Herbicide safener isoxadifen-ethyl associated with increased Goss's wilt severity in corn (Zea mays).

Autor: Haugrud NH; Department of Plant Sciences, North Dakota State University, Fargo, ND, USA., Friskop A; Department of Plant Pathology, North Dakota State University, Fargo, ND, USA., Ikley JT; Department of Plant Sciences, North Dakota State University, Fargo, ND, USA.
Jazyk: angličtina
Zdroj: Pest management science [Pest Manag Sci] 2024 Sep; Vol. 80 (9), pp. 4516-4522. Date of Electronic Publication: 2024 May 08.
DOI: 10.1002/ps.8157
Abstrakt: Background: Goss's bacterial wilt and leaf blight (Goss's wilt), caused by the bacterium Clavibacter nebraskensis, is a corn disease that has been a top ten yield-reducing disease in North America in the past 15 years. Isoxadifen-ethyl is an herbicide safener that effectively increases cytochrome P450 activity in corn which enhances a plant's metabolism of herbicide molecules. Recent research found a potential link between isoxadifen-ethyl and increased Goss's wilt severity.
Results: The application of isoxadifen-ethyl increased (P = 0.014-0.046) area under disease progress curve (AUDPC) by 19%, 7%, and 9% at three environments, independent of accompanying herbicide or herbicide application timing. However, no significant differences in incidence of systemic wilt or corn grain yield occurred among treatments at any environment.
Conclusion: These data provide evidence for an association between isoxadifen-ethyl safener and Goss's wilt in corn. The reason for this association is unknown, but the safener may affect plant or pathogen physiological mechanisms. While the increased disease severity did not result in decreased grain yield in these experiments, an increase in pathogen inoculum due to higher disease severity could influence Goss' wilt epidemics in future years. © 2024 Society of Chemical Industry.
(© 2024 Society of Chemical Industry.)
Databáze: MEDLINE
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