A5031538850- Plant Pathogens and Fungal Diseases
- Plant Disease Management Techniques
- Plant Pathogens and Resistance
- Nematode management and characterization studies
- Plant-Microbe Interactions and Immunity
- Yeasts and Rust Fungi Studies
- Plant Disease Resistance and Genetics
- Plant pathogens and resistance mechanisms
- Entomopathogenic Microorganisms in Pest Control
- Plant Virus Research Studies
- Mycorrhizal Fungi and Plant Interactions
- Plant Pathogenic Bacteria Studies
- Plant and animal studies
- Bioenergy crop production and management
- Plant Parasitism and Resistance
- Plant and Fungal Interactions Research
- Powdery Mildew Fungal Diseases
- Mycotoxins in Agriculture and Food
- Legume Nitrogen Fixing Symbiosis
- Genetic diversity and population structure
- Insect Pest Control Strategies
- Insect symbiosis and bacterial influences
- Forest Insect Ecology and Management
- Turfgrass Adaptation and Management
- Fungal Biology and Applications
University of Tennessee at Knoxville
2015-2024
Plant (United States)
2016-2023
Agricultural Research Service
2011-2015
Tennessee Valley Authority
2015
National Institute for Mathematical and Biological Synthesis
2014
Texas A&M University System
2011
North Carolina State University
1990-1992
Washington State University
1990-1992
Pseudomonas fluorescens 2-79RN(10) protects wheat against take-all disease caused by Gaeumannomyces graminis var. tritici; however, the level of protection in field varies from site to site. Identification soil factors that exert greatest influence on suppression is essential improving biocontrol. In order assess relative importance 28 properties suppression, seeds were treated with strain (which produces phenazine-1-carboxylate [PCA(+)]) or a series mutants PCA(+) and PCA(-) phenotypes....
ABSTRACT Trichoderma koningii, originally isolated from a take-all-suppressive soil in Western Australia, has been shown to protect wheat against take-all disease and increase grain yield field trials China, the United States. However, within region, level of protection provided by T. koningii can dramatically vary between sites. We evaluated suppression this fungus eight silt loams Pacific Northwest States influence 21 abiotic parameters on biocontrol activity. While significantly increased...
The potential of species Fusarium to cause significant economic losses in Cannabis sativa due plant diseases and mycotoxin residues is the subject this review. Sixteen , reported as associated with cannabis production, are classified six complexes: oxysporum, F. solani, incarnatum-equiseti, sambucinum, tricinctum fujikuroi . Taxonomy genus debate, removal solani Species Complex genus, Neocosmospor a, has been proposed. Many C. also opportunistic pathogens humans animals. produce a myriad...
Pseudomonas fluorescens 2-79 (NRRL B-15132) and its rifampicin-resistant derivative 2-79RN 10 are suppressive to take-all of wheat caused by Gaeumannomyces graminis var. tritici. Production the antibiotic phenazine-1-carboxylic acid (PCA) is primary mechanism suppression this strain, while a fluorescent siderophore second iron-regulated factor have minor roles. Hyphal growth G. g. tritici was inhibited strain on modified Kanner agar (KMPE) (used for PCA production) adjusted several pH values...
Anaerobic soil disinfestation (ASD) is a biologically based, non-fumigant, pre-plant treatment developed to control soilborne plant pathogens and plant-parasitic nematodes in specialty crop production systems. Soil by ASD includes the incorporation of labile carbon (C) source, tarping with plastic, irrigation topsoil saturation (5 cm irrigation) create conditions conducive anaerobic decomposition added C source. A field study was implemented beginning Fall 2010 repeated same plot locations...
Plants in the genus Monarda produce complex essential oils that contain antifungal compounds. The objectives of this research were to identify selections monarda reduce Rhizoctonia damping-off tomato, and determine relationships between oil composition 13 herbages (dried ground leaves) disease suppression. Herbages grouped into five chemotypes, based on effective concentrations for reducing growth by 50% solani. Replicated repeated control assays conducted with greenhouse medium, or without...
