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The 14alpha-Demethylasse(CYP51A1) Gene is Overexpressed in Venturia inaequalis Strains Resistant to Myclobutanil.
The results suggest that overexpression of the target-site CYP51A1 gene is an important mechanism of resistance in some field resistant strains of V. inaequalis, but other mechanisms of resistance also appear to exist. Expand
Reduced Sensitivity in Monilinia fructicola to Propiconazole in Georgia and Implications for Disease Management.
The results suggest that a shift toward reduced sensitivity has developed in some M. fructicola populations from Georgia, and that isolates with reduced sensitivity to propiconazole are more difficult to control in the field. Expand
Resistance to Pyraclostrobin and Boscalid in Botrytis cinerea Isolates from Strawberry Fields in the Carolinas.
Resistance to QoI fungicides and dual resistance toQoI and SDHI fungicides is common in B. cinerea fields in the Carolinas, and resistant strains were more frequent in locations heavily sprayed with Qoi and SD HI fungicides. Expand
Characterization of Ribosomal DNA from Venturia inaequalis and Its Phylogenetic Relationship to rDNA from Other Tree-Fruit Venturia Species.
The described intron and ITS1 alleles in V. inaequalis provide genetic markers for subdividing populations of V. asperata and the ITS1-5.8S-ITS2 sequences are valuable in determining the relationship of the species from tree-fruit crops with other Venturia species. Expand
Paralogous cyp51 genes in Fusarium graminearum mediate differential sensitivity to sterol demethylation inhibitors.
Results indicate that different D MI fungicides target different CYP51 proteins in F. graminearum and that a mixture of DMI fungicides can result in synergistic effects, which have directly implications on chemical management strategies of plant diseases caused by Fusarium species. Expand
Resistance to Cyprodinil and Lack of Fludioxonil Resistance in Botrytis cinerea Isolates from Strawberry in North and South Carolina.
Cross resistance between the two AP fungicides cyprodinil and pyrimethanil was demonstrated, and isolates that were characterized in vitro as moderately resistant or resistant were equivalent in pathogenicity on fruit sprayed with pyrimETHanil, suggesting that the in vitro distinction of moderately resistant and resistant isolates is of little if any field relevance. Expand
The Cytochrome P450 Lanosterol 14α-Demethylase Gene Is a Demethylation Inhibitor Fungicide Resistance Determinant in Monilinia fructicola Field Isolates from Georgia
  • C. Luo, G. Schnabel
  • Biology, Medicine
  • Applied and Environmental Microbiology
  • 16 November 2007
The results strongly suggest that overexpression of the MfCYP51 gene is an important mechanism in conferring DMI fungicide resistance in M. fructicola field isolates from Georgia and that this overeexpression is correlated with Mona located upstream of theMfCyp51 gene. Expand
Occurrence and Detection of the DMI Resistance-Associated Genetic Element 'Mona' in Monilinia fructicola.
This study confirms that the Mona element is strongly linked to the DMI-resistance phenotype and reveals that overexpression of the MfCYP51 gene is a common DMI fungicide resistance mechanism in M. fructicola, not only in Georgia but throughout the eastern United States. Expand
Baseline Sensitivity of Monilinia fructicola from China to the DMI Fungicide SYP-Z048 and Analysis of DMI-Resistant Mutants.
The inability of M. fructicola to generate spontaneous DMI-resistant mutants coupled with reduced fitness of Y136F mutants can explain why this target site mutation has not yet emerged as a DMI fungicide resistance determinant in Monilinia spp. Expand
Characterization of iprodione resistance in Botrytis cinerea from strawberry and blackberry.
Sequence analysis of the target gene bos1 revealed that, in addition to point mutations in bos1, drug efflux pump activity and potentially a third mechanism of resistance may be contributing to the iprodione HR phenotype. Expand