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2019

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Intersecting Identities And Social Support Impacting Suicidal Ideation And Attempts Among Gender Minority Adults, Ashley R. Pate Dec 2019

Intersecting Identities And Social Support Impacting Suicidal Ideation And Attempts Among Gender Minority Adults, Ashley R. Pate

Theses and Dissertations

Suicidality rates are far higher among gender minority individuals than in the general population. This study sought to determine if intersecting identities and social support play a role in these rates. There were no differences in suicidality among gender minorities with an intersecting sexual minority identity. For intersecting racial/ethnic identities, it was found that White individuals were more likely to report past suicidal ideation than racial/ethnic minority individuals. Family support was independently associated with less suicidal ideation, whereas gender minority friend support was independently associated with an increase in suicidal ideation.

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Italian Ryegrass (Lolium Perenne L. Ssp. Multiflorum) Control In Mississippi Corn (Zea Mays L.) Production, Michael Todd Wesley Jr Dec 2019

Italian Ryegrass (Lolium Perenne L. Ssp. Multiflorum) Control In Mississippi Corn (Zea Mays L.) Production, Michael Todd Wesley Jr

Theses and Dissertations

Studies were conducted in the field and in containers in Mississippi from 2017-2019 to optimize Italian ryegrass control in corn production. Most fall-applied residual herbicides provided ≥ 90% Italian ryegrass control 56 days after treatment (DAT) in both field and container experiments. Oxyflurofen provided 95% Italian ryegrass control 28 DAT but only 81% control 56 DAT in field plots. S-metolachlor plus atrazine followed by paraquat produced the highest return on investment for both site-years. The timing of removal study indicates the optimum time to remove Italian ryegrass relative to corn planting is approximately three to four weeks prior to planting. …

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Family Firm Selection: A Relational Perspective, William Elliot Tabor Dec 2019

Family Firm Selection: A Relational Perspective, William Elliot Tabor

Theses and Dissertations

This study focuses on the hiring of nonfamily employees in family firms. Research to date has emphasized the challenges family firms confront in attracting and selecting quality nonfamily human capital. This literature has emphasized the limitations these firms face due to the information asymmetries common to the hiring process. However, this research has not considered the advantages available to family firms through their social network. Drawing on agency theory, I hypothesize that owner referral utilization mediates the relationship between family essence and firm performance because their use lessens the agency conflicts between owners and nonfamily members. Utilizing a sample of …

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Faunal Assemblages Associated With Living Shorelines And Implications For High-Wave Energy Ecosystems, Daniel Firth Dec 2019

Faunal Assemblages Associated With Living Shorelines And Implications For High-Wave Energy Ecosystems, Daniel Firth

Theses and Dissertations

This study investigated the main and interactive effects of nearshore breakwaters and marsh vegetation on faunal abundance and diversity along an eroded shoreline in Bon Secour Bay, Alabama. In summer 2016, eight replicates of three vegetation treatments plots (naturally vegetated, planted, and open) were established along a breakwater-protected and an adjacent no breakwater shoreline. After which, three methods were used to evaluate nekton quarterly from summer 2016 to summer 2018; Breder traps along the shoreline and lift nets and trawls in nearshore waters. Data were analyzed using the Shannon-Weiner diversity index and ANOVA. Results showed breakwaters supported significantly more abundant …

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Heterogeneous Catalytic Conversion Of Biomass-Derived Carbohydrates To Furanic Biofuel Additives And Chemicals, Islam Elsayed Dec 2019

Heterogeneous Catalytic Conversion Of Biomass-Derived Carbohydrates To Furanic Biofuel Additives And Chemicals, Islam Elsayed

