Effect of isofetamid on SDHI-resistant isolates of <i>Botrytis cinerea</i>.

ABSTRACT: Tests of sensitivity to isofetamid conducted with Botrytis cinerea isolated from Hokkaido (2011-2016) and other districts in Japan (2017-2018) revealed the absence of isolates with reduced sensitivity. Isolates of B. cinerea with mutation H272Y/R in sdhB, collected in Germany and Japan, resulted in high and moderate resistance to boscalid and many other succinate dehydrogenase inhibitors (SDHIs), respectively. However, these isolates were as sensitive as wild-type isolate to isofetamid. In contrast, isolate BC-50 [P225F] and BC-49 [H272L] caused moderate to high resistance to isofetamid. Considerable differences in mycelial growth, conidiation, conidial germination, and pathogenicity were not observed between these resistant isolates and sensitive isolates. A competitive assa

SUBMITTER: Abe Y 

PROVIDER: S-EPMC12665440 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature