A5054421485- Plant Pathogens and Fungal Diseases
- Plant and Fungal Interactions Research
- Plant Pathogens and Resistance
- Forest Insect Ecology and Management
- Yeasts and Rust Fungi Studies
- Mycorrhizal Fungi and Plant Interactions
- Plant Pathogenic Bacteria Studies
- Plant Virus Research Studies
- Plant Disease Resistance and Genetics
- Plant-Microbe Interactions and Immunity
- Plant and fungal interactions
- Legume Nitrogen Fixing Symbiosis
- Mycotoxins in Agriculture and Food
- Fungal Biology and Applications
- Genomics and Phylogenetic Studies
- Vector-Borne Animal Diseases
- Nematode management and characterization studies
- Botanical Research and Chemistry
- Wheat and Barley Genetics and Pathology
- Plant Disease Management Techniques
- Metabolomics and Mass Spectrometry Studies
- Gut microbiota and health
- Soil Carbon and Nitrogen Dynamics
- Crop Yield and Soil Fertility
- Genetics and Plant Breeding
National Center for Agricultural Utilization Research
2021-2024
Agricultural Research Service
2021-2024
Smithsonian Tropical Research Institute
2019-2024
Colorado State University
2016-2022
University of New Hampshire
2012-2017
University of New Hampshire at Manchester
2017
Animal and Plant Health Inspection Service
2017
United States Department of Agriculture
2017
University of Nebraska–Lincoln
2017
University of Florida
2017
Annual decreases in corn yield caused by diseases were estimated surveying members of the Corn Disease Working Group 22 corn-producing states United States and Ontario, Canada, from 2012 through 2015. Estimated loss each disease varied greatly state year. In general, foliar such as northern leaf blight, gray spot, Goss's wilt commonly largest Ontario during non-drought years. Fusarium stalk rot plant-parasitic nematodes most southern-most States. The mean economic due to 2015 was $76.51 USD...
Accurate species-level identification of an etiological agent is crucial for disease diagnosis and management because knowing the agent's identity connects it with what known about its host range, geographic distribution, toxin production potential. This particularly true in publishing peer-reviewed reports, where imprecise and/or incorrect identifications weaken public knowledge base. can be a daunting task phytopathologists other applied biologists that need to identify Fusarium...
Many members of the
New species: Phytophthora amamensis T. Jung, K. Kageyama, H. Masuya & S. Uematsu, angustata L. Garcia, B. Mendieta-Araica, Y. Balci, balkanensis I. Milenković, Ž. Tomić, Jung M. Horta borneensis A. Durán, Tarigan calidophila Garcia catenulata T.-T. Chang, N.M. Chi celeris Oliveira, curvata Hieno, distorta E. Sanfuentes von Stowasser excentrica Kageyama C.M. Brasier, falcata Uematsu fansipanensis Chi, Corcobado frigidophila Broders furcata Milenković inclinata indonesiensis Tarigan,...
Fusarium graminearum is an important pathogen of cereal crops in Ohio causing primarily head blight wheat and stalk ear rot corn. During the springs 2004 2005, 112 isolates F. were recovered from diseased corn soybean seedlings 30 locations 13 counties. These evaluated vitro pathogenicity assay on both seed, 28 tested for sensitivity to seed treatment fungicides azoxystrobin, trifloxystrobin, fludioxonil, captan. All highly pathogenic moderately seed. Fludioxonil was only fungicide that...
Cool, moist conditions in combination with minimum tillage, earlier planting, and recent shifts commercial fungicide seed-treatment active ingredients have led to an increase corn (Zea mays) soybean (Glycine max) seedling establishment problems. This situation resulted investigation of Pythium spp. associated seed diseases. Samples diseased seedlings were collected from 42 production fields Ohio. All isolates recovered identified species using morphological molecular techniques evaluated...
Species within Fusarium are of global agricultural, medical, and food/feed safety concern have been extensively characterized. However, accurate identification species is challenging usually requires DNA sequence data. FUSARIUM-ID (http://isolate.fusariumdb.org/blast.php) a publicly available database designed to support the using sequences multiple phylogenetically informative loci, especially highly ∼680-bp 5' portion translation elongation factor 1-alpha (TEF1) gene that has adopted as...
