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Recurrent Selection with Low Herbicide Rates and Salt Stress Decrease Sensitivity of Echinochloa colona to Imidazolinone

Author

Listed:
  • Lariza Benedetti

    (Department of Crop Protection, Federal University of Pelotas, Pelotas 96160-000, RS, Brazil)

  • Vívian Ebeling Viana

    (Department of Crop Protection, Federal University of Pelotas, Pelotas 96160-000, RS, Brazil)

  • Pâmela Carvalho-Moore

    (Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA)

  • Vinicios Rafael Gehrke

    (Department of Crop Protection, Federal University of Pelotas, Pelotas 96160-000, RS, Brazil)

  • Gustavo Maia Souza

    (Department of Botany, Federal University of Pelotas, Pelotas 96160-000, RS, Brazil)

  • Edinalvo Rabaioli Camargo

    (Department of Crop Protection, Federal University of Pelotas, Pelotas 96160-000, RS, Brazil)

  • Luis Antonio de Avila

    (Department of Crop Protection, Federal University of Pelotas, Pelotas 96160-000, RS, Brazil)

  • Nilda Roma-Burgos

    (Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA)

Abstract

Weeds represent an increasing challenge for crop systems since they have evolved adaptability to adverse environmental conditions, such as salinity stress. Herbicide effectiveness can be altered by the quality of water in which the weed is growing. This research aimed to study the combined effect of salt stress and recurrent selection with a sublethal dose of imidazolinone herbicides in the shifting of the sensitivity of Echinochloa colona (L.) Link (junglerice) to imidazolinone herbicides. This study was divided into two experiments; in experiment I, three recurrent selection cycles were conducted in Pelotas/RS/Brazil with imazapic + imazapyr at 0.125× the field rate; and in experiment II, three recurrent selection cycles were conducted in Fayetteville/AR/USA with imazethapyr, at 0.125× the recommended dose. Salt stress was implemented by irrigation with 120 mM sodium chloride (NaCl) solution. The effective dose for 50% control of the population (ED 50 ) values increased from the field population to the second generation (G2) after recurrent selection with a sublethal dose of imidazolinone combined with salt stress, supporting the hypothesis of reduced susceptibility by the combination of these abiotic factors. Recurrent exposure to a sublethal dose of imazapic + imazapyr or imazethapyr, combined with salt stress, reduced susceptibility of Echinochloa colona (L.) plants to imidazolinone herbicides.

Suggested Citation

  • Lariza Benedetti & Vívian Ebeling Viana & Pâmela Carvalho-Moore & Vinicios Rafael Gehrke & Gustavo Maia Souza & Edinalvo Rabaioli Camargo & Luis Antonio de Avila & Nilda Roma-Burgos, 2021. "Recurrent Selection with Low Herbicide Rates and Salt Stress Decrease Sensitivity of Echinochloa colona to Imidazolinone," Agriculture, MDPI, vol. 11(3), pages 1-12, February.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:3:p:187-:d:505303
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    References listed on IDEAS

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    1. Phogat, V. & Pitt, T. & Cox, J.W. & Šimůnek, J. & Skewes, M.A., 2018. "Soil water and salinity dynamics under sprinkler irrigated almond exposed to a varied salinity stress at different growth stages," Agricultural Water Management, Elsevier, vol. 201(C), pages 70-82.
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    Cited by:

    1. Luis Avila & Nilda Roma-Burgos, 2023. "Herbicide Physiology and Environmental Fate," Agriculture, MDPI, vol. 13(6), pages 1-2, May.

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