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Assessment of acute toxicity tests and rhizotron experiments to characterise lethal and sub-lethal control of soil-based pests

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Assessment of acute toxicity tests and rhizotron experiments to characterise lethal and sub-lethal control of soil-based pests. / Agatz, Annika; Schumann, Mario M.; French, B. Wade; Brown, Colin David; Vidal, Stefan.

In: Pest management science, Vol. 74, No. 11, 11.2018, p. 2450-2459.

Research output: Contribution to journalArticle

Harvard

Agatz, A, Schumann, MM, French, BW, Brown, CD & Vidal, S 2018, 'Assessment of acute toxicity tests and rhizotron experiments to characterise lethal and sub-lethal control of soil-based pests', Pest management science, vol. 74, no. 11, pp. 2450-2459. https://doi.org/10.1002/ps.4922

APA

Agatz, A., Schumann, M. M., French, B. W., Brown, C. D., & Vidal, S. (2018). Assessment of acute toxicity tests and rhizotron experiments to characterise lethal and sub-lethal control of soil-based pests. Pest management science, 74(11), 2450-2459. https://doi.org/10.1002/ps.4922

Vancouver

Agatz A, Schumann MM, French BW, Brown CD, Vidal S. Assessment of acute toxicity tests and rhizotron experiments to characterise lethal and sub-lethal control of soil-based pests. Pest management science. 2018 Nov;74(11):2450-2459. https://doi.org/10.1002/ps.4922

Author

Agatz, Annika ; Schumann, Mario M. ; French, B. Wade ; Brown, Colin David ; Vidal, Stefan. / Assessment of acute toxicity tests and rhizotron experiments to characterise lethal and sub-lethal control of soil-based pests. In: Pest management science. 2018 ; Vol. 74, No. 11. pp. 2450-2459.

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@article{7236e9e529fd4a18beeda9d710b705b1,
title = "Assessment of acute toxicity tests and rhizotron experiments to characterise lethal and sub-lethal control of soil-based pests",
abstract = "BACKGROUND: Characterising lethal and sub-lethal control of soil-based pests with plant protection products is particularly challenging due to the complex and dynamic interplay of the system components. Here we present two types of studies: acute toxcity experiments (homogenous exposure of individuals in soil) and rhizotron experiments (heterogeneous exposure of individuals in soil) to investigate their ability of strengthening the understanding of driving mechanisms of effectivness of the plant protection product. Experiments were conducted with larvae of the western corn rootworm Diabrotica virgifera virgifera LeConte and three pesticide active ingredients (clothianidin (neonicotinoid), chlorpyrifos (organophosphate), and tefluthrin (pyrethroid). RESULTS: The order of compound concentrations needed to invoke a specific effect intensity (EC50 values) within the acute toxicity tests was chlorpyrifos > tefluthrin > clothianidin. This order changed for the rhizotron experiments because application type, fate and transport of the compounds in the soil profile and sub-lethal effects on larvae also influence their effectiveness in controlling larval feeding on corn roots. CONCLUSION: Beyond the pure measurement of efficacy through observing relative changes in plant injury to control plants, the tests generate mechanistic understanding for drivers of efficacy apart from acute toxicity. The experiments have the potential to enhance efficacy testing and product development and might be useful tools for assessing resistance development in the future.",
keywords = "Diabrotica virgifera virgifera, Zea mays, tefluthrin, clothianidin, chlorpyrifos",
author = "Annika Agatz and Schumann, {Mario M.} and French, {B. Wade} and Brown, {Colin David} and Stefan Vidal",
note = "{\circledC} 2018 John Wiley & Sons, Inc. All rights reserved. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.",
year = "2018",
month = "11",
doi = "10.1002/ps.4922",
language = "English",
volume = "74",
pages = "2450--2459",
journal = "Pest management science",
issn = "1526-498X",
publisher = "John Wiley and Sons Ltd",
number = "11",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Assessment of acute toxicity tests and rhizotron experiments to characterise lethal and sub-lethal control of soil-based pests

AU - Agatz, Annika

AU - Schumann, Mario M.

AU - French, B. Wade

AU - Brown, Colin David

AU - Vidal, Stefan

N1 - © 2018 John Wiley & Sons, Inc. All rights reserved. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

PY - 2018/11

Y1 - 2018/11

N2 - BACKGROUND: Characterising lethal and sub-lethal control of soil-based pests with plant protection products is particularly challenging due to the complex and dynamic interplay of the system components. Here we present two types of studies: acute toxcity experiments (homogenous exposure of individuals in soil) and rhizotron experiments (heterogeneous exposure of individuals in soil) to investigate their ability of strengthening the understanding of driving mechanisms of effectivness of the plant protection product. Experiments were conducted with larvae of the western corn rootworm Diabrotica virgifera virgifera LeConte and three pesticide active ingredients (clothianidin (neonicotinoid), chlorpyrifos (organophosphate), and tefluthrin (pyrethroid). RESULTS: The order of compound concentrations needed to invoke a specific effect intensity (EC50 values) within the acute toxicity tests was chlorpyrifos > tefluthrin > clothianidin. This order changed for the rhizotron experiments because application type, fate and transport of the compounds in the soil profile and sub-lethal effects on larvae also influence their effectiveness in controlling larval feeding on corn roots. CONCLUSION: Beyond the pure measurement of efficacy through observing relative changes in plant injury to control plants, the tests generate mechanistic understanding for drivers of efficacy apart from acute toxicity. The experiments have the potential to enhance efficacy testing and product development and might be useful tools for assessing resistance development in the future.

AB - BACKGROUND: Characterising lethal and sub-lethal control of soil-based pests with plant protection products is particularly challenging due to the complex and dynamic interplay of the system components. Here we present two types of studies: acute toxcity experiments (homogenous exposure of individuals in soil) and rhizotron experiments (heterogeneous exposure of individuals in soil) to investigate their ability of strengthening the understanding of driving mechanisms of effectivness of the plant protection product. Experiments were conducted with larvae of the western corn rootworm Diabrotica virgifera virgifera LeConte and three pesticide active ingredients (clothianidin (neonicotinoid), chlorpyrifos (organophosphate), and tefluthrin (pyrethroid). RESULTS: The order of compound concentrations needed to invoke a specific effect intensity (EC50 values) within the acute toxicity tests was chlorpyrifos > tefluthrin > clothianidin. This order changed for the rhizotron experiments because application type, fate and transport of the compounds in the soil profile and sub-lethal effects on larvae also influence their effectiveness in controlling larval feeding on corn roots. CONCLUSION: Beyond the pure measurement of efficacy through observing relative changes in plant injury to control plants, the tests generate mechanistic understanding for drivers of efficacy apart from acute toxicity. The experiments have the potential to enhance efficacy testing and product development and might be useful tools for assessing resistance development in the future.

KW - Diabrotica virgifera virgifera

KW - Zea mays

KW - tefluthrin

KW - clothianidin

KW - chlorpyrifos

U2 - 10.1002/ps.4922

DO - 10.1002/ps.4922

M3 - Article

VL - 74

SP - 2450

EP - 2459

JO - Pest management science

T2 - Pest management science

JF - Pest management science

SN - 1526-498X

IS - 11

ER -