First report of QoI resistance in Cercospora beticola in sugar beet in Japan

QoI fungicides have been an important tool for controlling Cercospora leaf spot (CLS) of sugar beet in Japan. In 2013, CLS control failed at an experimental plot in Okhotsk subprefecture of Hokkaido after the application of trifloxystrobin. Among isolates of Cercospora beticola , the causal agent of...

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Bibliographic Details
Published in:Journal of general plant pathology : JGPP 2020-03, Vol.86 (2), p.149-153
Main Authors: Kayamori, Miyuki, Shimizu, Motoshige, Yamana, Toshikazu, Komatsu, Tsutomu, S-Iketani, Minako, Shinmura, Akinori, Sasaki, Jun, Kozawa, Tohru, Notsu, Ayumi, Yasuoka, Shinji
Format: Article
Language:English
Subjects:
Agriculture
Bioassays
Biomedical and Life Sciences
Cercospora beticola
Cytochrome
Cytochrome b
Cytochromes
Disease Control
Fungicides
Leafspot
Life Sciences
Microbiology
Mutation
Plant Pathology
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Summary:QoI fungicides have been an important tool for controlling Cercospora leaf spot (CLS) of sugar beet in Japan. In 2013, CLS control failed at an experimental plot in Okhotsk subprefecture of Hokkaido after the application of trifloxystrobin. Among isolates of Cercospora beticola , the causal agent of CLS, collected from this field were the first QoI-resistant strains found in Japan based on bioassays, culture assays and detection of G143A mutation in the cytochrome b gene. Additionally, our surveys of commercial fields in 2014–2015 revealed the widespread QoI resistance of C. beticola in Hokkaido.
ISSN:1345-2630
1610-739X
DOI:10.1007/s10327-019-00895-1