A5017314053- Plant Pathogens and Resistance
- Plant Disease Resistance and Genetics
- Fungal Plant Pathogen Control
- Potato Plant Research
- Plant Pathogens and Fungal Diseases
- Mycotoxins in Agriculture and Food
- Agriculture, Plant Science, Crop Management
- Irrigation Practices and Water Management
- Genetically Modified Organisms Research
- Nematode management and characterization studies
- Viral Infections and Vectors
- Plant Pathogenic Bacteria Studies
- Spectroscopy and Chemometric Analyses
- Agricultural Development and Management
- Powdery Mildew Fungal Diseases
- Agricultural Research and Practices
- Garlic and Onion Studies
- Plant-Microbe Interactions and Immunity
Aarhus University
2017-2025
Agroécologie
2018-2022
Abstract Mandipropamid is an active ingredient in the carboxylic acid amide group of fungicides and plays a key role current potato late blight ( Phytophthora infestans ) management programmes. However, reports from Danish growers 2022 suggested that mandipropamid had lost its efficacy. A study was therefore conducted to investigate sensitivity isolates collected fields which been reported be ineffective. Seventy‐two P . Denmark were genotyped using microsatellite markers, revealing...
Field experiments were conducted in 2015 and 2016 to classify the resistance level early blight of main potato cultivars Denmark. A total 38 used. The experiment was designed as a randomized complete block design ( RCBD ) with four replicates. potatoes inoculated by spreading barley Hordeum vulgare kernels infested Alternaria solani A. alternata . Disease assessment done at weekly intervals starting from onset first symptoms. disease progress curves DPC on compared that Bintje. multivariate...
In recent years, early blight epidemics have been frequently causing important yield loses in potato crop. This fungal disease develops quickly when weather conditions are favorable, forcing the use of fungicides by farmers. A Limia is one largest areas for production Spain. Usually, controlled using pre-established schedule calendars. strategy expensive and can affect environment agricultural areas. Decision support systems not currently place to be used farmers managing blight. Thus,...
<title>Abstract</title> Late blight<italic> (Phytophthora infestans</italic>) and<italic> </italic>early (Alternaria solani) </italic>are the most important diseases in potato cultivation. The control of these depends largely on fungicide sprays during growing season. Fungicides differ their efficacy to any pathogen. use effective fungicides is necessary for both disease and avoid unnecessary sprays. Each active ingredient has its own efficacies specific characteristics, which are expressed...
<title>Abstract</title> Fungicides are integral in managing late blight caused by <italic>Phytophthora infestans</italic>. However, understanding the optimal timing for fungicide application is crucial achieving best results. This study investigates influence of and active ingredients on efficacy control a susceptible potato cultivar (cv. Bintje) during two experimental seasons (2009 2010). The tested fungicides included protectant (cyazofamid mancozeb) curative (propamocarb + cymoxanil)...
Until recently, genotypes of Phytophthora infestans were regionally distributed in Europe, with populations western Europe being dominated by clonal lineages and those northern genetically diverse because frequent sexual reproduction. However, since 2013 a new lineage (EU_41_A2) has successfully established itself expanded the sexually recombining P. Europe. The objective this study was to phenotypic traits infestans, which may explain its successful establishment expansion within...
Abstract Since the mid‐2010s, Phytophthora infestans clones that have been dominant in Western Europe from beginning of 21st century, for example, EU_13_A2, EU_6_A1 and EU_1_A1, are being replaced by several other emerging clones, including EU_37_A2. The objective this study was to determine whether main drivers success EU_37_A2 associated with decreased fungicide sensitivity, increased virulence and/or aggressiveness. Axenic P . cultures were sampled 2016 2017 growing seasons potato crops...
Abstract BACKGROUND Field experiments were carried out in 2016 and 2017 to study the influence of timing application nitrogen fertilizer (N‐fertilizer) on susceptibility potatoes early blight. We hypothesized that receive N‐fertilizer as split applications or a one‐time at emergence will have higher N content be less susceptible blight than those before planting. was applied either planting applications. RESULTS Potatoes did not more [high area under disease progress curve (AUDPC)] (low...
Forecasting systems are widely used to predict the application of fungicides for managing late blight. However, airborne inoculum has rarely been included in these forecasting systems. Monitoring sporangia crop environments may offer an opportunity improve blight forecast by integrating pathogen pressure. Hence, this experiment aiming analyze relationships between weather based risk and levels atmosphere potato crops. The experiments were conducted during two growing seasons a field. During...
Late blight, caused by Phytophthora infestans, is a major disease of the potato crop with strong negative impact on tuber yield and quality. The control late blight in conventional production systems often through weekly application prophylactic fungicides, moving away from sustainable system. In support integrated pest management practices, machine learning algorithms were proposed as tools to forecast aerobiological risk level (ARL) infestans (>10 sporangia/m3) inoculum new infections. For...
TOMCAST and two models (risk hours critical days) based on a generic infection model (GI model) were evaluated for the timing of fungicide application to control early blight (Alternaria solani) in field experiments. A five-year experiment was conducted at AU Flakkebjerg with starch potato cultivars Kardal (2016 & 2017), Avarna (2019 2020), Allstar (2021). Barley kernels infested Alternaria solani used inoculate potatoes. The disease assessed weekly, starting from onset first symptoms....
Abstract Field experiments were carried out in 2016 and 2017 to determine the effect of crop rotation on onset early blight three potato varieties Denmark. Six seven fields with different histories (rotation‐fields) used for 2017, respectively. The results showed that variety interaction between rotation‐field had no significant blight. Rotation‐field, other hand, a both years study. Early occurred earlier <2 subsequent crops than where potatoes have not been grown at least 2 years. was...
The use of pesticides is an efficient approach for pest management. However, their increasing application in recent decades has come under the spotlight world policies. In this context, study addresses usefulness a forecasting model (TOMCAST) combined with aerobiological information and plant development (physiological days, PDays) control early blight potatoes Northwest Spain. Control plots were compared to treated plots, according original TOMCAST daily Alternaria spp. concentration,...
Understanding the level and type of resistance in potato varieties is relevant for integrating varietal into management late blight. Accordingly, 54 were tested their to blight 2019 2020 Denmark. Spreader rows artificially inoculated ensure an even inoculum distribution trial. Disease severity was assessed once or twice per week. Cluster analysis (CA) done based on weighted mean absolute rate (WMAR), relative area under disease progress curve, onset (Xo), middle season, time reach 1%...
Abstract The genetic basis of the resistance potatoes to Phytophthora infestans is well‐studied. Plant P. genetically controlled, and secondary metabolites play a role, but themselves (e.g., phenylpropanoids) are poorly understood. This study aimed characterize effects two isolates host on metabolite expression in potato plants. To do this, phenylpropanoid pathway, chlorogenic acid, flavonoids, salicylic acid jasmonic elicitors were characterized. late blight‐susceptible cultivar (Jutlandia)...
Secondary infections of early blight during potato crop season are conditioned by aerial inoculum. However, although aerobiological studies have focused on understanding the key factors that influence spore concentration in air, less work has been carried out to predict when critical concentrations conidia occur. Therefore, goals this study were understand weather variables affect hourly and daily dispersal