Blumeria graminis 1,402 claims

species · family Erysiphaceae · fungus · NCBI Taxonomy ↗

Common name: grass mildew — Also written in claims: Erysiphe graminis · Erysiphe graminis hordei · E. graminis · Erysiphe graminis tritici · Erysiphe graminis DC · Erysiphe graminis f sp tritici — NCBI synonyms: Erysiphe graminis

91 spellings

Blumeria graminis · picture from its Wikimedia Commons categoryClemson University - USDA Cooperative Extension Slide Series · CC BY 3.0 us · Wikimedia Commons ↗

1,402 claims

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Observationobservedoriginal resultmeasured

Claim · model-written summary

The pathogen Blumeria graminis was identified by microscopy.

Taxon: alfalfaMedicago sativat0
Interactor: Blumeria graminisBlumeria graminise0pathogen
Outcome: pathogense0

Verbatim

e0
“Microscopic examination revealed that the pathogens are obligate pathogens Plasmopara trifliorum and Blumeria graminis”
✓ located verbatim in the source · abstract, characters 558–676

t0
“ALFALFA DISEASES”
✓ located verbatim in the source · title, characters 51–67

Title

DETECTION AND IDENTIFICATION OF THE MAIN AGENTS OF ALFALFA DISEASES GROWING IN THE SOUTH-EAST OF KAZAKHSTAN

O.N. SHEMSHURA; A.K. SADANOV; A.A. NYSANBAEVA; et al. МИКРОБИОЛОГИЯ ЖӘНЕ ВИРУСОЛОГИЯ 2025. doi:10.53729/mv-as.2025.01.15

Other claims from this paper (6)

Observation The pathogen Fusarium solani was identified in alfalfa disease.
Observation The pathogen F. oxysporum was identified in alfalfa disease.
Observation The pathogen Alternaria alternata was identified in alfalfa disease.
Observation The pathogen A. tenuissima was identified in alfalfa disease.
Observation Downy and powdery mildew damaged alfalfa leaves.
Observation The pathogen Plasmopara trifliorum was identified by microscopy.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Virulence frequency increased for most tested Pm genes versus an earlier survey.

Taxon: wheatTriticum aestivume1
Interactor: Blumeria graminisBlumeria graminise1pathogen
Gene: Pm genese0
Outcome: virulence frequenciese0
Direction: increasede0
Comparator: previous survey in 2018–2019e0

Verbatim

e0
“Compared to a previous survey in 2018–2019, the virulence frequencies to most Pm genes have increased over the years, including Pm1a, Pm1b, Pm1c, Pm2, Pm3a, Pm3f, Pm5a, Pm5d, Pm17, Pm30, Pm34, Pm35, Pm43, MlAG12 and NCAG13”
✓ located verbatim in the source · abstract, characters 555–777

e1
“Blumeria graminis on wheat”
✓ located verbatim in the source · abstract, characters 89–115

Title

Virulence and molecular characterization of Blumeria graminis isolates from wheat fields across Ontario

Miao Liu; Seara Lim; Parivash Shoukouhi; et al. Canadian Journal of Plant Pathology 2025. doi:10.1080/07060661.2025.2475813

Other claims from this paper (6)

Observation Pm12, Pm16, Pm21 and Pm37 resisted all isolates.
Observation Nine genes resisted over 80% of isolates.
Observation Eleven other genes were ineffective, with susceptibility to 37–97% of isolates.
Observation Sequencing four pathogen genes in 116 isolates yielded only four informative SNPs.
Observation Linkage disequilibrium suggested frequent pathogen recombination.
Observation Virulence networks showed no genetic subdivision, suggesting a panmictic population.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Pm12, Pm16, Pm21 and Pm37 resisted all isolates.

Taxon: wheatTriticum aestivume1
Interactor: Blumeria graminisBlumeria graminise1pathogen
Gene: Pm12, Pm16, Pm21 and Pm37e0
Outcome: effective against all isolatese0

Not reportedDirection

Verbatim

e0
“Pm12, Pm16, Pm21 and Pm37 each remained effective against all isolates”
✓ located verbatim in the source · abstract, characters 793–863

e1
“Blumeria graminis on wheat”
✓ located verbatim in the source · abstract, characters 89–115

Title

Virulence and molecular characterization of Blumeria graminis isolates from wheat fields across Ontario

Miao Liu; Seara Lim; Parivash Shoukouhi; et al. Canadian Journal of Plant Pathology 2025. doi:10.1080/07060661.2025.2475813

Other claims from this paper (6)

Observation Virulence frequency increased for most tested Pm genes versus an earlier survey.
Observation Nine genes resisted over 80% of isolates.
Observation Eleven other genes were ineffective, with susceptibility to 37–97% of isolates.
Observation Sequencing four pathogen genes in 116 isolates yielded only four informative SNPs.
Observation Linkage disequilibrium suggested frequent pathogen recombination.
Observation Virulence networks showed no genetic subdivision, suggesting a panmictic population.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Nine genes resisted over 80% of isolates.