Theses and Dissertations

Increasing energy demand and various problems associated with fossil fuels such as environmental pollution, global warming and diminishing petroleum reserves have greatly stimulated production of fuels and chemicals from renewable sources. Lignocellulosic biomass has been considered as one of the potential sources for a variety of fuels and industrial chemicals. 5-Hydroxymethylfurfural (HMF) has been identified as an excellent platform molecule because it is a flexible intermediate for the synthesis of bio-renewable fuels and materials. HMF can be easily obtained from acid-catalyzed hydration of biomass-derived carbohydrates (hexoses) in various media. HMF can be converted to energy products such as 2,5-bis(alkoxymethyl)furans (BAMFs), …

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High School Teacher’S Acceptance Of Technology And Privacy Concerns In The 1:1 Initiative Laptop Program, Ronald Gatewood Jr Dec 2019

High School Teacher’S Acceptance Of Technology And Privacy Concerns In The 1:1 Initiative Laptop Program, Ronald Gatewood Jr

Theses and Dissertations

Prior research has shown teachers’ attitudes, teachers’ preparation for using technology, and the availability of technology had significant positive associations with technology integration. However, research has shown that teachers do not fully utilize technology, they fail to implement it thoroughly due to a lack of time needed for planning the implementation of technology into the curriculum, and they do not have adequate training which contributes to underutilization of technology. Due to a lack of research from the teachers’ perspective of technology acceptance, the purpose of this study was to examine high school teachers’ acceptance and use of technology and determine …

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How The Dogface Got Its Color: How Genetics And The Environment Influence Color Variation Within And Between Species In The Zerene Butterfly, Jennifer Fenner Dec 2019

How The Dogface Got Its Color: How Genetics And The Environment Influence Color Variation Within And Between Species In The Zerene Butterfly, Jennifer Fenner

Theses and Dissertations

A fundamental question in biology is: How is variation generated? At a basic level, the vast amount of variation and biodiversity is generated through a combination of genetic and environmental processes. Traditionally these processes were treated independently, but recently fields such as evolutionary development have worked to unify our understanding of these mechanisms and to investigate how these processes interact with each other to generate variation. Developmental plasticity provides a fantastic framework for studying how genetic and environmental (GxE) interactions shape and maintain natural variation. Butterflies and their wing color patterns have long been model systems for plasticity. This dissertation …

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Service And Empathy: A Comparison Study Of Intercultural Experiences Among Students At Mississippi College, Victoria Rose Marshall Dec 2019

Service And Empathy: A Comparison Study Of Intercultural Experiences Among Students At Mississippi College, Victoria Rose Marshall

Theses and Dissertations

Service to the community is a key element in mission statements of public and private universities. In the 21st century, higher education shifted by establishing community engagement offices and encouraging student community service through service-learning. Previous literature indicated that experiential learning increased ethnocultural empathy and volunteerism among college students. This study compares two experiential learning programs’ influence on the ethnocultural empathy development among college students at Mississippi College, a private, religious-affiliated university to explore how this empathy increases community service. 38 students were asked to complete the Scale of Ethnocultural Empathy (Wang et al. 2003) and were interviewed about their …

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Spatial Responses Of Adult Male White-Tailed (Odocoileus Virginianus) Deer To Hunting Risk, Ashley Chance Dec 2019

Spatial Responses Of Adult Male White-Tailed (Odocoileus Virginianus) Deer To Hunting Risk, Ashley Chance

Theses and Dissertations

Movement responses of male white-tailed deer (Odocoileus virginianus) to hunting pressure vary across study systems and risk levels and may be confounded by breeding season. At the average levels of risk present on my study area (0.04 hunters/hectare/day) deer almost never altered behavior in response to hunter proximity. Home range characteristics did not predict risk exposure or risk management. Behavioral responses to levels of risk present in my study appear to be minimal, however bucks altered home range size and movements as the breeding season progressed. Most unconstrained movements occurred in early rut, with a 50% reduction during late and …

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Predation Risk Of Double-Crested Cormorants (Phalacrocorax Auritus) On Commercial Catfish Production In The Mississippi Delta, Terrel Christie Dec 2019

