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Ten-Year Comparison of Fungicide Sensitivity and Mycotoxin Production of Fusarium Head Blight Isolates from Korea

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Title: Ten-Year Comparison of Fungicide Sensitivity and Mycotoxin Production of Fusarium Head Blight Isolates from Korea
Authors: Parthiban Subramanian, Jung-Hye Choi, So-Soo Kim, Bo-Eun Kim, Ja-Yeong Jang, Ji-Seon Baek, Theresa Lee
Source: The Plant Pathology Journal, Vol 41, Iss 4, Pp 518-531 (2025)
Publisher Information: Hanrimwon Publishing Company, 2025.
Publication Year: 2025
Collection: LCC:Plant culture
Subject Terms: cereals, effective concentration 50%, scab, toxin, Plant culture, SB1-1110
Description: Fusarium head blight (FHB) is an important disease reducing yield and quality of wheat and barley. To study changes in fungicide efficacy over time, 161 FHB isolates (F. asiaticum and F. graminearum) were obtained from infected wheat and barley in the Jeolla provinces of the Republic of Korea from 2010–2013 and 2020–2023. Over 10 years, FHB fungi developed resistance to demethylation inhibitors (DMIs), methyl benzimidazole carbamates (MBCs), and phthalimides, with few exceptions. Also, no significant resistance against succinate dehydrogenase inhibitors (SDHI) and quinone-outside inhibitors (QoI) was observed, but sensitivity to phenylpyrrole (PP) increased. Mycotoxin production by four representative isolates of both species indicated that higher doses of DMI, DMI + DMI, MBC, MBC + DMI, and PP controlled trichothecenes, whereas zearalenone was controlled only by SDHI. QoI, QoI + DMI, and phthalimide did not control mycotoxin production in either species. Despite resistance development, DMI, MBC, and PP can still be used to control FHB and mycotoxins in wheat and barley in Korea with close monitoring of resistance.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 1598-2254
2093-9280
Relation: http://ppjonline.org/upload/pdf/PPJ-OA-05-2025-0068.pdf; https://doaj.org/toc/1598-2254; https://doaj.org/toc/2093-9280
DOI: 10.5423/PPJ.OA.05.2025.0068
Access URL: https://doaj.org/article/e5e1b2532f404267b120baf03fea8a23
Accession Number: edsdoj.5e1b2532f404267b120baf03fea8a23
Database: Directory of Open Access Journals
Description
Abstract:Fusarium head blight (FHB) is an important disease reducing yield and quality of wheat and barley. To study changes in fungicide efficacy over time, 161 FHB isolates (F. asiaticum and F. graminearum) were obtained from infected wheat and barley in the Jeolla provinces of the Republic of Korea from 2010–2013 and 2020–2023. Over 10 years, FHB fungi developed resistance to demethylation inhibitors (DMIs), methyl benzimidazole carbamates (MBCs), and phthalimides, with few exceptions. Also, no significant resistance against succinate dehydrogenase inhibitors (SDHI) and quinone-outside inhibitors (QoI) was observed, but sensitivity to phenylpyrrole (PP) increased. Mycotoxin production by four representative isolates of both species indicated that higher doses of DMI, DMI + DMI, MBC, MBC + DMI, and PP controlled trichothecenes, whereas zearalenone was controlled only by SDHI. QoI, QoI + DMI, and phthalimide did not control mycotoxin production in either species. Despite resistance development, DMI, MBC, and PP can still be used to control FHB and mycotoxins in wheat and barley in Korea with close monitoring of resistance.
ISSN:15982254
20939280
DOI:10.5423/PPJ.OA.05.2025.0068