Claim · model-written summary
Two mefenoxam-resistant isolates of P. ultimum were identified (≥311 μg/ml).
- Taxon
- P. ultimumGlobisporangium ultimume0
- Interactor
- P. ultimumGlobisporangium ultimume0pathogen
- Outcome
- resistant isolatese0
- Value
- ≥311 μg/mle0
Not reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionQualifier
Verbatim
e0“two resistant isolates of P. ultimum were identified (≥311 μg/ml)”
Title
Jerry E. Weiland; Luisa Santamaria; Niklaus J. Grünwald Plant Disease 2014. doi:10.1094/pdis-09-13-0998-re
Other claims from this paper (7)
- Observation In vitro, P. irregulare isolates were approximately three times less sensitive to mefenoxam (0.20 μg/ml) than P. sylvaticum and P. ultimum (0.06 μg/ml each).
- Observation All three Pythium species were similarly sensitive to fosetyl-Al (1,256 to 1,508 μg/ml).
- Observation No fosetyl-Al-resistant isolates were found among the Pythium isolates.
- Intervention effect Fosetyl-Al consistently provided good protection against damping-off caused by Pythium species in Douglas-fir seedlings in the greenhouse.
- Intervention effect Phosphorous acid consistently provided good protection against damping-off caused by Pythium species in Douglas-fir seedlings in the greenhouse.
- Intervention effect Other treatments, including mefenoxam, gave good or intermediate protection against damping-off, with efficacy depending on the Pythium species.
- Recommendation Growers should consider rotating mefenoxam with other fungicide chemistries or biological treatments to prevent further development and spread of mefenoxam-resistant isolates.