Co-infection of potyviruses with taxonomically diverse plant viruses results in disease synergism and elevation the level accumulation non-potyviruses involved. In majority cases, however, remains essentially unaltered. A few potyviruses, such as Soybean mosaic virus (SMV), naturally infect soybean (Glycine max). is also a natural host to number including Alfalfa (AMV), which causes mild symptoms often associated symptom remission. We have now studied interactions between AMV SMV on severity...
Growth chamber and field studies were conducted with organic amendment mixtures of carbon (C) nitrogen (N) at C:N ratios 10:1, 20:1, 30:1, 40:1 rates C 2, 4, 6, 8 mg/g soil (C:N ratio 30:1) to evaluate anaerobic disinfestation (ASD) effects on germination colonization Sclerotium rolfsii. In the growth chamber, sclerotial was reduced in all ASD treatments regardless (0.6 8.5% germination) or rate (7.5 46%) as compared nonamended controls (21 36% 61 96%, respectively). treatment increased...
Nontoxic alternatives to chemical soil fumigants for suppressing soilborne pathogens such as
Abstract Beauveria bassiana endophytically colonises corn (Zea mays) reducing tunneling from European borer (Ostrinia nubilalis). Endophytic colonisation of other plants by B. has been reported, and potentially, may reduce insect feeding on these plants. We evaluated the effects larval growth development, mortality different rates dried, ground mycelia water-soluble metabolites fermentation broth culture isolates incorporated into a synthetic diet fed to neonate bollworm, Helicoverpa zea...
Interdisciplinary research centers are typically viewed as a vehicle for creating opportunities in science where the intricacy of problem calls persistent collaboration across multiple disciplines. This case study analyzed effects an interdisciplinary center on publication and behaviors faculty affiliated with center. The also sought to determine through interviews what factors contributed these participants whose were most changed after affiliation. Results indicate that affiliation has...
A meta-analysis of anaerobic soil disinfestation (ASD) efficacy against Fusarium oxysporum and F. f. sp. lycopersici was conducted emphasizing effects environment organic amendment characteristics pot field studies on ASD C:N ratio temperature inoculum survival. In a study, two amendments, dry molasses-based or wheat bran-based, applied at 4 mg C/g soil, with 40:1, 30:1, 20:1, 10:1 ratios, were evaluated 15 to 25°C. This study followed by regimes 25°C 25 35°C ratios (20:1 40:1), 30:1 lower C...
Dollar spot, caused by Sclerotinia homoeocarpa F.T. Bennett, is a common foliar disease on golf courses. Of 284 isolates collected from Tennessee and northern Mississippi, 90 were tested for in vitro resistance to three commonly used fungicides. The estimated fungicide concentration required inhibit growth 50 90% varied among locations. Isolates at seven locations resistant iprodione, whereas propiconazole only one location. five thiophanate‐methyl. Some showed 1000 μg a.i. mL −1 iprodione...
Strawberry (Fragaria × ananassa Duch) in Tennessee is cultivated on plastic mulched beds annually, and production limited primarily by multiple oomycete fungal root rot pathogens that result reduced vigor black disease symptoms. In early June 2018, plants (cv. Chandler) with shoot size, black, necrotic stunted roots were collected from Rhea County, TN. Roots crowns of 10 cut into 1-3 cm pieces surface sterilized 0.6% NaOCl, followed 70% ethanol for 1 min each, plated water agar. White...
Root diseases, namely take‐all caused by Gaeumannomyces graminis (Sacc.) Arx & D. Olivier var. tritici J. Walker, Rhizoctonia root rot R. solani Kühn AG8, and Pythium several Pringsh. species, become yield‐limiting to wheat ( Triticum aestivum L.) barley Hordeum vulgare in the Inland Pacific Northwest when these crops are grown without adequate rotation, especially direct‐seed (no‐till) systems. We tested whether yields of could be increased (i) pairing rows rather than spacing them...