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Efficacy Of Antimicrobial Mitigation On Escherichia Coli Cfu And Growth And Development Of Hydroponic Leafy Greens, Nathan J. Eylands Dec 2018

Efficacy Of Antimicrobial Mitigation On Escherichia Coli Cfu And Growth And Development Of Hydroponic Leafy Greens, Nathan J. Eylands

Theses and Dissertations

The Food and Drug Administration (FDA) have set new standards that apply to agriculturalists producing crops eaten fresh and/or raw by consumers. This new produce safety rule, known as the Food Safety Modernization Act (FSMA), has established science-based standards for all areas of production in agriculture with regards to microbial contamination. Escherichia coli (E. coli) O157:H7 is a particular bacterium of concern under FSMA guidelines. Grower compliance is mandatory and therefore vital to the continuation of any farm. Greenhouse hydroponic growers have shown advantages in efficiency when compared to conventional farming methodology. Those, however, with recirculating hydroponic systems ...


Improving And Testing Methods Of Securing Row Cover For Organic Cucurbit Production, Jennifer M. Widmer, H. Mark Hanna, Brian L. Steward, Kurt A. Rosentrater Jan 2018

Improving And Testing Methods Of Securing Row Cover For Organic Cucurbit Production, Jennifer M. Widmer, H. Mark Hanna, Brian L. Steward, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Cucumber beetles feed on leaves of cucurbit crops (i.e. squash and cucumbers) and can transmit bacterial wilt disease, stunt plant growth, and reduce fruit marketability. Several pesticides are available to deter pests, but options are limited for organic growers. As an alternative, row covers can be used to physically block insects contact with the plants. Comparisons between different methods of utilizing row covers to test their effectiveness are limited. Experiments were designed to compare methods of perimeter sealing, material anchoring, and structural support. The success of perimeter sealing was judged by the number of insects found under row covers ...


The Horticultural Potential Of Wastewater-Grown Algae Fertilizers, J Austin Gimondo Jan 2018

The Horticultural Potential Of Wastewater-Grown Algae Fertilizers, J Austin Gimondo

Graduate Theses and Dissertations

This thesis comprises five chapters and details the evaluation of wastewater-grown-algae-based materials as plant fertilizers in container-crop production. Chapter one provides context for the thesis followed by a detailed review of literature relevant to bio-based fertilization and the use of algae to treat wastewater. Chapters two through four are manuscripts intended for submission to HortScience. Chapter two details the production of three container-grown crops with pellets or pastes of wastewater-grown algae as a fertilizer source. Evaluation of extruded algae-and-bioplastic materials as fertilizers for three container-crops and for turfgrass are reported in chapters three and four, respectively. The final chapter synthesizes ...


The Growing Together Project: Understanding Impacts On Field Day Attendees And Iowa Master Gardeners, Laura Irish Jan 2018

The Growing Together Project: Understanding Impacts On Field Day Attendees And Iowa Master Gardeners, Laura Irish

Graduate Theses and Dissertations

Citizen science has been shown to be an effective tool for increasing data collection, as well as a great benefit to those who participate in the research project. The rising costs and limited funding for conducting large-scale research projects make citizen science projects valuable assets for researchers. Understanding the impact of citizen science projects on the volunteers must be done to better engage with and retain the volunteers. The Growing Together project, a partnership between the ISU Extension and Outreach Master Gardener program and the Human Sciences Extension, was created to increase food security in Iowa. The two major components ...


Evaluating Row Cover Establishment Systems For Cantaloupe And Summer Squash, H. Mark Hanna, Brian L. Steward, Kurt A. Rosentrater Jan 2018

Evaluating Row Cover Establishment Systems For Cantaloupe And Summer Squash, H. Mark Hanna, Brian L. Steward, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Publications

Use of row covers offer an alternative to pesticide application for management of insect feeding and disease transmission and can be beneficial for extending the growing season. Unfortunately, labor required to establish cover is significant (particularly for single rows) and larger pieces of multi-row cover are subject to fatigue from wind and sun. Development of a mechanized single-row cover system or a durable multi-row cover system advances potential for use of covers. Field tests of a commercial semi-mechanized cover implement were conducted. Successful wire insertion ranged from 74 to 100% and depended on careful adjustment of the implement. Success was ...