Predation Risk Of Double-Crested Cormorants (Phalacrocorax Auritus) On Commercial Catfish Production In The Mississippi Delta, Terrel Christie

Theses and Dissertations

Double-crested Cormorants (Phalacrocorax auritus) impact United States commercial aquaculture and are considered the greatest avian predators on catfish (Ictalurus spp.) aquaculture facilities in the Mississippi Delta. Recent changes in aquaculture practices, regulatory policies, and decreased overall hectares in production prompted this study that: 1) estimated abundance and distribution of cormorants at their night roosts using aerial surveys, 2) assessed cormorant consumption of catfish in relation to their night roost through cormorant collections and stomach contents analysis, and 3) updated a cormorant bioenergetics model with contemporary data to estimate catfish loss. Models estimated that 4.2 and 5 million cormorant forage days …

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Supporting Student Success In Chemistry Using Peer Mentoring, Laboratory Experiments, And Eye-Tracking Analysis, Viveka Lakruwani Perera Dec 2019

Supporting Student Success In Chemistry Using Peer Mentoring, Laboratory Experiments, And Eye-Tracking Analysis, Viveka Lakruwani Perera

Theses and Dissertations

Active participation in the learning process enhance students’ critical thinking and problem-solving skills. We implemented peerocused, active learning, recitation sessions with the large-enrollment sections for General Chemistry I courses at Mississippi State University (MSState) over a period of four semesters beginning in Spring 2016. The peerocused recitation program was a success improving student final (standardized ACS) exam scores, pass/fail rates for the course, and continuation on to General Chemistry II (CH 1223) courses. Peerocused collaborative learning and students possessing ownership over their learning significantly enhanced academic outcomes of our program. Worked-example effect is the best known and apparently the most …

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Rice (Oryza Sativa) Response To Sub-Lethal Concentrations Of Crop Desiccants, Justin M. Mccoy Dec 2019

Rice (Oryza Sativa) Response To Sub-Lethal Concentrations Of Crop Desiccants, Justin M. Mccoy

Theses and Dissertations

Research was conducted at the Mississippi State University Delta Research and Extension Center from 2016 to 2018 to determine the effects of sub-lethal concentrations of paraquat, glyphosate, saflufenacil, and sodium chlorate exposure to rice at late-season growth stages, determine the effects of exposure to sub-lethal concentrations of glyphosate or paraquat on multiple rice cultivars, and characterize the effects of paraquat exposure and Oebalus pugnax feeding on rice grain quality. In the current research, rough rice grain yields were reduced by exposure to sub-lethal concentrations of soybean desiccants 0 to 28 DAH. Rice injury was determined to not be an accurate …

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Problem Solving And Suicide: A First Look, Caitlin E. Titus Dec 2019

Problem Solving And Suicide: A First Look, Caitlin E. Titus

Theses and Dissertations

Suicide is the 10th leading cause of death in the United States, with rates increasing over the past several decades. This study examined whether problem-solving performance differs in those with no suicide ideation or attempts compared to those with only suicide ideation and with those with a history of attempts. Results demonstrated that when accounting for depression, problem-solving accuracy was positively predictive for the suicidal ideation group. Furthermore, the suicidal ideation group solved more problems on average than both those with no history of suicidal thoughts and behaviors and the suicide attempt group. The current study was somewhat underpowered and …

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Perceptions Of Food, Supportive Resistance Resources, And Nutrition Knowledge Of Bariatric Surgery Patients, Savannah K. Walker Dec 2019

Perceptions Of Food, Supportive Resistance Resources, And Nutrition Knowledge Of Bariatric Surgery Patients, Savannah K. Walker

Theses and Dissertations

Adult overweight and obesity is a life-threatening health concern worldwide. Bariatric surgery is a successful treatment for severely obese individuals however, there is a moderate risk for weight regain. This study evaluated perception of food, supportive resistance resources, and nutrition knowledge, which play important roles in successful weight loss post bariatric surgery. Participants completed a three-part questionnaire at three time intervals: prior to surgery, 2 months post-surgery, and 5 months post-surgery. Results show that bariatric patients’ eating behavior significantly changes post bariatric surgery, but a disordered perception of food remains. Bariatric surgery patients believe support from significant others and family …

