsupporting

confidence: 77%

“…At least 600 WCR adults were collected from each field population. The population from Saunders was pyrethroid‐susceptible, whereas populations from Keith1 and Keith2 were pyrethroid‐resistant . Adults collected in 2016 were taken to the Department of Entomology at the University of Nebraska‐Lincoln, Lincoln, NE, US and maintained there under standard rearing procedures .…”

Section: Methodsmentioning

confidence: 99%

“…For example, in the US western Corn Belt, maize production under irrigation has often been more profitable than other available crops, which discourages the adoption of crop rotation. The demand for maize is high for livestock operations and ethanol production, leading to higher adoption of continuous maize (maize planted consecutively for two or more years) . This can lead to build‐up of WCR densities, making the annual management of this pest a considerable challenge.…”

Section: Introductionmentioning

confidence: 99%

“…Laboratory bioassays then revealed WCR cross‐resistance to tefluthrin, a common soil insecticide active ingredient, and that resistance levels for both pyrethroids were higher for WCR adults than for larvae . The observed level of resistance was great enough to cause significant reductions in efficacy of formulated bifenthrin when resistant adult WCR were bioassayed at label rates under simulated aerial application conditions . The impact of larval pyrethroid resistance levels on the field performance of formulated pyrethroid soil insecticides has not been evaluated.…”

Section: Introductionmentioning

confidence: 99%

“…The impact of larval pyrethroid resistance levels on the field performance of formulated pyrethroid soil insecticides has not been evaluated. In order to complement a larger project to characterize WCR pyrethroid resistance and to inform WCR management strategies, the present study was designed to (i) evaluate the efficacy of some commonly used formulated soil insecticides against WCR in fields with different levels of WCR pyrethroid resistance and (ii) estimate in the laboratory current susceptibility levels of WCR larvae to the soil insecticide active ingredients.…”

Section: Introductionmentioning

confidence: 99%

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Field efficacy of soil insecticides on pyrethroid‐resistant western corn rootworms (Diabrotica virgifera virgifera LeConte)

Souza

Peterson

Wright

et al. 2019

Pest Management Science

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BACKGROUND: Field-evolved pyrethroid resistance has been confirmed in western corn rootworm (WCR) populations collected from the United States (US) western Corn Belt. Resistance levels of WCR adults estimated in lab bioassays were confirmed to significantly reduce the efficacy of foliar-applied bifenthrin. The objective of the present study was to investigate the impact of WCR pyrethroid resistance levels on the performance of common soil-applied insecticide formulations (23.4% tefluthrin, 17.15% bifenthrin, and 0.1% cyfluthrin + 2.0% tebupirimphos). Field trials were conducted in 2016 and 2017 in three Nebraska, US, counties (Saunders, Clay, and Keith) where distinct levels of WCR susceptibility to pyrethroids (susceptible, moderately resistant, and highly resistant) had been previously reported in adult and larval bioassays. RESULTS: All soil insecticide treatments effectively protected maize roots from a pyrethroid-susceptible WCR population atSaunders. In contrast, the efficacy of bifenthrin and tefluthrin soil insecticides was significantly reduced at Clay and Keith, where pyrethroid-resistant WCR populations were reported. At Keith, where an additional failure of the cyfluthrin + tebupirimphos soil insecticide was observed, WCR laboratory dose-response bioassays showed a consistent ∼5-fold resistance level to the active ingredients bifenthrin, tefluthrin, and cyfluthrin. CONCLUSION: The efficacy of common soil insecticides used in the US for WCR management was significantly reduced in populations exhibiting relatively low levels of WCR pyrethroid resistance. Using a multitactical approach to manage WCR within an integrated pest management framework may mitigate resistance evolution and prolong the usefulness of WCR insecticides within the system. RESULTS Field performance of formulated soil insecticidesA significant treatment by field interaction effect on root injury each year indicated that insecticide treatments performed differently depending on field location (2016: F 6,27 =4.60, P=0.0024; Pest Manag Sci 2020; 76: 827-833

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Section: Discussionsupporting

confidence: 77%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Field efficacy of soil insecticides on pyrethroid‐resistant western corn rootworms (Diabrotica virgifera virgifera LeConte)

Souza

Peterson

Wright

et al. 2019

Pest Management Science

Self Cite

View full text Add to dashboard Cite

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Customizing MRI‐Compatible Multifunctional Neural Interfaces through Fiber Drawing

Antonini

Sahasrabudhe

Tabet

et al. 2021

Adv Funct Materials

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Fiber drawing enables scalable fabrication of multifunctional flexible fibers that integrate electrical, optical, and microfluidic modalities to record and modulate neural activity. Constraints on thermomechanical properties of materials, however, have prevented integrated drawing of metal electrodes with low‐loss polymer waveguides for concurrent electrical recording and optical neuromodulation. Here, two fabrication approaches are introduced: 1) an iterative thermal drawing with a soft, low melting temperature (Tm) metal indium, and 2) a metal convergence drawing with traditionally non‐drawable high Tm metal tungsten. Both approaches deliver multifunctional flexible neural interfaces with low‐impedance metallic electrodes and low‐loss waveguides, capable of recording optically‐evoked and spontaneous neural activity in mice over several weeks. These fibers are coupled with a light‐weight mechanical microdrive (1 g) that enables depth‐specific interrogation of neural circuits in mice following chronic implantation. Finally, the compatibility of these fibers with magnetic resonance imaging is demonstrated and they are applied to visualize the delivery of chemical payloads through the integrated channels in real time. Together, these advances expand the domains of application of the fiber‐based neural probes in neuroscience and neuroengineering.

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Contrasting susceptibility of lepidopteran pests to diamide and pyrethroid insecticides in a region of overwintering and migratory intersection

Rabelo

Paula‐Moraes

Pereira

et al. 2020

Pest Management Science

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BACKGROUND: Pesticide resistance is a growing issue worldwide, and susceptibility of pest populations should be monitored in migratory intersection regions for successful resistance management. We determined the susceptibility of eight noctuid species from the Florida Panhandle to bifenthrin (pyrethroid) and chlorantraniliprole (diamide). Larvae from field and laboratory populations were exposed to commercial insecticide formulations using the leaf-dip method in concentration-mortality bioassays. RESULTS: The field populations of Helicoverpa zea (Boddie), Spodoptera frugiperda (Smith), S. eridania (Stoll), S. exigua (Hubner) and Chloridea virescens (Fabricius) had reduced susceptibility to bifenthrin compared with the laboratory populations. Resistance ratios to bifenthrin were as high as 10 071-fold in S. exigua and 436-fold in S. frugiperda, while there was no reduced susceptibility in Agrotis ipsilon (Hufnagel). The susceptibility to chlorantraniliprole was similar between the field and laboratory populations studied, except for S. exigua that exhibited 630-fold resistance to the diamide. The probit regression equations indicated that the larval mortality of S. exigua and S. frugiperda populations was <80% with bifenthrin at the concentration equivalent to the label rate. Likewise, the estimated mortality of S. exigua larvae with chlorantraniliprole at the label rate concentration was <80%. CONCLUSIONS: The lepidopteran pest populations tested were variable in susceptibility to bifenthrin by contrast to more consistent susceptibility to chlorantraniliprole. These results help in the choice of effective insecticides for integrated pest management and resistance management in cropping systems colonized by migratory lepidopteran pests from the U.S. Gulf Coast region.

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Western corn rootworm pyrethroid resistance confirmed by aerial application simulations of commercial insecticides

Cited by 24 publications

References 64 publications

Field efficacy of soil insecticides on pyrethroid‐resistant western corn rootworms (Diabrotica virgifera virgifera LeConte)

Field efficacy of soil insecticides on pyrethroid‐resistant western corn rootworms (Diabrotica virgifera virgifera LeConte)

Customizing MRI‐Compatible Multifunctional Neural Interfaces through Fiber Drawing

Contrasting susceptibility of lepidopteran pests to diamide and pyrethroid insecticides in a region of overwintering and migratory intersection

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