A5081393158- Plant Disease Resistance and Genetics
- Fungal Plant Pathogen Control
- Plant Pathogens and Resistance
- Nematode management and characterization studies
- Plant Disease Management Techniques
- Plant Pathogens and Fungal Diseases
- Plant and Fungal Interactions Research
- Plant Pathogenic Bacteria Studies
- Forest Insect Ecology and Management
- Powdery Mildew Fungal Diseases
- Plant and fungal interactions
- Viral Infections and Vectors
- Plant Virus Research Studies
- Insect-Plant Interactions and Control
- Legume Nitrogen Fixing Symbiosis
- Nitrogen and Sulfur Effects on Brassica
- Agronomic Practices and Intercropping Systems
- Wheat and Barley Genetics and Pathology
- Agriculture, Plant Science, Crop Management
Swedish University of Agricultural Sciences
2011-2021
Early blight, caused by the fungus Alternaria solani, is a common foliar disease in potato. Quinone outside inhibitor (QoIs) fungicides have commonly been used against A. solani. To avoid or delay development of fungicide resistance it recommended to alternate combine with different modes action. Therefore, we compared two programs early blight field trials and studied within season changes pathogen population. An untreated control was treatments using azoxystrobin alone program involving...
Early blight, caused by the fungus Alternaria solani, occurs on potato mainly in south-eastern part of Sweden, but also other parts country. The aim this study was to investigate genetic diversity A. solani populations from different growing regions Sweden using AFLP marker analysis. In addition, cultured isolates were examined for substitutions gene encoding cytochrome b, associated with loss sensitivity against QoI fungicides. Nei's index Swedish revealed a up 0.20. Also differentiation...
The incidence of the pathogenic fungus Alternaria solani on potato during years 2009 to 2016 was analysed and distribution two genotypes cytochrome b (genotype 1, GI genotype 2, GII) determined. Potato leaflets with lesions resembling early blight were collected in August September 2009–2016 south-eastern part Sweden 2010 2012–2014 central Sweden. In total, 2042 leaflet samples using diagnostic PCR methods. more commonly found later growing seasons. occurrence substitutions gene encoding b,...
The pathogenic fungus Rhizoctonia solani causes major economic losses for potato producers in Sweden. Producers, as well extension officers, have reported possible increases severity of R. when free-living plant-parasitic nematodes are present and active. aim this study was to investigate interactions spatial correlations between root-lesion (Pratylenchus spp.), stubby-root (Trichodoridae) the stem canker caused by under field conditions. Nematodes genus Globodera were also included after...
Fungicide resistance has become a challenging problem in management of Septoria tritici blotch (STB), caused by Zymoseptoria tritici, the most destructive disease winter wheat throughout western and northern Europe. To ensure continued effectiveness those fungicides currently used, it is essential to monitor development spread such field populations pathogen. Since key families used for STB control (demethyalation inhibitors or azoles, succinate dehydrogenase SDHIs Quinone outside Inhibitors...
Potato tuber necrosis in the form of spraing symptoms is caused by infection with mop‐top virus ( PMTV ) or Tobacco rattle TRV ); has become more important Swedish potato crop production. In this study, presence Sweden three potato‐infecting viruses associated necrotic tubers was demonstrated: , and TNV ). This study shows that both are frequent fields. found all counties, except two most northern ones. present at several locations southern up to central parts Sweden. Both were further north...
Use of resistant cultivars is considered the most effective tool in managing clubroot. Three clubroot-resistant commercial winter oilseed rape (OSR) and a susceptible ‘Cultivar mix’ were evaluated for disease severity index (DSI) yield performance field soils, selected varying abundance natural inoculum Plasmodiophora brassicae. Seven trials carried out during 2017–2019 OSR crops, comparative bioassays performed growth chamber. Substantial variation clubroot infection between years was...
Abstract Early blight, caused by Alternaria solani , is a common potato disease worldwide. Reduced field efficacy of the fungicide boscalid against this has been reported in several countries. Boscalid resistance mostly studied with in-vitro and/or greenhouse experiments. Field studies validating phenomenon are largely missing. Here, for first time Scandinavia, we validated Swedish population A. both and laboratory. trials between 2014 2017 Nymö showed significant reduction year. The target...
Abstract The significance of nematodes for disease development caused by other soil-borne pathogens has been demonstrated in many crops throughout the world and specifically prevalent are interactions between plant-parasitic species plant pathogenic fungi. Here, interaction fungus Rhizoctonia solani (AG2) migratory endoparasitic root-lesion nematode Pratylenchus penetrans was investigated on potato. hypotheses were that combination R. P. would result more severe canker lesions, reduced...
Soil microorganisms and soil fauna may have a large impact on the tuber yield of potato crops. The interaction between root-lesion nematodes pathogenic fungus Rhizoctonia solani Kühn was studied plants grown in pots under controlled conditions. In two similar experiments, different combinations fungal mycelium were added to at three occasions; planting, after 14 days, 28 days. reduced root biomass combination R. resulted both but not synergistic. contrast, number stem canker lesions...
Crop damage is associated with infection by plant pathogens but can also arise through abiotic factors. However, the are involved in biotic interactions other pathogens, and these may differ depending of cultivar crop. Here, interaction between fungus Rhizoctonia solani (AG3) free-living plant-parasitic nematodes was investigated a pot experiment different potato cultivars. No synergistic R. found, instead there an effect treatment lower tuber yield when occurred alone. There were...
Stem canker on germinating potato sprouts is often caused by seed-borne inoculum of the fungus Rhizoctonia solani. However, high amounts free-living plant-parasitic nematodes have been found in field patches plants with stem canker. Fungicide treatment seed tubers can be used to avoid but it unknown if affect this. To investigate whether nematodes, root-lesion nematode Pratylenchus penetrans or a combination several genera full community, may negative effect fungicide treatment, pot...
Optimal seed yield and quality requires that the sulphur (S) demand of faba bean (Vicia L.) is ensured. The effect S fertilization on organic cultivated was investigated under field conditions during two growing seasons (2017–2018), in Sweden. Kieserite (MgSO4) gypsum (CaSO4) were applied at a rate 20 40 kg ha-1 to study growth, yield, crude protein (CP) content amino acid (AA) composition. Gypsum kieserite significantly increased concentration dry matter (DM) 2017. ranged from 0.20% 0.23%...
Oilseed radish (OR;