Assessment of Sensitivities to Anilinopyrimidine- and Strobilurin-fungicides in Populations of the Apple Scab Fungus Venturia inaequalis
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Zusammenfassung
The sensitivity of Venturia inaequalis populations to the anilinopyrimidine fungicides pyrimethanil and cyprodinil was analysed by microscopic in vivo analysis of conidiophore formation. The sensitivity to the strobilurin kresoxim-methyl was analysed using an in vitro germination assay and by determination of the diseased leaf area and conidia produced in vivo. Baseline sensitivities were determined with V. inaequalis populations from control orchards that had never been treated with fungicides. Comparison of the baseline sensitivities with sensitivities ofpopulations obtained from orchards that had received 43 anilinopyrimidine treatments over 4 years, or from an orchard with 54 kresoxim-methyl treatments over 6 years indicated that no resistance to these fungicides has developed at the sites sampled.
Zusammenfassung in einer weiteren Sprache
Die Sensitivität von Venturia-inaequalis-Populationen gegenüber den Anilinopyrimidinfungiziden Pyrimethanil und Cyprodinil wurde durch eine mikroskopische in-vivo Analyse der Konidiophorenbildung analysiert. Die Sensitivität gegenüber dem Strobilurin Kresoxim-methyl wurde mittels eines in-vitro-Keimtests sowie durch eine Bestimmung der erkrankten Blattfläche und der Konidienbildung in vivo erfaßt. Die Basissensitivitäten wurden mit Hilfe von V-inaequalis-Populationen aus Kontroll-Apfelanlagen ermittelt, die noch nie mit Fungiziden behandelt worden waren. Ein Vergleich der Basissensitivitäten mit den Sensitivitäten von Populationen aus Apfelanlagen, die in 4 Jahren insgesamt 43 Anilinopyrimidinbehandlungen erhalten hatten, sowie aus einer Apfelanlage, die in 6 Jahren insgesamt 54 Kresoximmethylbehandlungen erhalten hatte, ergab, daB sich an den untersuchten Standorten keine Resistenz gegen diese Fungizide ausgebildet hatte.
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KUNZ, Stefan, B LUTZ, Holger DEISING, Kurt MENDGEN, 1998. Assessment of Sensitivities to Anilinopyrimidine- and Strobilurin-fungicides in Populations of the Apple Scab Fungus Venturia inaequalis. In: Journal of Phytopathology. 1998, 146(5/6), pp. 231-238. ISSN 0931-1785. eISSN 1439-0434BibTex
@article{Kunz1998Asses-7169,
year={1998},
title={Assessment of Sensitivities to Anilinopyrimidine- and Strobilurin-fungicides in Populations of the Apple Scab Fungus Venturia inaequalis},
number={5/6},
volume={146},
issn={0931-1785},
journal={Journal of Phytopathology},
pages={231--238},
author={Kunz, Stefan and Lutz, B and Deising, Holger and Mendgen, Kurt}
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