A5073465501- Plant Pathogens and Fungal Diseases
- Plant Pathogens and Resistance
- Plant Disease Resistance and Genetics
- Yeasts and Rust Fungi Studies
- Plant Disease Management Techniques
- Plant Pathogenic Bacteria Studies
- Plant-Microbe Interactions and Immunity
- Soybean genetics and cultivation
- Nematode management and characterization studies
- Plant pathogens and resistance mechanisms
- Plant Virus Research Studies
- Mycotoxins in Agriculture and Food
- Wheat and Barley Genetics and Pathology
- Fungal Plant Pathogen Control
- Animal Disease Management and Epidemiology
- Legume Nitrogen Fixing Symbiosis
- Crop Yield and Soil Fertility
- Genetics and Plant Breeding
- Agriculture and Farm Safety
- Bioenergy crop production and management
- Genetic and Environmental Crop Studies
- Plant and fungal interactions
- Vector-Borne Animal Diseases
- Berry genetics and cultivation research
- Forest Insect Ecology and Management
University of Minnesota
2016-2025
Twin Cities Orthopedics
2011-2024
Southern Illinois University Carbondale
2015-2017
Iowa State University
2015-2017
Michigan State University
2016
South Dakota State University
2016
University of Wisconsin–Madison
2001-2016
United States Department of Agriculture
2015
Agricultural Research Service
2015
Plant (United States)
2015
Annual decreases in soybean (Glycine max L. Merrill) yield caused by diseases were estimated surveying university-affiliated plant pathologists 28 soybean-producing states the United States and Ontario, Canada, from 2010 through 2014. Estimated losses each disease varied greatly state or province year. Over duration of this survey, cyst nematode (SCN) (Heterodera glycines Ichinohe) was to have more than twice as much loss any other disease. Seedling (caused various pathogens), charcoal rot...
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...
Annual reductions in corn (Zea mays L.) yield caused by diseases were estimated university Extension-affiliated plant pathologists 26 corn-producing states the United States and Ontario, Canada, from 2016 through 2019. Estimated loss each disease varied greatly state or province year. Gray leaf spot (caused Cercospora zeae-maydis Tehon & E.Y. Daniels) greatest parts of northern Ontario all years except 2019, Fusarium stalk rot spp.) also reduced yield. Tar Phyllachora maydis Maubl.), a...
Soybean (Glycine max [L.] Merrill) yield losses as a result of plant diseases were estimated by university and government pathologists in 29 soybean producing states the United States Ontario, Canada, from 2015 through 2019. In general, that resulted each 28 or pathogens varied state province well year. cyst nematode (SCN) (Heterodera glycines Ichinohe) caused more than twice much loss any other disease during survey period. Seedling (caused various pathogens), Sclerotinia stem rot (white...
Sclerotinia stem rot (also known as white mold) of soybean is a significant yield-limiting problem in the North Central production region. This disease, caused by fungus sclerotiorum (Lib.) de Bary, varies incidence and severity from year to because its sensitivity weather conditions. Losses can be substantial when environmental conditions management practices favor high yield potential. Employing disease plan based on knowledge field history best help reduce losses rot. An effective...
Oomycete pathogens are commonly associated with soybean root rot and have been estimated to reduce yields in the United States by 1.5 million tons on an annual basis. Limited information exists regarding frequency diversity of oomycete species across major soybean-producing regions North America. A survey was conducted 11 states province Ontario, Canada. In 2011, 2,378 cultures were isolated from seedling roots a semiselective medium (CMA-PARPB) identified sequencing internal transcribed...
Soybean (Glycine max (L.) Merr.) is produced across a vast swath of North America, with the greatest concentration in Midwest. Root rot diseases and damping-off are major concern for production, primary causal agents include oomycetes fungi. In this study, we focused on examination oomycete species distribution soybean production system how environmental soil (edaphic) factors correlate community composition at early plant growth stages. Using culture-based approach, 3,418 isolates were...
Pythium spp. cause seed decay, damping-off, and root rot in soybean corn; however, their diversity importance as pathogens Minnesota are unknown. Our objectives were to identify the present fields, determine aggressiveness on corn soybean, investigate sensitivity treatment fungicides. For identification, sequences obtained using internal transcribed space ITS4 ITS1 primers compared with reference National Center for Biotechnology Information database. Seedling soil samples yielded over 30...
Tar spot of corn has been a major foliar disease in several Latin American countries since 1904. In 2015, tar was first documented the United States and led to significant yield losses approximately 4.5 million t. is caused by an obligate pathogen, Phyllachora maydis, thus requires living host grow reproduce. Due its nature, biological epidemiological studies are limited impact production understudied. Here we present current literature gaps knowledge Americas, etiology, distribution, known...
