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Articles 1 - 30 of 34
Full-Text Articles in Life Sciences
Administrator Perceptions Of Intramural Coed Flag Football Modifications: A Qualitative Analysis, Zacharias Wood
Administrator Perceptions Of Intramural Coed Flag Football Modifications: A Qualitative Analysis, Zacharias Wood
LSU Master's Theses
Coed sport environments can be paradoxical settings where pre-existing gender biases influence participants’ enjoyment and success. Furthermore, gendered messages and stereotypes as well as low expectations for females within coed sports can create participation barriers by reducing feelings of confidence and performance. Within Campus Recreation, intramural sport administrators have a significant role in determining participation opportunities and experiences. This investigation examined administrators’ perspectives about coed intramural flag football gender modifications. Specifically, three research questions guided this study: (a) how do intramural administrators view coed flag football gender modifications?; (b) to what extent do intramural administrators perceive gender modifications to impact …
A Revision And Phylogenetic Analysis Of The Genus Eutyphlus Leconte (Coleoptera: Staphylinidae: Pselaphinae) With A Comparison Of Sampling Methodologies, Brittany Elin Owens
A Revision And Phylogenetic Analysis Of The Genus Eutyphlus Leconte (Coleoptera: Staphylinidae: Pselaphinae) With A Comparison Of Sampling Methodologies, Brittany Elin Owens
LSU Master's Theses
My thesis research includes three components: (1) a methodology project, (2) a systematic project comprising a taxonomic revision, and (3) a morphology-based, cladistic analysis. 1. The methodological study compared the Winkler (Moczarski) eclector and the Berlese-Tullgren funnel (referred to hereafter as “Winkler” and “Berlese” funnels, respectively) as methods for extracting forest litter-dwelling Coleoptera from sifted substrate, with a focus on relevance for taxonomic studies. A general review of the history and methodologies of leaf litter arthropod extraction was provided, in conjunction with repeated, timed trials to compare the relative effectiveness of the two methods using litter samples from various geographic …
An Evaluation Of The Impact Of The Adoption Of The Onboard Module Building Cotton Harvest System On The Economic Competitiveness Of Cotton Production In Louisiana, Natalia Estefania Latorre
An Evaluation Of The Impact Of The Adoption Of The Onboard Module Building Cotton Harvest System On The Economic Competitiveness Of Cotton Production In Louisiana, Natalia Estefania Latorre
LSU Master's Theses
Planted acreage of cotton in Louisiana has decreased over the past several years due to higher cotton variable production costs, stagnant cotton market prices, and higher grain yields and market prices for corn and soybeans. The general objective was to determine the economic impact of the adoption and use of an onboard module building cotton harvest system on the ability of the cotton enterprise to compete for planted acreage in the mixed crop farming areas of Louisiana. Specific research objectives included the estimated of comparative ownership and operating costs for the module building harvest systems relative to existing basket/module builder …
Regulation Of Oocyte Meiotic Resumption Using Camp Modulators In Bovine In Vitro Maturation, Sarah Farmer
Regulation Of Oocyte Meiotic Resumption Using Camp Modulators In Bovine In Vitro Maturation, Sarah Farmer
LSU Master's Theses
In vitro maturation (IVM) is a reproductive technique critical to in vitro embryo production (IVP) in commercial livestock industries, research, and human infertility treatment. Currently, IVP has low efficiency due to an inadequate IVM system in which premature meiotic resumption results in low oocyte viability. Meiotic arrest is regulated primarily by 3’,5’-cyclic adenosine monophosphate (cAMP), and the most successful methods of improving IVM utilize cAMP modulators to maintain high intra-oocyte cAMP, delaying the onset of maturation. This thesis includes experiments comparing standard bovine IVM to a novel extended IVM method similar to the procedure described by Albuz and colleagues (Albuz …