Horticulture For Pollinator Conservation, Carter M. Westerhold Dec 2017

Horticulture For Pollinator Conservation, Carter M. Westerhold

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Pollinators worldwide are declining. Consequently, the agricultural and ecological services these insects provide are in danger of being lost. Land use intensification, via urbanization, has greatly influenced this decline in pollinators. Luckily, through targeted horticultural practices, stable populations of pollinators can be sustained within urban areas. The horticultural practices of planting diverse floral resources and managing pollinator habitat in urban areas can sustain these populations. Two studies were conducted with the intent to identify horticultural knowledge gaps that could be reduced to aid in pollinator conservation efforts. First, a study to compare Nebraska native and non-native ornamental plants was conducted ...


Better Health Through Horticulture: Using Horticulture To Influence Behavior And Reduce Stress, Rachel Ochylski Nov 2017

Better Health Through Horticulture: Using Horticulture To Influence Behavior And Reduce Stress, Rachel Ochylski

All NMU Master's Theses

Horticultural intervention in the form of gardening workshops connect participants to nature while they nurture another living organism. Horticultural intervention provides opportunities to socialize and engage in a meaningful activity, which have been recognized as helpful in the treatment of common mental health difficulties such as depression and anxiety. There is a lack of experimental studies based on quantitative data that focus on the effects of horticulture on holistic human health. The author evaluated the effects of a horticultural intervention on two separate groups, older adults and college students. The behavioral effects of engaging in gardening activities were evaluated using ...


Optimization Of Overhead Irrigation In Relation To Irrigation Water Use Efficiency In The Louisiana Nursery Industry, Mark A. Wilson Oct 2017

Optimization Of Overhead Irrigation In Relation To Irrigation Water Use Efficiency In The Louisiana Nursery Industry, Mark A. Wilson

LSU Master's Theses

Irrigation efficiency is an essential component of nursery production in the United States. To increase productivity of Louisiana growers, a series of studies were conducted to evaluate current nursery water practices. The objectives were to determine current irrigation practices; evaluate actual water usage; and compare nursery media for water utilization. A mailed survey determined that the majority of growers used can yard production (63%), overhead irrigation (79%), had no irrigation manager (82%) and did not collect/reuse water(61%); 50% do not test/calibrate their irrigation system. Based on this information, five nurseries using overhead irrigation were selected to determine ...


Reducing Pesticide Use Through Environmental Monitoring For Pest Protection, Mark L. Gleason, Paul A. Domoto, Donald R. Lewis, Michael D. Duffy Aug 2017

Reducing Pesticide Use Through Environmental Monitoring For Pest Protection, Mark L. Gleason, Paul A. Domoto, Donald R. Lewis, Michael D. Duffy

Donald Lewis

Strict grading standards require that fresh market apples be blemish-free. Consequently, Iowa orchardists are heavy users of synthetic chemical pesticides, typically making more than a dozen pesticide applications each growing season. The environmental and economic costs of this practice are high. Environmental contamination from spray drift and residues in surface and groundwater is an ever-present concern. This concern is critical in orchards located near populated areas. In addition, these pesticide applications represent direct costs to Iowa growers in the form of pesticide, labor, fuel, and equipment.


Transferring Biological Control Technology To Iowa Strawberry Growers, Donald R. Lewis, John J. Obrycki, Mark L. Gleason, Gail R. Nonnecke Aug 2017

Transferring Biological Control Technology To Iowa Strawberry Growers, Donald R. Lewis, John J. Obrycki, Mark L. Gleason, Gail R. Nonnecke

Donald Lewis

Growers receive nearly $3.5 million gross income from strawberry production in Iowa. Substitution of environmentally friendly, natural products and biological controls for the current chemical-intensive growing approaches will be critical to the expansion of strawberry production in Iowa.


Biologically Intensive Pest Management: Iowa Apple Growers Take The Next Step Toward Sustainability, Mark L. Gleason, Donald R. Lewis, Cheryll A. Reitmeier, Gail R. Nonnecke, Paul A. Domoto, John J. Obrycki, Paul Lasley Aug 2017

Biologically Intensive Pest Management: Iowa Apple Growers Take The Next Step Toward Sustainability, Mark L. Gleason, Donald R. Lewis, Cheryll A. Reitmeier, Gail R. Nonnecke, Paul A. Domoto, John J. Obrycki, Paul Lasley

Donald Lewis

Iowa growers have made strides in decreasing chemical use in their apple production. However, demands of the marketplace and regulatory agencies mean that growers need to investigate ways to further reduce pesticide use, potentially through biologically intensive pest management.


