Occurrence of Hyd R3 fenhexamid resistance among Botrytis isolates in Northern German soft fruit production

Weber, Roland W.S.

doi:10.1007/bf03356357

Cited by 17 publications

(14 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Resistance to recently introduced fungicides, such as anilino-pyrimidines (APs), phenylpyrroles (PPs) and sterol biosynthesis inhibitors class III (SBIs-III; hydroxyanilides), has also been reported (Leroux et al 2002;Moyano et al, 2004;Weber, 2010). Moreover, field resistance to novel succinate dehydrogenase inhibitor (SDHI) fungicides was detected soon after their introduction (Bardas et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Frequency of fungicide-resistant Botrytis cinerea populations isolated from ‘Thompson Seedless’ table grapes in the Central Valley of Chile

Grez¹,

Copier²,

Román³

et al. 2017

Ciencia e investigación agraria

View full text Add to dashboard Cite

were sensitive to all fungicides tested; from north to south, the frequency of sensitive isolates in the regions of Valparaiso, Metropolitana and O'Higgins ranged from 48.15% to 21.1% and 5.88%, respectively. Four hundred and twenty isolates (79%) showed resistance to single or multiple fungicides, 134 (25.4%) were simultaneously resistant to azoxystrobin and pyrimethanil. No fludioxonil-resistant isolates were found, indicating that fludioxonil has great potential for gray mold control in table grapes in Chile. From sixty randomly selected B. cinerea isolates, only the azoxystrobin-resistant isolates carried the G143A point mutation; according to the cytochrome b (cyt b) gene structure, the third intron Bcbi-143/144 was only detected in the azoxystrobin-sensitive isolates. The H272R and H272Y point mutations in the succinate dehydrogenase subunit B (sdhB) gene were associated only with the boscalid-resistant isolates. The F412S and F412V point mutations were found in the sequenced erg27 gene of randomly selected fenhexamid-resistant isolates. These results contribute to the knowledge of B. cinerea fungicide resistance for table grape vine crops in Central Chile, particularly for the development of multiple-resistance and the associated resistance mechanisms of azoxystrobin, boscalid and fenhexamid-resistant isolate populations. Antiresistance strategies are discussed in a general manner.

show abstract

Section: Introductionmentioning

confidence: 99%

Frequency of fungicide-resistant Botrytis cinerea populations isolated from ‘Thompson Seedless’ table grapes in the Central Valley of Chile

Grez¹,

Copier²,

Román³

et al. 2017

Ciencia e investigación agraria

View full text Add to dashboard Cite

show abstract

“…For example, mutations in the ␤-tubulin gene at codon 198 or 200 are well-known to be responsible for high levels of benzimidazole resistance in a variety of fungi (5)(6)(7). Field strains with high levels of fenhexamid resistance (called HydR3) have been shown to carry mutations in the erg27 gene, encoding a 3-keto reductase involved in ergosterol biosynthesis (8,9). Studies with Alternaria alternata and B.…”

mentioning

confidence: 99%

Gray Mold Populations in German Strawberry Fields Are Resistant to Multiple Fungicides and Dominated by a Novel Clade Closely Related to Botrytis cinerea

Leroch

Plesken

Weber³

et al. 2013

Appl Environ Microbiol

187

248

View full text Add to dashboard Cite

The gray mold fungus Botrytis cinerea is a major threat to fruit and vegetable production. Strawberry fields usually receive several fungicide treatments against Botrytis per season. Gray mold isolates from several German strawberry-growing regions were analyzed to determine their sensitivity against botryticides. Fungicide resistance was commonly observed, with many isolates possessing resistance to multiple (up to six) fungicides. A stronger variant of the previously described multidrug resistance (MDR) phenotype MDR1, called MDR1h, was found to be widely distributed, conferring increased partial resistance to two important botryticides, cyprodinil and fludioxonil. A 3-bp deletion mutation in a transcription factor-encoding gene, mrr1, was found to be correlated with MDR1h. All MDR1h isolates and the majority of isolates with resistance to multiple fungicides were found to be genetically distinct. Multiple-gene sequencing confirmed that they belong to a novel clade, called Botrytis group S, which is closely related to B. cinerea and the host-specific species B. fabae. Isolates of Botrytis group S genotypes were found to be widespread in all German strawberry-growing regions but almost absent from vineyards. Our data indicate a clear subdivision of gray mold populations, which are differentially distributed according to their host preference and adaptation to chemical treatments.

show abstract

“…From this chapter as well as previous publications (Weber, 2010b(Weber, , 2011, it is apparent that B. cinerea populations associated with Northern German strawberry and raspberry fields harbour an exceptionally high proportion of MR-and/or HR-type resistance against all currently registered fungicide classes, and that resistance development may be on the increase. We are particularly concerned about the possible spread of strains with multiple fungicide resistance because such a development questions the sustainability of the current crop protection practices.…”

Section: Factors Favouring the Spread Of Fungicide Resistance In B Cmentioning

confidence: 65%

“…Whilst the share of fenhexamid-resistant isolates collapsed in field A, it remained at a high level in field B. On a regional scale, the percentage of fenhexamid resistance in Northern German soft-fruit production has risen from 18.5% in 2009 (Weber, 2010b) to 45.0% in 2010 (Weber, 2011).…”

Section: The Dimension Of Timementioning

confidence: 99%

“…We were concerned about the total reliance on single-site fungicides for grey mould control since 2007, and the lack of any information regarding the current resistance status of regional Botrytis populations. In order to address the latter problem, we carried out the surveys and experiments reported here and in previous publications (Weber, 2010b(Weber, , 2011Weber & Hahn, 2011).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multiple Fungicide Resistance in Botrytis: A Growing Problem in German Soft-Fruit Production

Weber¹,

Entrop²

2011

Fungicides - Beneficial and Harmful Aspects

View full text Add to dashboard Cite

Occurrence of Hyd R3 fenhexamid resistance among Botrytis isolates in Northern German soft fruit production

Cited by 17 publications

References 10 publications

Frequency of fungicide-resistant Botrytis cinerea populations isolated from ‘Thompson Seedless’ table grapes in the Central Valley of Chile

Frequency of fungicide-resistant Botrytis cinerea populations isolated from ‘Thompson Seedless’ table grapes in the Central Valley of Chile

Gray Mold Populations in German Strawberry Fields Are Resistant to Multiple Fungicides and Dominated by a Novel Clade Closely Related to Botrytis cinerea

Multiple Fungicide Resistance in Botrytis: A Growing Problem in German Soft-Fruit Production

Contact Info

Product

Resources

About