Detection And Quantification Of Xanthomonas Albilineans In Sugarcane Tissues With Quantitative Polymerase Chain Reaction And Evaluation As Methodology For Monitoring Resistance, Andres Felipe Gutierrez Viveros
Detection And Quantification Of Xanthomonas Albilineans In Sugarcane Tissues With Quantitative Polymerase Chain Reaction And Evaluation As Methodology For Monitoring Resistance, Andres Felipe Gutierrez Viveros
LSU Master's Theses
Leaf scald, caused by Xanthomonas albilineans, is a major sugarcane disease worldwide that is controlled primarily with host plant resistance. Since visual evaluation of disease resistance can be uncertain due to erratic symptom expression, a more reliable screening method is needed for resistance research. A quantitative polymerase chain reaction (qPCR) assay was developed previously with demonstrated potential for resistance screening. However, only four cultivars with extreme reaction against the disease (two highly susceptible and two highly resistant) were compared. Therefore, additional research was conducted to demonstrate assay specificity, compare bacterial populations in 31 clones with varying levels of susceptibility at …
Changes In Bone Density Following Exercise Training In Older Adults, Matthew Casey Scott
Changes In Bone Density Following Exercise Training In Older Adults, Matthew Casey Scott
LSU Master's Theses
Abstract Purpose: To determine effects of 8 wks of progressive whole-body training preceded by 4 wks of regional specific (RSTS) or aerobic training (AT), on bone mineral density (BMD). Methods: Subjects were over age 70 y, with a 6-min walk score of 218-490 m. Subjects were randomized to AT or RSTS for the first 4 wks (Phase 1). AT consisted of ~45 min of walking/biking (50-85% HR reserve), 3 d/wk. RSTS consisted of 8 exercises specific to major muscle groups and was performed for 3-5 min, at ~40-70% of max voluntary strength for ~45 min, 3 d/wk. After 4 wks, …
Factors Influencing Adoption Of Vsh Queens In The Honey Breeding Industry, Julie Leiby
Factors Influencing Adoption Of Vsh Queens In The Honey Breeding Industry, Julie Leiby
LSU Master's Theses
There are many threats that contribute to the decline in honey bee colonies around the United States; among them is the Varroa mite, Varroa destructor. The Varroa mite is a significant threat to honey bees and, by extension, beekeepers across the United States. It is suspected to be one of the main contributors to the increase in colony collapse and the decline in bee numbers and the beekeeping industry (Danka, May 2013). Fifty-five percent of beekeepers exited beekeeping between 1987 and 2002 (USDA). Although honey production continued to decrease through 2007, the number of beekeepers entering beekeeping had increased (USDA). …
The Effect Of Cooking Methods On The Quality Of Refrigerated And Frozen Whole Crawfish Procambarus Clarkii Girard And Procambarus Zonangulus, John Bradley Shackelford
The Effect Of Cooking Methods On The Quality Of Refrigerated And Frozen Whole Crawfish Procambarus Clarkii Girard And Procambarus Zonangulus, John Bradley Shackelford
LSU Master's Theses
Louisiana is famous for its diverse food, culture, and festivals. Crawfish are synonymous with Louisiana cuisine. Approximately 90% of the crawfish harvested in the United States are harvested in Louisiana, but their availability is seasonal (NOAA 2014). Both in-state and out-of-state demand for whole cooked crawfish and for their availability outside the normal harvest season has increased. There is interest from crawfish processors on whether or not steaming of crawfish results in a higher yield than boiling, as traditionally done. This study measures yield, quality parameters, and shelf life of whole boiled and steamed crawfish held in either refrigerated or …
Characterization Of A Σ54-Dependent Response Regulator, Tepr, In The Rice-Pathogenic Bacterium Burkholderia Glumae And Development Of Biocontrol Strategies For Bacterial Panicle Blight Of Rice, Surendra Osti
LSU Master's Theses