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Impact Of Refrigerated Storage On The Dissipation Of Woody Broiler Breast Meat, Michael Byron Dec 2019

Impact Of Refrigerated Storage On The Dissipation Of Woody Broiler Breast Meat, Michael Byron

Theses and Dissertations

Chicken breast samples, (n=90; n=30 normal, n=30 moderate woody breast (WB), n=30 severe WB) were collected from a commercial processing plant on 5 separate occasions. After 5 days of storage at 2-4 ºC, 84% of severe WB fillets dissipated to moderate WB, which was greater (P<0.05) than all other storage times. In comparison, 40-52% of the moderate WB fillets dissipated to slight WB or normal breasts after 3 to 5 days of storage. Shear force was greater (P<0.05) for normal breast meat than moderate and severe WB meat on day 0. After 2, 3, 4, and 5 days of storage the upper position (cranial part) of severe WB had greater shear force than normal fillets (P<0.05). Therefore, the dissipation that occurred in woody breast meat over refrigerated storage was apparent through palpation but did not result in improved texture in the cranial portion of the breast, based on shear force results.

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In Ovo Injection Of Probiotic Combinations And Their Impact On Broiler Chick Performance, Immune Response, And Gastrointestinal Development, Chrysta Beck Dec 2019

In Ovo Injection Of Probiotic Combinations And Their Impact On Broiler Chick Performance, Immune Response, And Gastrointestinal Development, Chrysta Beck

Theses and Dissertations

As the international poultry industry searches for antibiotic alternatives, dietary probiotic supplementation has exhibited the ability to decrease FCR, increase live weight gain, and regulate inflammatory responses within the gut of broiler chickens. The in ovo (or in egg) supplementation of probiotics has the potential for promoting early colonization of probiotic bacteria in the gastrointestinal tract and providing enhanced protection against pathogens in the hatchery and grow-out facilities. In the present studies, the in ovo injection of either L. animalis + E. faecium combination or L. animalis + B. licheniformis combination on d 18 of incubation does not negatively affect …

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Inferences On The Power-Law Process With Applications To Repairable Systems, Jularat Chumnaul Dec 2019

Inferences On The Power-Law Process With Applications To Repairable Systems, Jularat Chumnaul

Theses and Dissertations

System testing is very time-consuming and costly, especially for complex high-cost and high-reliability systems. For this reason, the number of failures needed for the developmental phase of system testing should be relatively small in general. To assess the reliability growth of a repairable system, the generalized confidence interval and the modified signed log-likelihood ratio test for the scale parameter of the power-law process are studied concerning incomplete failure data. Specifically, some recorded failure times in the early developmental phase of system testing cannot be observed; this circumstance is essential to establish a warranty period or determine a maintenance phase for …

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Docosahexaenoic Acid Consumption Impedes Early Interferon- And Chemokine-Related Gene Expression While Suppressing Silica-Triggered Flaring Of Murine Lupus, Abby D. Benninghoff, Melissa A. Bates, Preeti S. Chauhan, Kathryn A. Wierenga, Kristen N. Gilley, Andrij Holian, Jack R. Harkema, James J. Pestka Dec 2019

Docosahexaenoic Acid Consumption Impedes Early Interferon- And Chemokine-Related Gene Expression While Suppressing Silica-Triggered Flaring Of Murine Lupus, Abby D. Benninghoff, Melissa A. Bates, Preeti S. Chauhan, Kathryn A. Wierenga, Kristen N. Gilley, Andrij Holian, Jack R. Harkema, James J. Pestka

