A5052213640- Plant Pathogens and Fungal Diseases
- Mycotoxins in Agriculture and Food
- Plant Disease Resistance and Genetics
- Plant Pathogens and Resistance
- Wheat and Barley Genetics and Pathology
- Yeasts and Rust Fungi Studies
- Banana Cultivation and Research
- Plant Pathogenic Bacteria Studies
- Plant Disease Management Techniques
- Fungal Plant Pathogen Control
- Phytoplasmas and Hemiptera pathogens
- Smart Agriculture and AI
- Plant pathogens and resistance mechanisms
- Genetics and Plant Breeding
- Forest Insect Ecology and Management
- Cocoa and Sweet Potato Agronomy
- Soybean genetics and cultivation
- Leaf Properties and Growth Measurement
- Plant-Microbe Interactions and Immunity
- Plant Virus Research Studies
- Agricultural and Food Sciences
- Horticultural and Viticultural Research
- Indoor Air Quality and Microbial Exposure
- Nematode management and characterization studies
- Soil Management and Crop Yield
Universidade Federal de Viçosa
2016-2025
Instituto de Fisiología Vegetal
2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2024
Universidade de Passo Fundo
2021
International Maize and Wheat Improvement Center
2021
Jimma University
2020
Universidade Federal do Rio Grande do Sul
2008-2017
Institut National Polytechnique de Toulouse
2017
Université de Toulouse
2017
AGroecologies, Innovations & Ruralities
2017
Abstract The severity of plant diseases, traditionally the proportion tissue exhibiting symptoms, is a key quantitative variable to know for many diseases and prone error. Good quality disease data should be accurate (close true value). Earliest quantification was by visual estimates. Sensor-based image analysis including visible spectrum hyperspectral multispectral sensors are established technologies that promise substitute, or complement ratings. Indeed, these have measured accurately...
Scientific communication is facilitated by a data-driven, scientifically sound taxonomy that considers the end-user's needs and established successful practice. In 2013, Fusarium community voiced near unanimous support for concept of represented clade comprising all agriculturally clinically important species, including F. solani species complex (FSSC). Subsequently, this was challenged in 2015 one research group who proposed dividing genus into seven genera, FSSC described as members...
A multiyear survey of >200 wheat fields in Paraná (PR) and Rio Grande do Sul (RS) states was conducted to assess the extent distribution Fusarium graminearum species complex (FGSC) diversity southern Brazilian agroecosystem. Five three trichothecene genotypes were found among 671 FGSC isolates from head blight (FHB)-infected heads: F. (83%) 15-acetyldeoxynivalenol (15-ADON) genotype, meridionale (12.8%) asiaticum (0.4%) nivalenol (NIV) cortaderiae (2.5%) austroamericanum (0.9%) with either...
A sample of 50 isolates, including 25 each the 3-acetyldeoxynivalenol and 15-acetyldeoxynivalenol trichothecene genotype, from a contemporary collection Fusarium graminearum associated with head blight (FHB) wheat in New York varied sensitivity to tebuconazole (effective concentration leading 50% reduction mycelial growth [EC50] 0.28 8.09 mg/liter; μ = 1.12 mg/liter) metconazole (0.05 0.86 0.33). Mean did not differ between genotype groups. Isolate Gz448NY11 Steuben County is first...
Abstract Plant disease quantification, mainly the intensity of symptoms on individual units (severity), is basis for a plethora research and applied purposes in plant pathology related disciplines. These include evaluating treatment effect, monitoring epidemics, understanding yield loss, phenotyping host resistance. Although sensor technology has been available to measure severity using visible spectrum or other spectral range imaging, it visual sensing perception that still dominates,...
Although Asian soybean rust occurs in a broad range of environmental conditions, the most explosive and severe epidemics have been reported seasons with warm temperature abundant moisture. Associations between weather previously, but attempts to identify major factors model these relationships field data limited specific locations. Using from 2002-03 2004-05 34 experiments at 21 locations Brazil that represented all production areas, we attempted variables using 1-month time window following...