New Strategies To Enhance Sustainability Of Apple Orchards, Mark Gleason, Donald R. Lewis, Matthew Z. Liebman, Paul A. Domoto, Gaile R. Nonnecke, Michael Duffy, Lester Wilson, Cheryl A. Reitmeier Aug 2017

New Strategies To Enhance Sustainability Of Apple Orchards, Mark Gleason, Donald R. Lewis, Matthew Z. Liebman, Paul A. Domoto, Gaile R. Nonnecke, Michael Duffy, Lester Wilson, Cheryl A. Reitmeier

Donald Lewis

Three years of experiments were conducted to help increase profit margins for apple growers, cope with new regulations on pesticide use, and deal with increased pesticide resistance by major apple pests and diseases.


Evaluating Sustainable, Integrated Management Of Muskmelon Diseases, Weeds, And Insect Pests In Partnership With Iowa Growers, Mark L. Gleason, Sara J. Helland, Matthew Z. Liebman, Donald R. Lewis, Henry G. Tabor, Vincent F. Lawson Aug 2017

Evaluating Sustainable, Integrated Management Of Muskmelon Diseases, Weeds, And Insect Pests In Partnership With Iowa Growers, Mark L. Gleason, Sara J. Helland, Matthew Z. Liebman, Donald R. Lewis, Henry G. Tabor, Vincent F. Lawson

Donald Lewis

Several ways to decrease grower reliance on chemicals in muskmelon production were studied.


Building In Integrated Pest Management Network In Cooperation With Iowa Fruit And Vegetable Growers, Mark L. Gleason, Donald R. Lewis, Forrest W. Nutter Jr., Gail R. Nonnecke, Paul Lasley, Steven C. Padgitt, Eldon R. Everhart, Gary Peterson, Naomi Maahs Aug 2017

Building In Integrated Pest Management Network In Cooperation With Iowa Fruit And Vegetable Growers, Mark L. Gleason, Donald R. Lewis, Forrest W. Nutter Jr., Gail R. Nonnecke, Paul Lasley, Steven C. Padgitt, Eldon R. Everhart, Gary Peterson, Naomi Maahs

Donald Lewis

Fifty-one commercial growers of apples, strawberries, tomatoes, and/or watermelons cooperated with Iowa State University (ISU) Extension specialists in a three-year program to evaluate IPM control techniques. Scouts and growers monitored pest infestations and diseases such as codling moth on apples, tarnished plant bugs on strawberries, and anthracnose on tomatoes and melons. Growers sprayed only when pest populations or disease risk values reached levels capable of doing crop damage. Weather conditions were monitored for periods favorable to pest outbreaks. On average, ISU researchers estimate that growers applied from 25 to 55 percent fewer insecticide and fungicide sprays (depending on the ...


Function And Biodegradation In Soil Of Bioplastic Horticultural Containers Made Of Pla-Biorestm Composites, James Schrader, Kenneth Mccabe, William Graves, David Grewell Jun 2017

Function And Biodegradation In Soil Of Bioplastic Horticultural Containers Made Of Pla-Biorestm Composites, James Schrader, Kenneth Mccabe, William Graves, David Grewell

William R Graves

Container-crops horticultural industries rely almost exclusively on petroleum-based plastic containers for modern production systems. Containers made of these materials fulfill all of the functions required during crop production, and perform better than containers made of clay, peat, and other natural materials, but the source of the plastic materials (fossil carbon), their lack of biodegradability, and their end-of-life disposal (97% end up in landfills) are major obstacles to sustainability. Although function and efficiency are among the most important aspects in determining the best materials for horticultural containers, there is no need for containers to persist in the environment for decades when ...


Genetic Determinism Of Xanthomonas Arboricola Pv. Pruni (Xap) Resistance, Fruit Quality, And Phenological Traits In Peach And Incorporation Of Marker-Assisted Selection (Mas) In The University Of Arkansas Peach And Nectarine Breeding Program, Terrence James Frett May 2016

Genetic Determinism Of Xanthomonas Arboricola Pv. Pruni (Xap) Resistance, Fruit Quality, And Phenological Traits In Peach And Incorporation Of Marker-Assisted Selection (Mas) In The University Of Arkansas Peach And Nectarine Breeding Program, Terrence James Frett

Theses and Dissertations

For over two decades the incorporation of marker-assisted selection (MAS) has been discussed as an innovative approach to increase peach breeding efficiency. Although hundreds of quantitative trait loci (QTLs) have been identified, only a few have been converted into usable MAS tools. This highlights a disconnect between genomic discoveries and practical application in breeding programs, which has delayed use of MAS.