A high-throughput baiting and identification process identified more than 7,000 isolates of Pythium from 88 locations in Ohio. Isolates were using direct-colony polymerase chain reaction followed by single-strand conformational polymorphism, communities assembled the Jaccard similarity coefficient cluster analysis. Both univariate multivariate statistics used to evaluate differences soil properties between communities, canonical discriminant analysis (CDA) was assess strength association...
Fusarium graminearum causes seed decay and damping-off of soybean. This study evaluated the effect inoculum density F. graminearum, temperature, fungicide treatments on disease development. To determine optimum conditions for development, individual soybean was inoculated with 100 μl a suspension 2.5 × 102, 103, 104, or 105 macroconidia/ml in rolled-towel assay at temperatures 18, 22, 25°C. Inoculum concentrations 104 higher were necessary development all temperatures. The efficacy captan,...
The ascomycete Geosmithia morbida and the walnut twig beetle Pityophthorus juglandis are associated with thousand cankers disease of Juglans (walnut) Pterocarya (wingnut). was first reported in western United States (USA) on several species, but has been found more recently eastern USA native range highly susceptible nigra. We performed a comprehensive population genetic study 209 G. isolates collected from 17 geographic regions distributed across 12 U.S. states. based sequence typing 27...
Bacterial leaf streak of corn (Zea mays) recently reached epidemic levels in three corn-growing states, and has been detected another six states the central United States. Xanthomonas vasicola was identified as causal agent this disease. A multilocus sequence alignment housekeeping genes comparison average nucleotide identity from draft genome were used to confirm phylogenetic relationships classification bacteria relative other X. strains. isolates Nebraska South Africa highly virulent on...
Eastern white pine is a crucial ecological and economic component of forests in the northern USA eastern Canada, now facing an emerging problem needle damage (WPND). It still unclear whether WPND results from one, or combination several fungal pathogens. Therefore, first objective this study was to characterize fungi associated with northeastern United States document being done mature as result repeated defoliation. To date, 22 species fungi, either cultured diseased needles formed fruiting...
The defoliation of the eastern white pine (Pinus strobus) across northeastern United States is an escalating concern threatening ecological health northern forests and economic vitality region's lumber industry. First documented in spring 2010 affecting 24 328 hectares state Maine, needle damage (WPND) has continued to spread now well established all New England states. While causal agents WPND are known, current research lacking both sampling distribution specific environmental factor(s)...
Many Fusarium oxysporum formae speciales produce small, infection-dependent effector proteins called “secreted in xylem” (SIX) proteins. These are secreted into the xylem of a plant during infection process and thought to promote virulence. In this study, collection isolates composed primarily different races f. sp. vasinfectum (FOV) was screened for presence 14 SIX genes ( SIX1 SIX14). Our results showed that some most virulent FOV races, FOV4 FOV7, share common effector: SIX9. This is...
Summary Host‐specialized pathogens are credited with the maintenance of tropical forest diversity under Janzen–Connell hypothesis. Yet, in diverse forests, selection may favor broad host ranges, given their passive dispersal and relative rarity tree species. We surveyed associations potential isolated from symptomatic seedlings forests Panama used inoculations to assess pathogenicity ranges 27 fungal isolates, differences among species susceptibility. Thirty‐one 33 nonsingleton operational...
Stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most devastating diseases wheat globally. Since 2000, geographic footprint Pst has increased in North America due to a combination changing weather patterns and introductions new more virulent strains. endemic throughout America, but emergence strains poses an risk cultivation. As climate changes, so will overwintering over-summering range this pathogen, resulting earlier severe disease epidemics central eastern...
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Abstract The genus Claviceps has been known for centuries as an economically important fungal pharmacology and agricultural research. Only recently have researchers begun to unravel the evolutionary history of genus, with origins in South America classification four distinct sections through ecological, morphological, metabolic features (Claviceps sects. Citrinae, Paspalorum, Pusillae, Claviceps). first three are additionally characterized by narrow host range, whereas section is considered...
Pangenome analyses are increasingly being utilized to study the evolution of eukaryotic organisms. While pangenomes can provide insight into polymorphic gene content, inferences about ecological and adaptive potential such organisms also need be accompanied by additional supportive genomic analyses. In this we constructed a pangenome Claviceps purpurea from 24 genomes examined positive selection recombination landscape an economically important fungal organism for pharmacology agricultural...