Bacterial panicle blight, caused by Burkholderia glumae, is a major bacterial disease of rice in Louisiana. This bacterium contains several virulence factors required for disease development such as toxoflavin, lipase and flagella. In a genome-wide search for regulatory factors related to the virulence of B. glumae, tepR was identified as a negative regulator for toxoflavin production and found to encode a sigma 54-dependent response regulator. TepR is homologous to LuxO, a quorum-sensing signaling component of Vibrio spp. A markerless tepR deletion mutant of B. glumae 336gr-1, LSUPB401, produced more toxoflavin and showed higher lipase and protease activities compared to the …
Effect Of Tissue Source On Adult Equine Multipotent Stromal Cell Pluripotency Induction Treatment With Synthetic Mrna, Javier Martin Jarazo
Effect Of Tissue Source On Adult Equine Multipotent Stromal Cell Pluripotency Induction Treatment With Synthetic Mrna, Javier Martin Jarazo
LSU Master's Theses
Autogenous and autologous adult multipotent stromal cells are applied to treat equine musculoskeletal injuries in clinical practice. However, options for autologous therapy in the equine specie are restricted due to the limited biological material obtained or MSCs tissue harvest procedure and because of their unpredictable in vivo behavior. Induced pluripotent stem cells represent an alternative to overcome these limitations. Traditionally, iPSCs are produced by introducing DNA for early embryonic genes into cells with viruses. The method tested in this study, avoids the use of viral vectors and potential for exogenous DNA integration into the cell’s genome by utilizing a lipid …
Analysis Of The Mineral Composition Of Louisiana Wild Caught Shrimp By Icp-Oes And Classification Of Geographical Origin, Samantha Nichole Stein
Analysis Of The Mineral Composition Of Louisiana Wild Caught Shrimp By Icp-Oes And Classification Of Geographical Origin, Samantha Nichole Stein
LSU Master's Theses
Nationwide, seafood consumers are paying close attention to their seafood options and demanding transparency on point of origin. Recent studies have shown that shrimp can reflect the mineral content of the waters from which they are harvested. Mineral analysis was conducted using inductively coupled plasma optical emission spectrometry on the tail muscle from each coastal group and imported farmed raised samples. Analysis of variance was used to detect differences among catch locations and seasons along the Louisiana coast, as well as differences in the mineral profile of farm raised imported shrimp. Multivariate analysis of variance and descriptive analysis was used …
Species Abundance And Influence Of Nematodes In Urban Turfgrass Ecosystems In East Baton Rouge Parish, Louisiana, Addison Ray Plaisance
Species Abundance And Influence Of Nematodes In Urban Turfgrass Ecosystems In East Baton Rouge Parish, Louisiana, Addison Ray Plaisance
LSU Master's Theses
In 2011 and 2012, 100 residential lawns in the Baton Rouge, LA area were sampled to document the incidence of plant-parasitic nematodes, in addition four full-season microplot experiments and four 71-day duration greenhouse experiments were conducted to evaluate their pathogenicity on St. Augustine and centipede turfgrasses. Nematode genera associated with both turfgrasses included Criconemella, Helicotylenchus, Meloidogyne, Pratylenchus, Tylenchorynchus and Tylenchus spp. In microplot trials in 2012, nematodes did not cause significant damage to either turfgrass, but soil exhibited an effect on plant growth parameters. In 2013, when there was significant nematode related injury to both turfgrasses, there were no significant …
The Role Of Futures Prices In Pricing Commodity Exports Of Developing Countries, Jorge Jose Handal Reyes
The Role Of Futures Prices In Pricing Commodity Exports Of Developing Countries, Jorge Jose Handal Reyes
LSU Master's Theses
The purpose of this thesis is to study the empirical linkages between nearby futures prices for coffee at the New York (NY) Intercontinental Exchange (ICE)/NY Board of Trade (NYBOT) and cash prices (producer and export prices) in selected Latin American countries. This theme was entertained in Fortenbery and Zapata (2004) and subsequently by Fortenbery and Zapata (2004) and Li and Fortenbery (2013). This thesis uses data from January 1990 to May 2013 and adds producer cash prices in addition to export prices, thus expanding the dataset by over a decade and adding local market cash prices relative to the first …