In this dissertation, three sequential steps were performed with the objective to bridge this gap and develop breeding-relevant DNA tests for MAS of fruit bacterial spot resistance (Xap1 and Xap6), fruit quality [blush (Rf), acidity (D), and acidity and ...


Propagating Jujubes, Rachelle Johnstone Jan 2016

Propagating Jujubes, Rachelle Johnstone

Research Reports

Jujubes can be propagated by various methods such as wedge/cleft grafting, whip grafting and bark grafting as well as budding. Local propagators have better success with budding but find that wedge grafting leads to a stronger tree. Most of the latest research into propagation is in micropropagation and tissue culture however this technique is mainly used for research and breeding new cultivars and not in a commercial capacity. Grafting can be more of an art than a science. Much of the success of grafting depends on not only performing a technically correct graft but performing the graft at the ...


Organic No-Till And Strip-Till Systems For Broccoli And Pepper Production, Dana Lipinski Jokela Jan 2016

Organic No-Till And Strip-Till Systems For Broccoli And Pepper Production, Dana Lipinski Jokela

Graduate Theses and Dissertations

Organic farmers rely extensively on tillage to incorporate plant residues, prepare seedbeds, and control weeds. However, tillage may have adverse effects on soil health, and conventional no-till production methods, which rely on herbicide for weed control, are not compatible with organic farming, so research was conducted on organic no-tillage (NT) and strip-tillage (ST), which rely on terminating a cover crop with a roller-crimper. Field research was carried out over two years (2013–14 and 2014–15) to compare two organic, cover crop-based reduced tillage systems (NT and ST) with conventional tillage (CT) in the production of organic bell pepper and ...


15th Annual Iowa Organic Conference Highlights Biodiversity And Its Benefits, Kathleen Delate Oct 2015

15th Annual Iowa Organic Conference Highlights Biodiversity And Its Benefits, Kathleen Delate

Integrated Crop Management News

The 15th Annual Iowa Organic Conference will be held Nov. 22-23 on the University of Iowa campus in Iowa City, as a joint effort between Iowa State University and the University of Iowa Office of Sustainability. Producers and experts from across the country will share tips for transitioning into organic production and methods to enhance organic operations.


Sagers Solar Greenhouse, Larry A. Sagers May 2015

Sagers Solar Greenhouse, Larry A. Sagers

Archived Gardening Publications

No abstract provided.


Historical Common Names Of Great Plains Plants, With Scientific Names Index. Volume I: Common Names, Elaine Nowick Mar 2015

Historical Common Names Of Great Plains Plants, With Scientific Names Index. Volume I: Common Names, Elaine Nowick

Zea E-Books

Containing thousands of entries of both vernacular and scientific names of Great Plains plants, the literature that informs this exhaustive listing spans nearly 300 years. Author Elaine Nowick has drawn from sources as diverse as Linnaeus, Lewis and Clark, and local university extension publications to compile the gamut of practical, and often fanciful, common plant names used over the years. Each common name is accompanied by a definitive scientific name with references and authority information. Interspersed with scientifically-correct botanical line drawings, the entries are written in standard ICBN format, making this a useful volume for scholars as well as lay ...


Historical Common Names Of Great Plains Plants, With Scientific Names Index. Volume Ii: Scientific Names Index, Elaine Nowick Mar 2015

Historical Common Names Of Great Plains Plants, With Scientific Names Index. Volume Ii: Scientific Names Index, Elaine Nowick

Zea E-Books

Containing thousands of entries of both vernacular and scientific names of Great Plains plants, the literature that informs this exhaustive listing spans nearly 300 years. Author Elaine Nowick has drawn from sources as diverse as Linnaeus, Lewis and Clark, and local university extension publications to compile the gamut of practical, and often fanciful, common plant names used over the years. Each common name is accompanied by a definitive scientific name with references and authority information. Interspersed with scientifically-correct botanical line drawings, the entries are written in standard ICBN format, making this a useful volume for scholars as well as lay ...


Horticulturae — An International, Multidisciplinary, Open Access Journal, Douglas D. Archbold Jan 2015

Horticulturae — An International, Multidisciplinary, Open Access Journal, Douglas D. Archbold

Horticulture Faculty Publications

No abstract provided.