Animal, Dairy, and Veterinary Science Faculty Publications

Exposure of lupus-prone female NZBWF1 mice to respirable crystalline silica (cSiO2), a known human autoimmune trigger, initiates loss of tolerance, rapid progression of autoimmunity, and early onset of glomerulonephritis. We have previously demonstrated that dietary supplementation with the ω-3 polyunsaturated fatty acid docosahexaenoic acid (DHA) suppresses autoimmune pathogenesis and nephritis in this unique model of lupus flaring. In this report, we utilized tissues from prior studies to test the hypothesis that DHA consumption interferes with upregulation of critical genes associated with cSiO2-triggered murine lupus. A NanoString nCounter platform targeting 770 immune-related genes was used to assess …

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Tensile Strength And Other Material Properties Of The Equine Suspensory Apparatus Of The Distal Phalanx And The Effect Of Specimen Size, Tensile Load Orientation, And Freezing On Determination Of The Material Properties, Benjamin E. Nabors Dec 2019

Tensile Strength And Other Material Properties Of The Equine Suspensory Apparatus Of The Distal Phalanx And The Effect Of Specimen Size, Tensile Load Orientation, And Freezing On Determination Of The Material Properties, Benjamin E. Nabors

Theses and Dissertations

The suspensory apparatus of the distal phalanx (SADP) is an intricate adaptation of dermal and epidermal tissue that has a specialized role in the horse to absorb concussion while suspending the weight of the horse from within the hoof. The integrity of the hoof-bone connection is critical to the health of the horse and it can be affected by numerous disorders that cause it to fail. Accurate data on the ultimate tensile strength and other material properties of the SADP are important in modeling the behavior of the tissue under load and selecting appropriate prevention and treatment strategies for disorders …

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The Binding Modes Of Diminazene Aceturate With C-Myc G-Quadruplexes, Jerrano Bowleg Dec 2019

The Binding Modes Of Diminazene Aceturate With C-Myc G-Quadruplexes, Jerrano Bowleg

Theses and Dissertations

Interactions between DNA and ligands are important in the rational design of drugs and in research into DNA function. In particular, the interaction of DMZ with DNA structures named “G-quadruplexes” was considered. G-quadruplexes are structures present in telomeres and several oncogenes. The main purpose of this project was to provide a computational tool to study DNA ligand interactions using a variety of molecular modeling techniques that include molecular docking, molecular dynamics simulations (MD) and MM/PBSA (Molecular Mechanics/Poisson Boltzmann Surface Area). We investigated the binding modes and binding affinities of DMZ with c-MYC G-quadruplexes (G4s). We found that the conformation and …

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The Impact Of A Freshman Orientation Program On Academic Achievement For Students Enrolled In A Community College, James Gray Dec 2019

The Impact Of A Freshman Orientation Program On Academic Achievement For Students Enrolled In A Community College, James Gray

Theses and Dissertations

The purpose of this quantitative study was to explore the effectiveness of a freshman orientation program on second-semester retention, second-year retention, and cumulative GPA for students enrolled in a community college in the Deep South. The problem addressed in this study is a lack of sufficient academic and social support for college students, limiting their ability to remain in school and with high levels of academic performance (Nora & Crisp, 2007). For this study, the following research questions were analyzed: (1) Are there differences in 1st to 2nd semester retention for program completers with a 17-18 ACT as compared to …

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Residues And Residue Pairs Of Evolutionary Importance Differentially Direct Signaling Bias Of D2 Dopamine Receptors, María E Terrón-Díaz, Sara J Wright, Melina A Agosto, Olivier Lichtarge, Theodore G Wensel Dec 2019

Residues And Residue Pairs Of Evolutionary Importance Differentially Direct Signaling Bias Of D2 Dopamine Receptors, María E Terrón-Díaz, Sara J Wright, Melina A Agosto, Olivier Lichtarge, Theodore G Wensel