Methionine Restriction-Induced Metabolic Changes In C57bl6j Mice, Cory Christopher Cortez
Methionine Restriction-Induced Metabolic Changes In C57bl6j Mice, Cory Christopher Cortez
LSU Master's Theses
Introduction: Eighty percent restriction of normal dietary methionine (MR) intake has been shown to increase energy expenditure and attenuate the rate of adiposity gain in rodents, despite a paradoxical increase in energy intake. Energy expenditure in rats was shown to increase, even though physical activity level stays the same. This observation suggests that metabolic mechanisms account for the majority of increased energy expenditure measured in methionine restricted animals. Purpose: To observe and document the onset of physiological effects brought about and to determine the mechanistic role of the skeletal muscle on MR-induced metabolic changes in the C57BL6J mouse. Methods: C57BL6J …
Detection And Confirmation Of Veterinary Drug Residues In Commercially Available Frozen Shrimp, Jessica Danielle Johnson
Detection And Confirmation Of Veterinary Drug Residues In Commercially Available Frozen Shrimp, Jessica Danielle Johnson
LSU Master's Theses
Aquaculture has grown rapidly as the world’s wild-caught fisheries approach their sustainable limits. Feed conversion in aquaculture is more efficient than in terrestrial animals. Thus with a growing world population, seafood produced through aquaculture can provide a high quality source of protein. Aquaculture systems rely on high stocking densities and commercial feeds to increase production and profitability, which increase animal stress and susceptibility to disease. Veterinary drugs are commonly used to prevent and treat disease outbreaks. Several of these drugs are banned for use in shrimp farming in the United States. These drugs can be toxic to humans, with side …
Is The Foliar Yellow Vein Of Some Ornamental Plants Caused By Plant Viruses?, Favio Eduardo Herrera
Is The Foliar Yellow Vein Of Some Ornamental Plants Caused By Plant Viruses?, Favio Eduardo Herrera
LSU Master's Theses
Plant viruses have shown to be the cause of the yellow vein symptoms on the foliage of several ornamental plants. In this study five ornamental plants: oxalis (Oxalis debilis var. corymbosa) cv. Golden Veined Oxalis, geranium (Pelargonium peltatum) cv. Crocodile, pseuderanthemum (Pseuderanthemum carruthersii) cv. Golden Net Bush (narrow leaf and broad leaf variants), honeysuckle (Lonicera japonica) cv. Yellow Net Honeysuckle and coleus (Solenostemon scutellarioides) cv. Electric Lime, showing foliar yellow vein were used. Graft transmissions indicated that, except for coleus, the foliar yellow vein of all other plants was caused by infectious agents, likely plant viruses. With the exception 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 …
Screening For Resistance To Sugarcane Brown Rust With Controlled Conditions Inoculation, Mavir Carolina Avellaneda Barbosa
Screening For Resistance To Sugarcane Brown Rust With Controlled Conditions Inoculation, Mavir Carolina Avellaneda Barbosa
LSU Master's Theses
Brown rust, caused by Puccinia melanocephala, is an important disease of sugarcane. Breeding for host plant resistance is the primary control measure. Screening for resistance has relied on rating the severity of symptoms caused by natural infection; however, erratic results make this method problematic. A method accomplishing both infection and disease expression under controlled conditions could avoid the problems associated with resistance evaluations under natural infection. Inoculation of seedlings was evaluated to determine whether it could provide accurate resistance ratings in cross appraisal, and inoculation under controlled conditions was evaluated for the potential to accurately determine resistance reactions in clones …