The efficacy of copper bactericides for control Xanthomonas campestris pv. vesicatoria in eastern Oklahoma tomato fields was evaluated. Copper did not provide adequate control, and copper-resistant (Cu r ) strains the pathogen were isolated. Cu genes these located on a large indigenous plasmid designated pXV10A. host range pXV10A investigated; this efficiently transferred into 8 11 X. pathovars. However, transfer to other phytopathogenic genera detected. DNA hybridization experiments...
To determine the identity and diversity of endophytes in soybean plants using culture-dependent (CD) culture-independent (CI) methods.Stem samples were collected from three field-grown cultivars grown to a reproductive stage Minnesota, USA. Samples surface disinfested, CD CI methods used assess endophytes. For method, fungi isolated grouped based on colony morphology, rDNA ITS region was sequenced identify cultures. The most frequently genera Cladosporium (36%), Alternaria (13%), Diaporthe...
Existing crop monitoring programs determine the incidence and distribution of plant diseases pathogens assess damage caused within a production region. These have traditionally used observed or predicted disease pathogen data environmental information to prescribe management practices that minimize loss. Monitoring are especially important for crops with broad geographic can cause rapid great economic losses. Successful been developed several diseases, including downy mildew cucurbits,...
Pseudomonas syringae pv. tomato PT23.2 produces the chlorosis-inducing phytotoxin coronatine. Thirty-eight chlorosis-defective mutants of were previously generated by using transposon Tn5. Five contained Tn5 insertions in indigenous plasmid pPT23A; remaining 33 either missing pPT23A (29 mutants) or deletions this (4 mutants). These results suggested that was involved coronatine production strain PT23.2. This introduced into P. PS61, which does not produce A bioassay for PS61(pPT23A)...
Sudden death syndrome, caused by Fusarium virguliforme, is an important disease of soybean in the United States. Fifteen species crops, weeds, or prairie plants were evaluated for their potential as hosts F. virguliforme. Root and foliar symptoms plant biomass assessed following greenhouse inoculation studies. colonization virguliforme was determined with isolations polymerase chain reaction assays. Soybean, alfalfa, pinto navy bean, white red clover, pea, Canadian milk vetch developed root...
Macrophomina phaseolina causes charcoal rot, which can significantly reduce yield and seed quality of soybean dry bean resulting from primarily environmental stressors. Although rot has been recognized as a warm climate-driven disease increasing concern under global climate change, knowledge regarding population genetics climatic variables contributing to the genetic diversity M. is limited. This study conducted genome sequencing for 95 isolates across continental United States, Puerto Rico,...
Tar spot is a foliar disease of corn threatening production across the Americas. The was first documented in Mexico 1904 and now present 15 additional countries throughout Central America, South Caribbean. Researchers growers Caribbean consider tar to be complex caused by multiple fungal pathogens. When environmental conditions are conducive for infection, these regions have experienced yield losses that can reach up 100%. In 2015, detected United States time Illinois Indiana. Since has...
Corn stunt is one of the most significant corn diseases in Neotropics, leading to severe plant stunting and substantial yield losses. Although four pathogens have been found either singly or combination infected plants Americas, spiroplasma (Spiroplasma kunkelii) predominant pathogen associated with disease U.S., due its widespread distribution Rio Grande Valley region persistent occurrence California Florida. During 2024 growing season, reports chlorosis, leaf reddening, fields Southern,...
Phytophthora rot caused by sojae is a common and significant disease of soybean (Glycine max) in Illinois throughout the Midwestern United States. The pathogenic characteristics P. populations several states have been reported recently, but pathogenicity fungicide sensitivity traits were poorly understood. Isolates (n = 121) soybean-infecting spp. baited using susceptible cv. Sloan seedlings from field soils with history seedling diseases 24 counties across Illinois. pathotype race isolates...
Background Sudden death syndrome (SDS) of soybean caused by Fusarium virguliforme spreads and reduces yields through the North Central region U.S. The fungal pathogen Heterodera glycines are difficult to manage. Methodology/Principal Findings objective was determine contributions H. F. SDS severity effects on yield. To quantify DNA in roots soil, a specific real time qPCR assay developed. used materials from field microplots that contained four-factor factorial-design: (i) untreated or...
The ability to accurately detect and quantify Fusarium virguliforme, the cause of sudden death syndrome (SDS) in soybean, samples such as plant root tissue soil is extremely valuable for accurate disease diagnoses address research questions. Numerous quantitative real-time polymerase chain reaction (qPCR) assays have been developed this pathogen but their sensitivity specificity F. virguliforme not compared. In study, six qPCR were compared five independent laboratories using same set DNA...