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Magne Nordang Skårn

Engineer

NIBIO Publications

Division of Biotechnology and Plant Health

Molecular Plant Biology

(+47) 922 29 465
magne.skarn@nibio.no

Place
Ås H7

Visiting address
Høgskoleveien 7, 1433 Ås

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Authors

Katherine Ann Gredvig Nielsen Magne Nordang Skårn Venche Talgø Martin Pettersson Inger Sundheim Fløistad Gunn Strømeng May Bente Brurberg Arne Stensvand

Abstract

No abstract has been registered

Authors

Eline Seim Varna Thangavel Arti Rai Magne Nordang Skårn May Bente Brurberg Tage Thorstensen

Abstract

No abstract has been registered

Authors

Katherine Ann Gredvig Nielsen Magne Nordang Skårn Venche Talgø Martin Pettersson Inger Sundheim Fløistad Gunn Strømeng May Bente Brurberg Arne Stensvand

Abstract

No abstract has been registered

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Authors

Katherine Ann Gredvig Nielsen Magne Nordang Skårn Gunn Strømeng May Bente Brurberg Arne Stensvand

Abstract

Control of grey mould, caused by Botrytis spp., is a major challenge in open field strawberry production. Botrytis was isolated from plant parts collected from 19 perennial strawberry fields with suspected fungicide resistance in the Agder region of Norway in 2016. Resistance to boscalid, pyraclostrobin and fenhexamid was high and found in 89.1%, 86.0% and 65.4% of conidia samples, respectively. Multiple fungicide resistance was common; 69.6% of conidia samples exhibited resistance to three or more fungicides. Botrytis group S and B. cinerea sensu stricto isolates were obtained from 19 and 16 fields, respectively. The sdhB, cytb, erg27 and mrr1 genes of a selection of isolates were examined for the presence of mutations known to confer fungicide resistance to boscalid, pyraclostrobin, fenhexamid and pyrimethanil plus fludioxonil, respectively. Allele-specific PCR assays were developed for efficient detection of resistance-conferring mutations in cytb. Among B. cinerea isolates, 84.7%, 86.3% and 61.3% had resistance-conferring mutations in sdhB, cytb and erg27, respectively. A triplet deletion in mrr1, resulting in ΔL497, commonly associated with the multidrug resistance phenotype MDR1h, was detected in 29.2% of Botrytis group S isolates. High frequencies of resistance to several fungicides were also detected in Botrytis from both imported and domestically produced strawberry transplants. Fungicide resistance frequencies were not different among fields grouped by level of grey mould problem assessed by growers, indicating factors other than fungicide resistance contributed to control failure, a fact that has important implications for future management of grey mould.

Authors

Katherine Ann Gredvig Nielsen Gunn Mari Strømeng Magne Nordang Skårn Kari Ørstad Arne Stensvand May Bente Brurberg

Abstract

No abstract has been registered

Authors

Gunn Strømeng Magne Nordang Skårn Kari Ørstad Arne Stensvand Katherine Ann Gredvig Nielsen May Bente Brurberg

Abstract

No abstract has been registered

Authors

Katherine Ann Gredvig Nielsen Gunn Strømeng Magne Nordang Skårn Kari Ørstad Arne Stensvand May Bente Brurberg

Abstract

No abstract has been registered

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