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Rapid necrosis : implications of environmental conditions and plant growth stage on 2,4-D resistance and effect of other auxinic herbicides in Sumatran fleabane (Conyza sumatrensis)
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Sinigaglia Angonese, Paula, Silva de Queiroz, Andrew Rerison, Sinigaglia Angonese, Liana, Mesquita Machado, Filipi, Napier, Richard, Markus, Catarine, Delatorre, Carla and Merotto, Aldo (2023) Rapid necrosis : implications of environmental conditions and plant growth stage on 2,4-D resistance and effect of other auxinic herbicides in Sumatran fleabane (Conyza sumatrensis). Weed Technology, 37 (2). pp. 174-184. doi:10.1017/wet.2023.21 ISSN 0890-037X.
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WRAP-rapid-necrosis-III-environmental-growth-2-4-D-resistance-auxinic-herbicides-Sumatran-fleabane-Conyza-sumatrensis-Napier-2023.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (2896Kb) | Preview |
Official URL: https://doi.org/10.1017/wet.2023.21
Abstract
Resistant plants of Sumatran fleabane with an unusual rapid necrosis symptom after application of 2,4-D were characterized in previous studies. Field observations indicated variability in the occurrence of the rapid necrosis (RN) caused by 2,4-D, but the causes of the variation are unknown. This study aimed to investigate the effect of environmental conditions, plant growth stage, and simultaneous and sequential herbicide mixtures with other auxin mimics on the occurrence of RN caused by 2,4-D. Application at temperature of 12°C delayed the symptoms and decreased the intensity of the RN, but still resulted in plant survival to 2,4-D. The absence of light after herbicide application caused a slight delay in the symptoms, but the production of hydrogen peroxide and the size of necrosed area were not affected by the light treatments before and after 2,4-D application. Changes in plant photosynthesis through inhibiting photosystem II do not prevent the occurrence of the RN symptom. The auxinic herbicides dicamba, triclopyr, and halauxifen-methyl do not cause RN symptoms and are effective at controlling the resistant biotype when applied without 2,4-D, but the effectiveness of these herbicides was reduced when sprayed on the resistant biotype either together, 4 h or 24 h after 2,4-D. The RN phenotype does not occur for dicamba and triclopyr, even in advanced plant growth stages and high doses on the resistant biotype. The herbicides dicamba and triclopyr effectively controlled resistant plants, especially when sprayed at the initial growth stages. The results of this study identified environmental, plant development effects, and herbicide interactions, that interfere with the occurrence of RN symptoms caused by 2,4-D in Sumatran fleabane. These data provide insights about the mechanisms behind the RN symptoms caused by 2,4-D and are important for identifying the causes of variability of the herbicide symptomology and performance under experimental and field conditions.
Item Type: | Journal Article | |||||||||
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Subjects: | S Agriculture > SB Plant culture | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | |||||||||
Library of Congress Subject Headings (LCSH): | Herbicide resistance, Conyza sumatrensis, Photosynthesis, Growth (Plants), Weeds -- Control, Herbicides | |||||||||
Journal or Publication Title: | Weed Technology | |||||||||
Publisher: | Weed Science Society of America | |||||||||
ISSN: | 0890-037X | |||||||||
Official Date: | April 2023 | |||||||||
Dates: |
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Volume: | 37 | |||||||||
Number: | 2 | |||||||||
Page Range: | pp. 174-184 | |||||||||
DOI: | 10.1017/wet.2023.21 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Date of first compliant deposit: | 3 March 2023 | |||||||||
Date of first compliant Open Access: | 24 September 2023 | |||||||||
RIOXX Funder/Project Grant: |
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