Faculty, Staff and Students Publications

The D2 dopamine receptor and the serotonin 5-hydroxytryptamine 2A receptor (5-HT2A) are closely-related G-protein–coupled receptors (GPCRs) from the class A bioamine subfamily. Despite structural similarity, they respond to distinct ligands through distinct downstream pathways, whose dysregulation is linked to depression, bipolar disorder, addiction, and psychosis. They are important drug targets, and it is important to understand how their bias toward G-protein versus β-arrestin signaling pathways is regulated. Previously, evolution-based computational approaches, difference Evolutionary Trace and Evolutionary Trace–Mutual information (ET-Mip), revealed residues and residue pairs that, when switched in the D2 receptor to the corresponding residues from 5-HT2A, altered ligand potency …

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Examining Multiple Cellular Pathways At Once Using Multiplex Hextuple Luciferase Assaying, Alejandro Sarrion-Perdigones, Lyra Chang, Yezabel Gonzalez, Tatiana Gallego-Flores, Damian W Young, Koen J T Venken Dec 2019

Examining Multiple Cellular Pathways At Once Using Multiplex Hextuple Luciferase Assaying, Alejandro Sarrion-Perdigones, Lyra Chang, Yezabel Gonzalez, Tatiana Gallego-Flores, Damian W Young, Koen J T Venken

Faculty, Staff and Students Publications

Sensitive simultaneous assessment of multiple signaling pathways within the same cells requires orthogonal reporters that can assay over large dynamic ranges. Luciferases are such genetically encoded candidates due to their sensitivity, versatility, and cost-effectiveness. We expand luciferase multiplexing in post-lysis endpoint luciferase assays from two to six. Light emissions are distinguished by a combination of distinct substrates and emission spectra deconvolution. All six luciferase reporter units are stitched together into one plasmid facilitating delivery of all reporter units through a process we termed solotransfection, minimizing experimental errors. We engineer a multiplex hextuple luciferase assay to probe pathway fluxes through five …

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Multi-Platform Comparison Of Canopy Reflectance On Corn Whole Plant And Leaf Tissue Nitrogen Status, Zachary Thomas Sumner Dec 2019

Multi-Platform Comparison Of Canopy Reflectance On Corn Whole Plant And Leaf Tissue Nitrogen Status, Zachary Thomas Sumner

Theses and Dissertations

Single-rate blanket application of fertilizer nitrogen (N) can result in an over or under application. Variable rate (VR) applications tailored to actual crop demands can improve N use efficiency in spatially variable soils. The objective of this study was to compare and improve relationships derived between corn canopy reflectance and corn N status acquired with two sensing platforms. Four fertilizer N rates were used, from deficient to excess, to create varying corn N status. Sensing and biophysical sampling was taken throughout the season for analysis and comparison to calculated vegetation indices (VIs). Results show strong relationships between VIs and corn …

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The Impact Of Utilizing Peer Mentoring Interactions, New Laboratory Experiments, And Writing-To-Learn Practices In Undergraduate Chemistry Education, Dulani Samarasekara Dec 2019

The Impact Of Utilizing Peer Mentoring Interactions, New Laboratory Experiments, And Writing-To-Learn Practices In Undergraduate Chemistry Education, Dulani Samarasekara

Theses and Dissertations

High attrition rates in Science, Technology, Engineering, and Mathematics (STEM) fields are major challenges in undergraduate education. Many students enrolled in STEM fields end up switching their majors to non-STEM fields or leave college without earning any academic qualification. Due to these reasons, the United States is facing a critical shortage of future talented STEM personnel in the domestic workforce. Therefore, graduating a sufficient number of talented students in STEM fields has come to national attention. It is important to examine strategies for improving STEM-major retention and undergraduate education in STEM disciplines. The main purpose of this study was to …

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The Morphology, Pigmentation, And Development Of Structural Coloration In Vanessa Cardui (Lepidoptera: Nymphalidae), Emily A. Shelby Dec 2019

The Morphology, Pigmentation, And Development Of Structural Coloration In Vanessa Cardui (Lepidoptera: Nymphalidae), Emily A. Shelby