Abstract Fusarium head blight is a major concern for wheat production worldwide. The fungi that cause the disease may infect tissues from flowering to late stages of kernel development, but better understanding influence time infection on grain weight reduction and mycotoxin accumulation resulting process needed. We investigated reproductive stage at inoculation quality parameters, especially deoxynivalenol (DON) in mature grains. Heads Norm were spray inoculated with macroconidial...
A three-year (2006–2008) survey on commercial wheat grain was conducted aimed at quantifying the intensity of Fusarium head blight epidemics related to kernel quality and levels deoxynivalenol (DON) nivalenol (NIV). Grain samples, obtained from 38 municipalities throughout state Rio Grande do Sul, Brazil, were assessed visually for Fusarium-damaged kernels (FDK) chemically using liquid chromatography–mass spectrometry (LC–MS/MS). Overall FDK mean 15.5%, not differing among years....
This study aimed to assess the extent and distribution of F usarium graminearum species complex ( FGSC ) diversity in rice seeds produced southern B razil. Four two trichothecene genotypes were detected among 89 isolates, based on a multilocus genotyping assay: . asiaticum (69·6%) with nivalenol NIV genotype, (14·6%) 15‐acetyldeoxynivalenol ADON cortaderiae meridionale (1·1%), both genotype. Seven selected isolates from rice‐based substrate vitro , at levels ranging 4·7 84·1 μ g −1...
Abstract Soybean rust (SBR), caused by Phakopsora pachyrhizi , is the most important yield‐damaging fungal disease of soybean due to severe reduction in healthy leaf area and acceleration fall. In experimental research, SBR severity estimated visually aided/trained a standard diagram (SAD) developed validated during mid‐2000s (Old SAD). this study, we propose new SAD set for with six true‐colour diagrams following linear increments (c. 15% increments) amended four additional at low (<10%)...
Abstract Phytopathometry can be defined as the branch of plant pathology (phytopathology) that is concerned with estimation or measurement amount disease expressed by symptoms signs a pathogen on single group specimens. critical for many reasons, including analyzing yield loss due to disease, breeding resistance, evaluating and comparing control methods, understanding coevolution, studying epidemiology ecology. underpins all activities in extends into related disciplines, such agronomy,...
Abstract Most plant pathogens exhibit host specificity but when former barriers to infection break down, new diseases can rapidly emerge. For a number of fungal diseases, there is increasing evidence that hybridization plays major role in driving jumps. However, the relative contributions existing variation versus mutations adapting host(s) unclear. Here we reconstruct evolutionary history two recently emerged populations fungus Pyricularia oryzae are responsible for diseases: wheat blast...
A total of 82 fungal isolates was obtained from wheat kernel samples affected by fusarium head blight collected 20 locations in southern Brazil. Polymerase chain reaction (PCR) assays were used to characterize trichothecene mycotoxin genotypes [deoxynivalenol (DON), nivalenol (NIV) and two acetylated derivatives DON]. To identify that producing DON NIV, portions the Tri13 gene amplified. 3‐acetyl‐deoxynivalenol (3‐ADON) 15‐acetyl‐deoxynivalenol (15‐ADON) genotypes, Tri3 Tri12 Nearly all...
Abstract The frequency of Fusarium head blight (FHB) outbreaks increased considerably in many countries the last two decades. We used a crop‐disease model to assess impacts climate variability over 50‐year period at Passo Fundo, Rio Grande do Sul, Brazil. Thirty individual simulation runs wheat were performed for each year by varying planting dates from 1 June 30 June. For simulation, an FHB risk index was estimated with disease using heading date simulated crop model. A seasonal averaging...
Sooty blotch and flyspeck (SBFS) fungi colonize the surface wax layer of fruit apple, pear, persimmon, banana, orange, papaya, several other cultivated tree vine crops. In addition to colonizing crops, SBFS also grow on surfaces stems, twigs, leaves, a wide range wild plants. The disease occurs worldwide in regions with moist growing seasons. is regarded as serious by growers plant pathologists because it can cause substantial economic damage. smudges stipples often result downgrading from...