Taxon: wheatTriticum aestivume1
Interactor: Blumeria graminisBlumeria graminise1pathogen
Outcome: resistance to more than 80% of the isolatese0
Value: more than 80%e0

Not reportedDirection

Verbatim

e0
“Nine genes (Pm1a, Pm1b, Pm1c, Pm3d, Pm4b, Pm25, Pm29, MlAG12 and NCAG13) were generally effective, with resistance to more than 80% of the isolates”
✓ located verbatim in the source · abstract, characters 865–1012

e1
“Blumeria graminis on wheat”
✓ located verbatim in the source · abstract, characters 89–115

Title

Virulence and molecular characterization of Blumeria graminis isolates from wheat fields across Ontario

Miao Liu; Seara Lim; Parivash Shoukouhi; et al. Canadian Journal of Plant Pathology 2025. doi:10.1080/07060661.2025.2475813

Other claims from this paper (6)

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Eleven other genes were ineffective, with susceptibility to 37–97% of isolates.

Taxon: wheatTriticum aestivume1
Interactor: Blumeria graminisBlumeria graminise1pathogen
Outcome: susceptible reactionse0
Value: 37–97%e0

Not reportedDirection

Verbatim

e0
“The remaining 11 genes were ineffective, having susceptible reactions to 37–97% of the isolates”
✓ located verbatim in the source · abstract, characters 1014–1109

e1
“Blumeria graminis on wheat”
✓ located verbatim in the source · abstract, characters 89–115

Title

Virulence and molecular characterization of Blumeria graminis isolates from wheat fields across Ontario

Miao Liu; Seara Lim; Parivash Shoukouhi; et al. Canadian Journal of Plant Pathology 2025. doi:10.1080/07060661.2025.2475813

Other claims from this paper (6)

Observation Virulence frequency increased for most tested Pm genes versus an earlier survey.
Observation Pm12, Pm16, Pm21 and Pm37 resisted all isolates.
Observation Nine genes resisted over 80% of isolates.
Observation Sequencing four pathogen genes in 116 isolates yielded only four informative SNPs.
Observation Linkage disequilibrium suggested frequent pathogen recombination.
Observation Virulence networks showed no genetic subdivision, suggesting a panmictic population.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Sequencing four pathogen genes in 116 isolates yielded only four informative SNPs.

Taxon: wheatTriticum aestivume1
Interactor: Blumeria graminisBlumeria graminise1pathogen
Outcome: four informative segregating single nucleotide polymorphisms (SNPs)e0

Not reportedDirection

Verbatim

e0
“DNA sequences of 116 isolates (2018–2022) for the fragments of alternative oxidase (AOX), protein kinase A (PKA), protein phosphatase type 2A (PPA) and β-tubulin (bTUB) genes resulted in only four informative segregating single nucleotide polymorphisms (SNPs)”
✓ located verbatim in the source · abstract, characters 1111–1370

e1
“Blumeria graminis on wheat”
✓ located verbatim in the source · abstract, characters 89–115

Title

Virulence and molecular characterization of Blumeria graminis isolates from wheat fields across Ontario

Miao Liu; Seara Lim; Parivash Shoukouhi; et al. Canadian Journal of Plant Pathology 2025. doi:10.1080/07060661.2025.2475813

Other claims from this paper (6)

Observation Virulence frequency increased for most tested Pm genes versus an earlier survey.
Observation Pm12, Pm16, Pm21 and Pm37 resisted all isolates.
Observation Nine genes resisted over 80% of isolates.
Observation Eleven other genes were ineffective, with susceptibility to 37–97% of isolates.
Observation Linkage disequilibrium suggested frequent pathogen recombination.
Observation Virulence networks showed no genetic subdivision, suggesting a panmictic population.

Observationauthor interpretationoriginal resultmeasured

Claim · model-written summary

Linkage disequilibrium suggested frequent pathogen recombination.