A Factor Analysis Of The Dimensions Of Economic Damages From Tropical Storms And Hurricanes In Louisiana, James Luke Boutwell
A Factor Analysis Of The Dimensions Of Economic Damages From Tropical Storms And Hurricanes In Louisiana, James Luke Boutwell
LSU Master's Theses
Coastal communities are highly sensitive to disturbances from tropical storms and hurricanes. This is particularly true in Louisiana and along the U.S. Gulf Coast where economies are largely dependent on tourism and natural resource based industry. Since Hurricane Katrina and, more recently, Hurricane Sandy, there has been an increase in concern for how coastal communities will mitigate and respond to the impacts of coastal storms. These concerns are made more acute by the increasing population concentrated along the coast and the risk of more frequent and more severe coastal storms in the future. A commonly advocated-for method of storm damage …
Relationship Of Total Phenolic Contents, Dpph Activities And Anti-Lipid-Oxidation Capabilities Of Different Bioactive Beverages And Phenolic Antioxidants, Yongchao Zhu
LSU Master's Theses
Polyphenol compounds are widely used as antioxidants in food processing. The conventional phenolic content, scavenging DPPH free radical assays have been widely used for antioxidant evaluation. This research aimed to study the correlation between scavenging DPPH (2, 2-diphenyl-1-picrylhydrazyl) free radical activity, total phenolic content and anti-lipid-oxidation capability of natural and synthetic antioxidants and four beverages drinks. Synthetic phenol antioxidants, BHA (butylated hydroxyanisole), BHT (butylated hydroxytoluene), PG (propyl gallate), TBHQ (tert-butylhydroquinone) and naturally occurring phenolics ƒÑ-T(£\-tocopherol), CA(Chlorogenic acid), GA(Gallic acid), QCT(Quercetin), RSV(Resveratrol), and SA(Syringic acid) were examined for their total phenolic content (TPC) and scavenging DPPH free radical activity. The anti-lipid-oxidation …
Parental Pressure, Anxiety, And Performance Among Age Group Swimmers, Timothy Michael Dasinger
Parental Pressure, Anxiety, And Performance Among Age Group Swimmers, Timothy Michael Dasinger
LSU Master's Theses
Background/Purpose: Parents introduce children to youth sport and can increase a child’s level of enjoyment in the sport. However, parents can also place too much pressure on the child, which can lead to increased pre-competition anxiety and decreased performance (Bois, Lalanne, & Delforge, 2008; Scanlan & Lewthwaite, 1984). The purpose of this study was to examine the relationships among perceived and desired parental pressure, pre-competition state anxiety, subsequent performance, and intention to continue the sport in youth swimmers ages 9-18. Method: A sample of 43 swimmers (17 male, 26 female; M=12.8±2.6 years) on a United States Swimming (USS) sanctioned club …
Three Essays On Migration Decision, Migration Destination Choice, And Food Security: Evidence From Chitwan, Nepal, Madhav Regmi
Three Essays On Migration Decision, Migration Destination Choice, And Food Security: Evidence From Chitwan, Nepal, Madhav Regmi
LSU Master's Theses
This thesis research is based on data obtained from the Nepal Ethno Survey of Family, Migration and Development conducted in 396 farming households in the Eastern part of the Chitwan, Nepal. In a three essay thesis format, I explore the factors affecting migration decision and migration destination choices. I then establish a link between remittance and food security status of the surveyed households. In the first essay, I use a probit model to identify household decisions to send or not to send migrants, and identify factors affecting the decision process. I include individual, household and social network characteristics in the …
Remittance And Migration: Impact On Technology Adoption, Natural Resource Conservation, And Household Welfare, Deborah Ann Williams
Remittance And Migration: Impact On Technology Adoption, Natural Resource Conservation, And Household Welfare, Deborah Ann Williams
LSU Master's Theses
