16 Result(s)
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Article
Guignardia bidwellii, the causal agent of black rot on grapevine has a low risk for QoI resistance
Sequence analysis of the cytochrome b gene of Guignardia bidwellii showed that the occurrence of the most important resistance mechanism for QoI fungicides, the G143A mutation, is relatively unlikely. This is due...
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Report on the annual meeting of the working groups ‘Mycology’ and ‘Host-Parasite-Interactions’ of the German Scientific Society for Plant Protection and Plant Health r. S.
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Article
First detection of a SDH variant with reduced SDHI sensitivity in Phakopsora pachyrhizi
Strains of Phakopsora pachyrhizi with a lower SDHI sensitivity have been found for the first time in monitoring studies in the season 2015–2016. Such strains needed to be characterized with respect to the underly...
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Article
Mutations in target genes of succinate dehydrogenase inhibitors and demethylation inhibitors in Ramularia collo-cygni in Europe
Ramularia collo-cygni is a devastating plant pathogen of barley with an increasing importance in Europe and several other barley growing regions worldwide. R. collo-cygni is a pathogen with potential to adapt rap...
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Occurrence and frequency of spot form and net form of net blotch disease of barley in Algeria
In Algeria, barley (Hordeum vulgare L.) is the second most cultivated cereal after wheat; however, this crop is challenged by several foliar diseases. Net blotch is one of the most common diseases of barley in Al...
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Editorial
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Article
Mutations in Cyp51 of Venturia inaequalis and their effects on DMI sensitivity
DMIs (sterol demethylation inhibitors) provide an important mode of action for control of Venturia inaequalis. They target the enzyme 14a-demethylase, encoded by the Cyp51 gene, which acts on an essential precurs...
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Article
Acquired QoI resistance in Pyrenophora teres through an interspecific partial gene transfer by Pyrenophora tritici-repentis?
In European QoI monitoring studies from 2019 on Pyrenophora teres, the causal agent of net blotch in barley, an isolate (ISO-2210) was identified with a level of QoI resistance that had never been observed before...
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Article
Generating single spore isolates of Phakopsora pachyrhizi for a better understanding of fungicide resistance mechanisms
The generation of single spore isolates is usually the first approach to characterize plant fungal pathogens with respect to their specific resistance mechanisms to fungicides. The isolation procedure can be t...
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Article
Obituary: Stefan Wagner (1962–2022)
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Article
PCR–RFLP analysis for detecting potential QoI and CAA fungicide resistance in onion and lettuce downy mildews
Downy mildew of onion and lettuce, caused by Peronospora destructor and Bremia lactucae, respectively, is distributed worldwide. Control of these serious diseases largely relies on oomycete fungicides including q...
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Article
New CYP51-genotypes in Phakopsora pachyrhizi have different effects on DMI sensitivity
The biotrophic basidiomycete Phakopsora pachyrhizi is the causal agent of Asian soybean rust (ASR), which has become a serious soybean disease in South America. Control of this disease is mainly based on fungicid...
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Article
Alterations in CYP51 of Cercospora beticola and their effects on DMI sensitivity
Cercospora leaf spot (CLS) disease caused by the ascomycete Cercospora beticola is the most widespread fungal leaf disease in sugar beet. Fungicides of two active ingredient classes, quinone-outside inhibitors (Q...
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Article
Occurrence and distribution of CYP51 haplotypes of Zymoseptoria tritici in recent years in Europe
Septoria tritici blotch (STB), caused by the pathogen Zymoseptoria tritici, is one of the most devastating diseases of wheat worldwide. Foliar disease management relies mainly on the application of fungicides. Th...
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Article
Just one at a time: fungal population experiments with Zymoseptoria tritici and metyltetraprole (Pavecto®) demonstrate the incompatibility of different cytochrome B mutations
The complex III of the mitochondrial respiration chain is an effective fungicidal target in plant pathogenic fungi. Especially the QoIs (FRAC Group 11 and 11A) fungicides cover a broad pathogen spectrum, that ...
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Article
Current update on the fungicide sensitivity of Erysiphe necator (grape powdery mildew) in Europe
The aim of the study was to provide information on the fungicide sensitivity of grape powdery mildew (Erysiphe necator) to some of the modes of action used for grape powdery mildew control with a focus on Europe....
