Agriculture Commons^™

An Improved Understanding Of Diplodia Ear Rot In Kentucky Corn, Nolan Ryan Anderson

Theses and Dissertations--Plant Pathology

Stenocarpella maydis and Stenocarpella macrospora are both causal agents of Diplodia ear rot (DER) of corn in the U.S. The current prevalence and distribution of each is unknown worldwide. Signs and symptoms of DER include white mold on and between kernels, bleached husks, and pycnidia visible in the cob pith. The term hidden Diplodia describes when no mycelia or bleached husk is present, but pycnidia are still visible inside the cob. This phenomenon is reported to be caused by late infections of Stenocarpella spp. New fungicide nozzle technology has been promoted to increase spray coverage in the lower canopy, which …

Use Of Heterothallic Mat Deletion Strains Of Fusarium Graminearum As Test Mates In Crosses To Evaluate The Genetics Of Pathogenicity And Fitness, Gabdiel Emmanuel Yulfo-Soto

Theses and Dissertations--Plant Pathology

Fusarium Head Blight (FHB), caused by Fusarium graminearum sensu stricto and other members of the F. graminearum species complex (FGSC), is a plant disease that occurs on cereal crops worldwide. FHB causes yield losses not only by reducing grain weight, but also by contaminating the kernels with dangerous trichothecene mycotoxins, especially deoxynivalenol (DON). There is a high degree of genotypic and phenotypic variation among pathogen species and strains, but current FHB risk assessment models and treatments do not account for pathogen diversity. Therefore, it is difficult to predict what will happen if a new, potentially more aggressive variant is introduced, …

Preventative Weed Management Strategies In Arkansas Tomato Production, Gracie E. Morrison, Matthew Bertucci

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Cost-effective weed suppression is an important consideration for tomato growers. Growers often choose methods which minimize hand labor, as hand weeding can be prohibitively expensive. This project determined economic viability of high tunnel tomatoes treated with several methods of weed control, both organic and chemical. These methods included: 2-week hand weeding, 1-week hand weeding, preemergent herbicide application (plots sprayed with herbicide prior to weed emergence), straw mulch (plots bedded with straw), landscape fabric (plots covered in fabric), and untreated weedy control plots. These six treatments were applied to randomized blocks in a high tunnel. Weeding, planting, and harvesting were all …

Management Of The Brown Marmorated Stink Bug (Halyomorpha Halys) (Hemiptera:Pentatomidae) On Small Acreage And Organic Vegetable Systems, Lauren Fann

Theses and Dissertations--Entomology

Invasive species can be very disruptive to established integrated pest management programs. They can cause increases in broad-spectrum insecticide applications with variable effectiveness to mitigate damage. However, not all introduced species develop invasive characteristics; often, many introduced species go undetected. It is not until a species begins to cause economic damage to commodities essential to humans that it becomes classified as an invasive pest. Many challenges arise with the management of invasive pests due to lack of understanding of their biology, behavior, and absence of natural enemies in their introduced range. This often results in poor management and population outbreaks …

Rural Business Development Corporation Annual Report 2022, Department Of Primary Industries And Regional Development, Western Australia

All other publications

In accordance with section 63 of the Financial Management Act 2006, we hereby submit for your information and presentation to Parliament, the annual report of the Rural Business Development Corporation for the reporting period ended 30 June 2023.

The annual report has been prepared in accordance with the provisions of the Financial Management Act 2006 and the Rural Business Development Corporation Act 2000.

Optimising The Carcass Merit Of Irish Beef Cattle Using Genetic And Non-Genetic Information At The Animal And Herd Level, David Kenny

Theses

Failure of beef carcasses to achieve desirable carcass specifications represent inefficiencies within the supply chain, namely greater carcass processing costs and the inability of the resulting primal cuts to conform to high-value market specifications. Analysis of a representative sample of prime Irish beef cattle conducted in this thesis determined that 59% of cattle fail to achieve the desired carcass specifications of the supply chain at slaughter. The objective of this thesis was to use readily available information to define strategies that could help to reduce this statistic. Firstly, the likelihood of Irish beef carcasses achieving the desired carcass specifications was …

Where's The Beef? Meat Shortages, Farmer Needs, And Long-Term Recovery Policies In A Pandemic Era, Kim Vu-Dinh

Faculty Scholarship

COVID-19 not only affected every hospital bed in the nation--if not the world; it also affected nearly every dinner table in America and beyond. Supply chain disruptions caused by the pandemic highlighted deep-seated problems with how we get our meat, and how difficult we make it for American farmers to sell to the family next door. Within a few months of the first reported case in the US, hundreds of workers from just two meat-processing plants on American shores became infected with COVID-19, and imports from around the world came to a standstill as factories and shipping companies were forced …