Nepal is the perfect country to study all the facets of migration, sustainable agriculture and their subsequent impact on food systems. Droves of migrants are leaving rural Nepal for higher incomes to cover household daily expenses. The Government of Nepal (GON) encourages migration as a means to reduce poverty, and remittance already amounts to 25.83% of GDP, and it is expected to grow (Nepal Bastra Bank 2014, Thieme and Wyss 2005, Yang 2011). However, it is still unclear whether the mass exodus from rural areas and the growing dependence on remittance, the portion of the migrant workers' earnings sent back …
A Quantitative And Molecular Evaluation Of Calves Sired By Three Different Breeds For Growth, Performance, And Carcass Traits, Malcolm Seth Mizell
A Quantitative And Molecular Evaluation Of Calves Sired By Three Different Breeds For Growth, Performance, And Carcass Traits, Malcolm Seth Mizell
LSU Master's Theses
The first objective of the two studies in the research herein was to evaluate growth, performance and carcass quality and composition traits from a group of spring born calves sired by Charolais, Braunvieh, or Simmental bulls. Growth traits analyzed included birth weight (BW), weaning weight (WW), and hip height (HH). Carcass quality and composition traits analyzed included hot carcass weight (HCW), rib eye area (REA), back fat thickness (BF), marbling score (MS), and yield grade (YG). Analysis revealed Simmental sired calves were significantly heavier (P<.05) at birth when compared to Charolais and Braunvieh sired calves. Braunvieh sired calves were reported to be significantly (P<.05) shorter than Simmental sired calves for hip height. Hot carcass weight analysis revealed that Charolais sired calves were significantly (P<.05) heavier when compared to Braunvieh sired calves. No individual sire breed group displayed any significant differences for weaning weight, rib eye area, back fat thickness, marbling score, or yield grade. The second objective was evaluate potential SNP associations on four candidate genes with growth, performance, and carcass composition traits in a population of crossbred steers sired by Charolais, Braunvieh, and Simmental bulls. Traits analyzed for growth, performance, and carcass traits were previously mentioned. Analysis was performed on 38 steer calves. Single nucleotide polymorphisms within four candidate genes including Thyroglobulin (TG), Adiponectin (ADPOQ), Insulin like growth factor-1 (IGF-1), and Calpastatin (CAST) were chosen for analysis. A total of 14 SNP on TG, ADPOQ, CAST, and IGF-1 genes were significantly associated with birth weight and weaning weight. Analysis revealed 13 SNP on TG, ADPOQ, IGF-1, and CAST genes significantly associated (P<.05) with HCW, BF, MS, and YG. No markers were reported to be significantly associated (P<.05) with HH or REA. A total of 11 markers with 3 markers located on the ADPOQ gene, 1 marker located on the IGF-1 gene, 3 markers located on the TG gene, and 5 markers located on the CAST gene were significantly associated with both growth and carcass traits.
Direct Marketing Of Louisiana Shrimp: A Cost-Earnings Analysis, Jill Christoferson
Direct Marketing Of Louisiana Shrimp: A Cost-Earnings Analysis, Jill Christoferson
LSU Master's Theses
Secondary data on cost and earnings from a 2012 survey of inshore Louisiana shrimpers was used as the foundation this partial budget analysis examining the feasibility of supplementing direct marketing (DM) strategies for Louisianan shrimp harvesters. Refinement of key variables for the analysis was conducted using supplemental surveys in 2014 of DM shrimp harvesters and DM consumers. The DM harvester survey (n= 72) produced information on actual price per pound for DM shrimp, as well as catch grade distribution, product marketing mix, and labor estimates. The DM consumer survey (n=255) yielded information on participants’ preferences for DM shrimp, including actual …
Detection Of Clostridium Difficile In Louisiana Oysters, Harvesting Water And Sewage, Da Liu
Detection Of Clostridium Difficile In Louisiana Oysters, Harvesting Water And Sewage, Da Liu
LSU Master's Theses
