Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 4 of 4
Full-Text Articles in Life Sciences
Fire Ant Venom Alkaloids: Possible Control Measure For Soilborne And Foliar Plant Pathogens, Sujan Dawadi, Fulya Baysal-Gurel, Karla M. Addesso, Prabha Liyanapathiranage, Terri Simmons
Fire Ant Venom Alkaloids: Possible Control Measure For Soilborne And Foliar Plant Pathogens, Sujan Dawadi, Fulya Baysal-Gurel, Karla M. Addesso, Prabha Liyanapathiranage, Terri Simmons
Agricultural and Environmental Sciences Faculty Research
The purpose of this study was to evaluate fire ant venom alkaloids and an alarm pheromone analog against several plant pathogens, including Botrytis cinerea, Fusarium oxysporum, Phytophthora nicotianae, P. cryptogea, Pseudomonas syringae, Phytopythium citrinum, Rhizoctonia solani, Sclerotonia rolfsii, Xanthomonas axonopodis, and X. campestris. All pathogens were tested against red imported fire ant venom alkaloid extract and alarm pheromone compound for growth inhibition in in vitro assay. The venom alkaloid extract inhibited fungal and oomycete pathogens. Neither of the treatments were effective against bacterial pathogens. Three soilborne pathogens, P. nicotianae, R. solani, F. oxysporum, and one foliar pathogen, B. cinerea were …
Methods For Management Of Soilborne Diseases In Crop Production, Milan Panth, Samuel C. Hassler, Fulya Baysal-Gurel
Methods For Management Of Soilborne Diseases In Crop Production, Milan Panth, Samuel C. Hassler, Fulya Baysal-Gurel
Agricultural and Environmental Sciences Faculty Research
The significant problems caused by soilborne pathogens in crop production worldwide include reduced crop performance, decreased yield, and higher production costs. In many parts of the world, methyl bromide was extensively used to control these pathogens before the implementation of the Montreal Protocol—a global agreement to protect the ozone layer. The threats of soilborne disease epidemics in crop production, high cost of chemical fungicides and development of fungicide resistance, climate change, new disease outbreaks and increasing concerns regarding environmental as well as soil health are becoming increasingly evident. These necessitate the use of integrated soilborne disease management strategies for crop …
Impact Of Cover Crop Usage On Soilborne Diseases In Field Nursery Production, Sujan Dawadi, Fulya Baysal-Gurel, Karla M. Addesso, Jason B. Oliver, Terri Simmons
Impact Of Cover Crop Usage On Soilborne Diseases In Field Nursery Production, Sujan Dawadi, Fulya Baysal-Gurel, Karla M. Addesso, Jason B. Oliver, Terri Simmons
Agricultural and Environmental Sciences Faculty Research
Soilborne pathogens are a significant economic problem for nursery production in the Southeastern United States. The goal of this study was to determine the impact of cover crops on soilborne disease suppressiveness in such systems. Soils from red maple (Acer rubrum L.) plantation fields grown with and without cover crops were sampled, either while the cover crops were growing (pre-disked) or post-season, following cover crop incorporation into the soil (post-disked). Greenhouse bioassays were conducted using red maple seeds on inoculated (with Rhizoctonia solani (J.G. Kühn) or Phytophthora nicotianae (Breda de Haan)) and non-inoculated field soils. The damping-off, root rot disease …
Flowering Dogwood Infections With Macrophomina Phaseolina, Margaret T. Mmbaga, Lucas A. Mackasmiel, Frank A. Mrema
Flowering Dogwood Infections With Macrophomina Phaseolina, Margaret T. Mmbaga, Lucas A. Mackasmiel, Frank A. Mrema
Agricultural and Environmental Sciences Faculty Research
Macrophomina phaseolina was isolated from the crown region and roots of mature flowering dogwood (Cornus florida L.) trees in the landscape and nursery plantings. Although this pathogen has been reported in Cornus species, its occurrence and impact on C. florida has not been reported. Pathogenicity tests were conducted on dogwood seedlings, and all inoculated seedlings developed root necrotic lesions and no small lateral roots, whereas the non-inoculated control seedlings remained disease-free and developed numerous small roots. Seedlings inoculated with M. phaseolina exhibited numerous microsclerotia, but non-inoculated seedlings did not. In greenhouse experiments, plants inoculated on the stems near the soil …