Agroecology Curriculum Proposal, Emily Kuhn

Pitzer Senior Theses

The purpose of this research is to establish the viability of an Agroecology major at Pitzer College. I begin by problematizing Industrial Agriculture and making a case for Pitzer College to become a higher education leader in the global paradigm shift towards socially and ecologically just food systems. The proposed curriculum compiles pre-existing classes, objectives expanded from the EA field group, and an internship component embedded at five local land-based learning partner sites. I conducted a SWOT (strengths, weaknesses, opportunities, and threats) analysis of the Environmental Analysis field group as a potential host for the agroecology track, including study abroad …

Effects Of Some Commercial Products On Root And Crown Rot Caused By Phytophthora Cactorum In Apple Cultivation, Suat Kaymak

Turkish Journal of Agriculture and Forestry

Root and crown rot caused by Phytophthora cactorum (Lebert & John) Schroeter is one of the most common diseases of apple (Malus domestica) in the world. Due to the negative influences of fungicides on the environment, using other applicable control measures is a plausible way for the management of the disease. The objective of the study was to evaluate the effects of eleven commercial products (bio-pesticides, fertilizers, and activators) on P. cactorum by comparing plant growth parameters (trunk diameter, plant height, number of branches, and root dry weight). Trials were conducted according to a randomized complete block design with three …

Characterization Of Volatile Compounds Nongrafted And Pumpkin-Grafted Bitter Gourd(Momordica Charantia L.), Arzu Karataş, Yusuf Şavşatli

Turkish Journal of Agriculture and Forestry

Bitter melon (Momordica charantia L.) is a unique vegetable-fruit possessing several multifarious health benefits. In this study, the plant extraction obtained from grafted bitter gourd onto pumpkin (Cucurbita maxima) and nongrafted bitter gourd cultivated under greenhouse conditions were evaluated for their constituents of volatile compounds. Gas chromatography-mass spectrometry (SPMEGC-MS) techniques were employed to determine these compounds in the leaves (young, middle, and old-age) and fruits (unripe and ripe) of bitter gourd. The volatile compounds in the leaves of pumpkin during the three stages mentioned above were also investigated. Overall, 72 in leaves and 56 in fruits of bitter gourd compounds …

Morphological Characterisation And Volatile Analysis Of Turkish Garlic Genotypes, Selen Akan

Turkish Journal of Agriculture and Forestry

Garlic is one of the most important vegetables and used for nutrient and medicinal purposes since ancient times. Deficiency in the detection of high-quality garlic genotypes with a rich biochemical profile is one of the main constraints in limiting the production. Currently, the selection and identification of promising garlic genotypes is a popular target, and to reach the best results it is necessary to clarify discrimination. This study aims to discriminate the garlic genotypes obtained from different cultivation locations in Turkey. For that purpose, firstly, morphological characters including biometric parameters were measured based on 18 morphological traits. Particular correlations related …

Assessment Of Safflower Genotypes For Individual And Combined Effects Of Drought And Salinity Stress At Early Seedling Growth Stages, Fatma Kayaçeti̇n

Turkish Journal of Agriculture and Forestry

Safflower is a highly valued oilseed crop. Safflower oil is a source of monounsaturated and polyunsaturated fatty acids which are important for a plurality of industries including the edible vegetable oil industry. Safflower is highly resistant to salinity and drought stress, which impede seed germination. Two safflower cultivars and 4 lines were screened against nine levels of osmotic stress treatments (using NaCl0 and PEG 60000 (control), NaCl-0.2, NaCl-0.4, PEG 6000-0.2, PEG 6000-0.4, PEG 6000-0.2+NaCl-0.2, PEG 6000-0.2+NaCl-0.4, PEG 6000-0.4+NaCl-0.2, PEG 6000-0.4+NaCl-0.4 MPa) for 8 days at seed germination stage. The osmotic stress was observed to induce a negative effect on the …

Integrated Application Of Plant Growth Promoting Rhizobacteria And Biochar Improves Salt Tolerance In Eggplant Seedlings, Razi̇ye Kul

Turkish Journal of Agriculture and Forestry

A pot study was conducted to determine the effects of the combination of plant growth promoting rhizobacteria (PGPR) and biochar on the growth, physiological, and biochemical characteristics of eggplant seedlings under salinity stress. The greenhouse experiment included two salinity levels of NaCl [S0 (0 mM NaCl) and S1 (100 mM NaCl)], three biochar levels [B0 (non-biochar), B1 (5%) and B2 (10%)] and two PGPR [R0 (non-PGPR), R1 (combination of Bacillus megaterium TV-6D, Paenibacillus polymyxa KIN- 37, and Pantoea agglomerans RK92). Results showed that plant growth, relative leaf water content (LRWC), and chlorophyll content of eggplant seedlings decreased significantly, while malondialdehyde …