Taxon: wheatTriticum aestivume1
Interactor: Blumeria graminisBlumeria graminise1pathogen
Outcome: frequent genetic recombinatione0

Not reportedDirection

Verbatim

e0
“The linkage disequilibrium analyses of these four SNPs suggested frequent genetic recombination”
✓ located verbatim in the source · abstract, characters 1372–1467

e1
“Blumeria graminis on wheat”
✓ located verbatim in the source · abstract, characters 89–115

Title

Virulence and molecular characterization of Blumeria graminis isolates from wheat fields across Ontario

Miao Liu; Seara Lim; Parivash Shoukouhi; et al. Canadian Journal of Plant Pathology 2025. doi:10.1080/07060661.2025.2475813

Other claims from this paper (6)

Observation Virulence frequency increased for most tested Pm genes versus an earlier survey.
Observation Pm12, Pm16, Pm21 and Pm37 resisted all isolates.
Observation Nine genes resisted over 80% of isolates.
Observation Eleven other genes were ineffective, with susceptibility to 37–97% of isolates.
Observation Sequencing four pathogen genes in 116 isolates yielded only four informative SNPs.
Observation Virulence networks showed no genetic subdivision, suggesting a panmictic population.

Observationauthor interpretationoriginal resultmeasured

Claim · model-written summary

Virulence networks showed no genetic subdivision, suggesting a panmictic population.

Taxon: wheatTriticum aestivume1
Interactor: B. graminisBlumeria graminise0pathogen
Outcome: no genetic subdivisione0

Not reportedDirection

Verbatim

e0
“network analyses of virulence phenotype data showed no genetic subdivision, suggesting B. graminis in the sampled area is likely a panmictic population”
✓ located verbatim in the source · abstract, characters 1483–1634

e1
“Blumeria graminis on wheat”
✓ located verbatim in the source · abstract, characters 89–115

Title

Virulence and molecular characterization of Blumeria graminis isolates from wheat fields across Ontario

Miao Liu; Seara Lim; Parivash Shoukouhi; et al. Canadian Journal of Plant Pathology 2025. doi:10.1080/07060661.2025.2475813

Other claims from this paper (6)

Observation Virulence frequency increased for most tested Pm genes versus an earlier survey.
Observation Pm12, Pm16, Pm21 and Pm37 resisted all isolates.
Observation Nine genes resisted over 80% of isolates.
Observation Eleven other genes were ineffective, with susceptibility to 37–97% of isolates.
Observation Sequencing four pathogen genes in 116 isolates yielded only four informative SNPs.
Observation Linkage disequilibrium suggested frequent pathogen recombination.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Direct UV-C treatment reduced B. graminis spore germination in vitro.

Taxon: barleyHordeum vulgaret0
Treatment: direct treatment of sporese0
Interactor: B. graminisBlumeria graminise1pathogene0
Outcome: germinatione0
Direction: reducede0
Setting: in vitroe0

Not reportedComparator

Verbatim

e0
“the direct treatment of spores showed reduced germination in vitro”
✓ located verbatim in the source · abstract, characters 944–1010

t0
“barley”
✓ located verbatim in the source · title, characters 10–16

e1
“effects of UV-C treatment direct on B. graminis”
✓ located verbatim in the source · abstract, characters 603–650

Title

Advancing barley protection: a study of UV-C light sources against powdery mildew (Blumeria graminis f. sp. hordei)

Aileen Hahlbohm; Christine Struck; Friederike de Mol; et al. Journal of Plant Pathology 2025. doi:10.1007/s42161-025-01970-7

Other claims from this paper (6)

Intervention effect UV-C irradiation before inoculation produced no significant visible effects.
Intervention effect UV-C treatment after inoculation reduced pustule numbers by up to 98% at 0.45 kJ/m 2.
Intervention effect UV-C treatment after inoculation decreased pustule size.
Association Treatment efficacy increased with dosage.
Intervention effect LED UV-C treatment was more effective than Hg UV-C treatment.
Recommendation The authors propose UV-C as an alternative crop protection measure against B. graminis.

Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The authors propose UV-C as an alternative crop protection measure against B. graminis.

Taxon: barleyHordeum vulgaret0
Treatment: UV-C treatmente0
Interactor: B. graminisBlumeria graminise0pathogen
Outcome: alternative crop protection measure against B. graminise0

Verbatim

e0
“UV-C treatment could be an alternative crop protection measure against B. graminis”
✓ located verbatim in the source · abstract, characters 1463–1545

t0
“barley”
✓ located verbatim in the source · title, characters 10–16

Title

Advancing barley protection: a study of UV-C light sources against powdery mildew (Blumeria graminis f. sp. hordei)

Aileen Hahlbohm; Christine Struck; Friederike de Mol; et al. Journal of Plant Pathology 2025. doi:10.1007/s42161-025-01970-7

Other claims from this paper (6)

Intervention effect UV-C irradiation before inoculation produced no significant visible effects.
Intervention effect Direct UV-C treatment reduced B. graminis spore germination in vitro.
Intervention effect UV-C treatment after inoculation reduced pustule numbers by up to 98% at 0.45 kJ/m 2.
Intervention effect UV-C treatment after inoculation decreased pustule size.
Association Treatment efficacy increased with dosage.
Intervention effect LED UV-C treatment was more effective than Hg UV-C treatment.