Evaluation Of Herbicide Programs For Liberty Link Sweet Corn Hybrids, Vince Lawson Jan 2015

Evaluation Of Herbicide Programs For Liberty Link Sweet Corn Hybrids, Vince Lawson

Iowa State Research Farm Progress Reports

The recent introduction and availability of Liberty Link sweet corn hybrids provides growers with new options for postemergence weed control. The Liberty Link technology utilizes specially developed hybrids that are tolerant to Liberty 280 SL (glufosinate), a foliar applied, broad-spectrum herbicide with no residual control. The objective of this study was to evaluate and identify the best strategies for using Liberty 280 SL in a sweet corn weed management program.


Effect Of Plastic Mulch On Sweet Potato Yield And Quality, Ajay Nair, Jennifer Tillman, Ray Kruse, Dana Jokela Jan 2015

Effect Of Plastic Mulch On Sweet Potato Yield And Quality, Ajay Nair, Jennifer Tillman, Ray Kruse, Dana Jokela

Iowa State Research Farm Progress Reports

Sweet potato, Ipomoea batatas, is a warmseason vegetable predominantly grown in the southern part of the United States. In recent years, its production region has expanded quite rapidly to various Midwestern and Eastern states.


Ntep Greens Height Bentgrass Study 2014, Dan Strey, Nick Christians, Ryan Adams Jan 2015

Ntep Greens Height Bentgrass Study 2014, Dan Strey, Nick Christians, Ryan Adams

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was initiated in September 2014 as part of the NTEP program. This is the first year data were collected. It contains 20 bentgrass cultivars.


Strip-Tillage And Row Cover Use In Organically And Conventionally Grown Summer Squash, Jennifer Tillman, Ajay Nair, Jean Batzer, Mark Gleason Jan 2015

Strip-Tillage And Row Cover Use In Organically And Conventionally Grown Summer Squash, Jennifer Tillman, Ajay Nair, Jean Batzer, Mark Gleason

Iowa State Research Farm Progress Reports

Sustainable production of summer squash involves multiple management practices. Some cover crops can be “rolled” when mature to produce a ground-covering mat. The cash crop is then planted in tilled strips made in the residue. This “strip-tillage” technique provides a weed-controlling, moistureretaining mat that is biodegradable, unlike plastic mulches. The reduction in tillage can improve soil health. Row covers provide a favorable microclimate and act as a physical barrier to pests when placed over young transplants. This can help plants grow more rapidly and reduce diseases spread by insects early in the season, such as yellow vine decline and bacterial ...


Summer Cover Crop Influence On Fall Vegetable Production, Ray Kruse, Ajay Nair Jan 2015

Summer Cover Crop Influence On Fall Vegetable Production, Ray Kruse, Ajay Nair

Iowa State Research Farm Progress Reports

One of the major challenges confronting vegetable growers is to manage weeds in a sustainable way. Herbicides often are the primary tools to manage weeds but growers are interested in utilizing sustainable and environmentally conscious tools for weed management. Cover crops are gaining popularity and recognition as a tool that can manage weeds, build organic matter, suppress erosion, and improve soil quality and health. The goal of this project was to evaluate four cover crops for weed suppression and their effects on yields of fall vegetables. The four cover crops studied were buckwheat (coolseason broadleaf), cowpea (warm-season broadleaf), oats (cool-season ...


Ntep Perennial Ryegrass Study 2014, Nick Christians, Dan Strey, Ryan Adams Jan 2015

Ntep Perennial Ryegrass Study 2014, Nick Christians, Dan Strey, Ryan Adams

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2010 as part of the NTEP program. It contains 88 perennial ryegrass cultivars.


Fifth Year Performance Of Honeycrisp Grafted On 31 Dwarfing Rootstocks Of The Nc-140 2010 Regional Apple Rootstock Trial, Diana Cochran, Paul Domoto, Lynn Schroeder Jan 2015

Fifth Year Performance Of Honeycrisp Grafted On 31 Dwarfing Rootstocks Of The Nc-140 2010 Regional Apple Rootstock Trial, Diana Cochran, Paul Domoto, Lynn Schroeder

Iowa State Research Farm Progress Reports

Dwarfing rootstocks have the potential to increase profitability of tree-fruit growers by providing smaller trees suitable for highdensity plantings. Although the initial installation cost can be 10 to 30 times greater than lower-density plantings, the long-range returns can far exceed the traditional plantings. However, to be viable as a commercial rootstock, dwarfing rootstocks must be adapted to a range of agro-climatic conditions, moderately disease resistant, high yielding, and produce quality fruit.