Curriculum Development Of Agricultural Educators In South Dakota, Mercedes Lemke

Electronic Theses and Dissertations

Curriculum development is an essential component of teaching. Understanding how agriculture education teachers utilize, develop, and adapt content to curriculum can benefit teachers to spend less time on curriculum development. Recognizing the way agriculture education teachers use content in curriculum implementation will allow curriculum developers to create materials that can effectively be used by teachers. This study also looked at the affects of how COVID19 pandemic affected the way teachers locate and develop curriculum. The purpose of this study was to evaluate the way agriculture education instructor’s usage of content for curriculum development, implementation decisions and the affects of the …

Effect Of Essential Oils In The Control Of Fungal Diseases In Small Grains, Esneider Mahecha Bojaca

Electronic Theses and Dissertations

Spring wheat (Triticum aestivum L.) and oats (Avena sativa L.) are important crops due to their high consumption in our daily diet worldwide. They are the main food of consumption per capita due to the high amino-acid content as well of vitamins. However, grain production is limited due to the negative impact of the diseases that cause significant yield loss. Diseases in oats, such as crown rust caused by Puccinia coronata f. sp. avenae (Pca), and in wheat such as Fusarium head blight (FHB) caused by the fungus Fusarium graminearum. Foliar diseases such as tan spot incited by the fungi …

Louisiana Agriculture Winter, 2022, Lsu Agcenter

Louisiana Agriculture

Louisiana’s agricultural and natural resources continue to be under attack from a wide variety of invasive species. Some are new to the state, while others have been here for a long time. This issue of Louisiana Agriculture highlights the broad range of research activities being conducted by LSU AgCenter scientists to understand how invasive species survive and thrive and to identify effective means of controlling or limiting their damage in the state.

Regenerative Agriculture Effects On Invertebrate And Bird Communities And Insect-Provided Ecosystem Services, Alex Michels

Electronic Theses and Dissertations

Conventional agricultural practices can have unintended consequences on the environment and wildlife. Insects and birds are declining at rapid rates around the world, and the current conventional agricultural paradigm is a major driver through habitat loss and the intensification of production. Invertebrates in agroecosystems provide services to both farmers and the rest of society. Regenerative systems may promote the functioning of an agroecosystem by influencing invertebrate abundance, diversity, and ecosystem services and mitigate bird and insect declines through conservation practices that increase soil health, reduce disturbances, and increase biological diversity. Here I address knowledge gaps of the effects of regenerative …

Using Deep Neural Networks To Analyze Precision Agriculture Data, Stephanie Liebl

Electronic Theses and Dissertations

As the population of the Earth increases, there is a growing need for food to feed the inhabitants. Precision agriculture offers techniques and tools that can be used to help accommodate the growing population. One specific precision agriculture tool is remote sensing data, which can be used to image fields as an effort to better predict or understand the crops. In this thesis, deep neural networks are used to evaluate various spatial, spectral, and temporal resolutions of three different satellite images to determine which best predicts corn yield. The main metrics we used to evaluate the models were R-squared (R2), …

Effects Of Buried Wood On The Development Of Populus Tremuloides On Various Oil Sands Reclamation Soils, Kaitlyn E. Trepanier, Laura Manchola-Rojas, Bradley D. Pinno

Aspen Bibliography

Buried wood is an important but understudied component of reclamation soils. We examined the impacts of buried wood amounts and species on the growth of the common reclamation tree species trembling aspen (Populus tremuloides). In a greenhouse study, aspen seedlings were planted into four soil types, upland derived fine forest floor-mineral mix (fFFMM), coarse forest floor-mineral mix (cFFMM), and lowland derived peat and peat-mineral mix (PMM), that were mixed with either aspen or pine wood shavings at four concentrations (0%, 10%, 20% and 50% of total volume). Height and diameter growth, chlorophyll concentration, and leaf and stem biomass were measured. …

Fruits Of Our Labor: Exploring The Impacts Of A Nonprofit Seed Bank On Indigenous Communities In The Southwestern United States, Rachel Mary Davis

Graduate Research Theses & Dissertations

This thesis explores the ways that the nonprofit Native Seeds/SEARCH, of Tucson, Arizona interfaces with Indigenous communities and the local seed and food systems in the Southwest United States. The thesis argues that Native seed and food sovereignty have different meanings for different Indigenous people, and that nonprofits working with Indigenous communities need to consider input from them when deciding how to catalogue, regenerate and sustain healthy grow outs for the future, especially in the light of climate change and drought.