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Comparative Genomics And Virulence Studies Of Streptomyces Soil Rot And Scab Pathogen Species, Natasha Soares
Comparative Genomics And Virulence Studies Of Streptomyces Soil Rot And Scab Pathogen Species, Natasha Soares
LSU Doctoral Dissertations
Comparative genomic analyses were performed to gain insights into the organization and content of the genome of Streptomyces ipomoeae, the soil rot pathogen that infects sweetpotatoes. Unlike Streptomyces scab pathogens, the thaxtomin phytotoxin gene cluster (txt) in S. ipomoeae does not appear to reside within a genomic island and has diverged from its scab pathogen counterparts. Increased usage of the rare TTA codon, particularly for the txt cluster, suggests greater translational control by the bldA tRNA in S. ipomoeae. Orthologous gene searches and secondary metabolite profiling yielded ortholog groups and metabolite gene clusters that were exclusive …
Using Uav Technology Paired With Multispectral Cameras To Assess Crown Rust Epidemics In Oats, Turner A. Graham
Using Uav Technology Paired With Multispectral Cameras To Assess Crown Rust Epidemics In Oats, Turner A. Graham
LSU Master's Theses
Crown rust, caused by Puccinia cornonata f. sp. avenae, is a common disease of oats (Avena sativa) found virtually everywhere oats are cultivated. This disease has caused yield losses of 10 to 40% worldwide. Early detection is important for effective management. A more recently utilized technology in agriculture is unmanned aerial vehicles (UAVs). UAVs, or drones, equipped with cameras are now being used as a resource to take images of fields to identify pests and other issues that may be occurring. Normalized differentiated vegetative index (NDVI) is a numerical indicator used to determine the vegetative health of …
Effects Of Iron On Cercospora Leaf Blight Of Soybean, Eduardo Chagas Ferreira Da Silva
Effects Of Iron On Cercospora Leaf Blight Of Soybean, Eduardo Chagas Ferreira Da Silva
LSU Master's Theses
Cercospora leaf blight (CLB) of soybean caused by Cercospora kikuchii is an important disease in Lousiana. Preliminary screening of foliar applications of the micronutrients Fe, Mn, Cu, Zn, B, Mo and Al, showed that Fe decreased CLB severity consistently. The objective of this work was to test the effects of commercial formulations of Fe, Manny Plex Fe and Fe EDTA (Brandt Consolidated, Springfield, IL) on leaf colonization by C. kikuchii, symptom development (blight and purple leaves), and yield. Four rates of Manny Plex Fe and four rates of Fe EDTA were applied to field plots at R5 growth stage. Leaf …
Simplicillium Lanosoniveum, A Mycoparasite Of Phakopsora Pachyrhizi And Its Use As A Biological Control Agent, Nicole A. Ward
Simplicillium Lanosoniveum, A Mycoparasite Of Phakopsora Pachyrhizi And Its Use As A Biological Control Agent, Nicole A. Ward
LSU Doctoral Dissertations
In 2007, a filamentous fungus was recovered from sori of soybean rust (SBR), caused by Phakopsora pachyrhizi, collected from Louisiana and Florida. This fungus was identified as Simplicillium lanosoniveum on the basis of ITS sequence data and morphological traits. Simplicillium lanosoniveum was found coiling within sori and around urediniospores and showed a trophic attraction to rust sori, extending from sorus to sorus. In co-inoculated soybean leaves, the fungus did not grow or establish on leaf surfaces until sori erupted. Similarly, S. lanosoniveum colonized within 3 days and sporulated within 4 days on leaves showing disease symptoms. In field studies, when …
A Comparison Of Soil And Corn Kernel Aspergillus Flavus Populations: Evidence For Niche Specialization, Rebecca Ruth Sweany
A Comparison Of Soil And Corn Kernel Aspergillus Flavus Populations: Evidence For Niche Specialization, Rebecca Ruth Sweany
LSU Master's Theses
Aspergillus flavus is an opportunistic fungal pathogen that infects peanuts, cotton, corn and tree nuts. Aspergillus flavus is a major problem globally due to the production of acutely toxic and carcinogenic aflatoxins. Louisiana climatic conditions lead to annual threats of corn aflatoxin contamination. The purpose of this study was to determine the specific ability of different strains of A. flavus to infect corn. Five soil samples and 10 corn ears were collected from each of seven corn fields throughout Louisiana. In addition, Francis Deville of Monsanto Company collected 7, 6, 2, and 4 soil samples and corn ears from four …
Studies On Control Of Root Rot And Dieback Of Camellias ., Luther Willis Baxter
Studies On Control Of Root Rot And Dieback Of Camellias ., Luther Willis Baxter
LSU Historical Dissertations and Theses
No abstract provided.
Rhizoctonia Aerial Blight Of Lespedeza., William Hugh Stroube
Rhizoctonia Aerial Blight Of Lespedeza., William Hugh Stroube
LSU Historical Dissertations and Theses
No abstract provided.
Studies On The White Tip Disease Of Rice., Edwin Harkness Todd
Studies On The White Tip Disease Of Rice., Edwin Harkness Todd
LSU Historical Dissertations and Theses
No abstract provided.
Studies On The Cause And Transmission Of A Louisiana Citrus Disease Similar To Tristeza., Charles Adam Schexnayder
Studies On The Cause And Transmission Of A Louisiana Citrus Disease Similar To Tristeza., Charles Adam Schexnayder
LSU Historical Dissertations and Theses
No abstract provided.
Studies Of Vetch Anthracnoses., Norman Louis Horn
Studies Of Vetch Anthracnoses., Norman Louis Horn
LSU Historical Dissertations and Theses
No abstract provided.
Two Fungus Diseases Of Soybeans., Quintin Lee Holdeman
Two Fungus Diseases Of Soybeans., Quintin Lee Holdeman
LSU Historical Dissertations and Theses
No abstract provided.
Studies On Method Of Infection And Control Of The Red Rot Fungus Of Sugarcane., Rene John Steib
Studies On Method Of Infection And Control Of The Red Rot Fungus Of Sugarcane., Rene John Steib
LSU Historical Dissertations and Theses
No abstract provided.
Studies Of Black-Scale Disease Of Easter Lily., Frank J. Reynolds
Studies Of Black-Scale Disease Of Easter Lily., Frank J. Reynolds
LSU Historical Dissertations and Theses
No abstract provided.
Leaf Diseases Of Sorghum., Douglas C. Bain
Leaf Diseases Of Sorghum., Douglas C. Bain
LSU Historical Dissertations and Theses
No abstract provided.
Hot Water Treatment Of Sugarcane., Chuin Shuh Loh
Hot Water Treatment Of Sugarcane., Chuin Shuh Loh
LSU Historical Dissertations and Theses
No abstract provided.
Seed Treatment For The Control Of Bean Blight., Kermit William Kreitlow
Seed Treatment For The Control Of Bean Blight., Kermit William Kreitlow
LSU Historical Dissertations and Theses
No abstract provided.