ABSTRACT Clostridium difficile infection (CDI) was generally considered as a hospital-associated disease; however, recent studies indicated that foods might also play a role in its epidemical chain. From August-2013 to February-2014, oyster samples and harvesting water samples were collected monthly from 6 commercial oyster harvesting areas along Louisiana Gulf Coast and analyzed for total aerobic bacteria, fecal coliforms, coliphage and pathogenic C. difficile. In this study, C. difficile were isolated from 9 (47.37%) of 19 oyster samples and 3 (37.5%) of 8 harvesting water samples and all isolations were carrying the toxin B-encoding gene (tcdB). Toxin B positive C. difficle …
Antioxidant Activities And Phenolic Acids In Different Raw And Boiled Potatoes And Sweet Potatoes, Ya Gao
Antioxidant Activities And Phenolic Acids In Different Raw And Boiled Potatoes And Sweet Potatoes, Ya Gao
LSU Master's Theses
Antioxidants have attracted great interests from food industries and scientists in recent years, because they have the capacity to reduce the harmful oxidation reaction in human body. Phenolic compounds are the common antioxidants that are widely found in fruits and vegetables. In this study, three varieties of potatoes and four varieties of sweet potatoes were used to examine the profiles and contents of phenolics in the raw and boiled potatoes and sweet potatoes. The Red Garnet Sweet Potato (RGSP) was the richest in phenolic content and selected to study the changes of free phenolics, total phenolic content, and antioxidant activity …
Resistance Of Fall Armyworm, Spodoptera Frugiperda (J.E. Smith) To Bacillus Thuringiensis, Ying Niu
Resistance Of Fall Armyworm, Spodoptera Frugiperda (J.E. Smith) To Bacillus Thuringiensis, Ying Niu
LSU Master's Theses
The fall armyworm, Spodoptera frugiperda (J.E. Smith), is a target pest of Bacillus thuringiensis (Bt) corn in North and South America. In this study, multiple tests were conducted in the laboratory and greenhouse to 1) determine the susceptibility of two field populations of S. frugiperda collected from Florida (FL) and Puerto Rico (PR) to purified Cry1F protein and Bt corn leaf tissue and 2) evaluate larval survival of and plant injury by Cry1F-susceptible, -resistant, and –heterozygous genotypes of S. frugiperda on whole plants of transgenic corn containing single and pyramided Bt genes. Corn hybrids evaluated in this study included five …
Development Of A Loop-Mediated Isothermal Amplification For The Detection Of Burkholderia Glumae, Maria Alejandra Caldera
Development Of A Loop-Mediated Isothermal Amplification For The Detection Of Burkholderia Glumae, Maria Alejandra Caldera
LSU Master's Theses
Bacterial panicle blight is among the three most limiting diseases of rice production in the United States. Yield loss up to 40% has been reported from rice fields severely infested with bacterial panicle blight. The disease is caused by Burkholderia glumae and B. gladioli. Although, both species produce similar symptoms and are closely related, but B. glumae strains are more aggressive and cause more severe symptoms on rice. Bacterial panicle bight is difficult to manage in the absence of effective chemical control measures. Rapid and early disease detection is needed to avoid severe yield losses. Several techniques have been developed …
Characterization Of Cry1f Resistance In Fall Armyworm, Spodoptera Frugiperda (J.E. Smith) Obtained From Puerto Rico And Florida, Vikash Dangal
Characterization Of Cry1f Resistance In Fall Armyworm, Spodoptera Frugiperda (J.E. Smith) Obtained From Puerto Rico And Florida, Vikash Dangal
LSU Master's Theses
The fall armyworm (Spodoptera frugiperda (J. E. Smith)) is a major pest targeted by transgenic corn expressing Bacillus thuringiensis (Bt) proteins in both North and South America. The objective of this study was to characterize the inheritance and fitness costs of the Cry1F resistance in two fall armyworm populations collected from Puerto Rico (RR-PR) and Florida (RR-FL). To determine the inheritance of the resistance, besides RR-PR, RR-FL, and a Cry1F-susceptible population (Bt-SS), 14 other populations were developed by reciprocal crosses, F1 by F1 crosses, backcrosses, and crosses between RR-PR and RR-FL. Diet-incorporated bioassays were conducted to determine the Cry1F susceptibility …