Theses and Dissertations

Butterfly wing color patterns are produced by the placement of monochromatic scales that have specific colors due to pigmentation, nanostructures, or a combination of both. Structural coloration results from the interference of light from the architecture of the nanostructures. Structural coloration in butterfly scales has been studied optically, but little is known about the mechanisms used to create these scales compared to scales without structural coloration. Light, scanning, and transmission electron microscopy were used to determine underlying morphological, pigmentation, and developmental differences between blue (i.e., structural) and black (i.e., nonstructural) wing scales of Vanessa cardui. Differences in scale size, pigmentation, …

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Understanding The Effects Of Mass Mortality Events On Plant Communities And Consumer Behavior, Carolina Baruzzi Dec 2019

Understanding The Effects Of Mass Mortality Events On Plant Communities And Consumer Behavior, Carolina Baruzzi

Theses and Dissertations

Mass mortality events (MMEs) are die-offs that result in increased carrion biomass and sometimes the impairment of functional roles. Concurrently, several vulture species are declining. Carrion is a basal resource in ecosystems and its recycling by vultures is considered an ecosystem service. However, the consequences of simultaneously increasing carrion loads and declining vulture populations are unknown. I developed a theoretical framework predicting that, with increasing carrion biomass, carrion food web diversity would increase horizontally and vertically, respectively increasing and decreasing carrion recycling efficiency. Using a manipulative experiment, I investigated the role of bottom-up and top-down forces affecting plant communities during …

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Vegetable, Dietary Fiber Consumption And Obesity In Japan And The United States, Megumi Hashida Dec 2019

Vegetable, Dietary Fiber Consumption And Obesity In Japan And The United States, Megumi Hashida

Theses and Dissertations

The US and Japanese populations do not meet recommended DF intakes. This study indicated the relationship between the variety of vegetables available in markets and vegetable consumption in the US and Japan. The number of vegetables available in markets was determined using online resources from five markets in each country. Mean number of vegetable products in the US was 104.4 products (SD: ±36.8) and mean number of vegetable products in the Japanese markets was 120.2 products (SD: ±15.6). There was no significant relationship between the variety of vegetables in markets and vegetable consumption between the US and Japan. This study …

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Reduced Herbicide Antagonism Through Novel Spray Application Techniques, Luke H. Merritt Dec 2019

Reduced Herbicide Antagonism Through Novel Spray Application Techniques, Luke H. Merritt

Theses and Dissertations

Field studies were conducted to test three application methods for applying antagonistic herbicide combinations: 1) tank mix (TMX), 2) mix-in-line (MIL), and 3) separate boom (SPB). Sethoxydim applied with bentazon, glyphosate applied with dicamba or 2,4-D, and clethodim applied with dicamba or 2,4-D had higher efficacy when applied using the SPB method. Antagonism of all the herbicide combinations above was observed when applied using the TMX and MIL methods. In some cases, antagonism was avoided when using the SPB method. Three application methods tested in greenhouse studies were 1) TMX, 2) synthetic auxin applied first (AAF), and 3) synthetic auxin …

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Fraze Mowing For Overseeding Establishment And Removal Of Perennial Ryegrass, Matthew Carpenter Dec 2019

Fraze Mowing For Overseeding Establishment And Removal Of Perennial Ryegrass, Matthew Carpenter

Theses and Dissertations

Fraze mowing offers a new tool used in both overseeding establishment and removal of perennial ryegrass (Lolium perenne L.). Research objectives were to determine the most effective timing of fraze mowing in overseeding establishment and removal, as well as to compare fraze mowing to other establishment and removal methods. Fall overseeding studies suggest that fraze mowing and scalping in mid-October provides the fastest establishment of ryegrass. However, by mid-March all treatments led to visually similar results. When evaluating removal timings, fraze mowing performed in early- and late-May led to faster visual bermudagrass recovery than March and April timings. Early-season application …

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