Dynamics Of Two Pathogens In A Single Tick Population, 2016 Old Dominion University
Dynamics Of Two Pathogens In A Single Tick Population, Alexis White
Biology and Medicine Through Mathematics Conference
No abstract provided.
Hands Of The Future, Inc; Junior Nature Club; Living Schoolyards, 2016 Hands of the Future, Inc
Hands Of The Future, Inc; Junior Nature Club; Living Schoolyards, Zonda K. Bryant
Purdue P-12 Networking Summit & Poster Session
Programs to connect children to nature
Characterization Of Glycine Rich Proteins From The Salivary Glands Of The Lone Star Tick Amblyomma Americanum, 2016 University of Southern Mississippi
Characterization Of Glycine Rich Proteins From The Salivary Glands Of The Lone Star Tick Amblyomma Americanum, Rebekah Lynn Bullard
Ticks are blood sucking arthropods that feed on living hosts for up to three weeks. The ticks secrete a multitude of pharmacologically active proteins into the host during feeding which allow the tick to avoid the host immune response, establish a blood pool, and form a firm attachment. The firm attachment is facilitated by the formation of a cement cone which surrounds the tick mouthparts and intertwine between the host skin layers. In this study, gene expression of 44 A. americanum genes was measured throughout the bloodmeal to reveal the differential expression of these genes. Each of the genes tested ...
Trox Paulseni (Coleoptera: Trogidae), A New Species From Nebraska And Kansas, Usa, 2016 University of Nebraska-Lincoln
Trox Paulseni (Coleoptera: Trogidae), A New Species From Nebraska And Kansas, Usa, Brett C. Ratcliffe
Trox paulseni Ratcliffe, new species (Coleoptera: Trogidae), is described from Nebraska and Kansas, USA. A description, diagnosis to separate it from Trox hamatus Robinson (its closest congener), distribution, and illustrations are provided.
Managing The Risk Of European Corn Borer Resistance To Transgenic Corn: An Assessment Of Refuge Recommendations, 2016 Iowa State University
Managing The Risk Of European Corn Borer Resistance To Transgenic Corn: An Assessment Of Refuge Recommendations, Terrance M. Hurley, Sylvia Secchi, Bruce A. Babcock, Richard L. Hellmich
The use of Genetically Modified Organisms (GMOs) in agriculture has been on the rise since 1995. Scientists have been working to develop a high-dose refuge management plan that can effectively delay European corn borer resistance to pesticidal GMO corn. This paper develops a stochastic agricultural production model to assess and provide insight into the reasons why refuge recommendations remain controversial.
A Targeted Conservation Approach For Improving Environmental Quality: Multiple Benefits And Expanded Opportunities, Lisa A. Schulte, Heidi Asbjornsen, Ryan Atwell, Chad E. Hart, Matthew J. Helmers, Thomas M. Isenhart, Randy Kolka, Matthew Z. Liebman, Jeri Neal, Matthew E. O'Neal, Silvia Secchi, Richard C. Schultz, Janette R. Thompson, Mark D. Tomer, John C. Tyndall
Find out how targeted conservation practices can have the most impact on environmental quality while causing only a small change in overall agricultural production. Environmental benefits are discussed related to clean air and water, productive soils, diverse wildlife and plant habitat, and biological controls for crop protection.
Insuring The Stewardship Of Bt Corn: A Carrot Versus A Stick, 2016 Texas A & M IUniversity
Insuring The Stewardship Of Bt Corn: A Carrot Versus A Stick, Paul D. Mitchell, Terrance M. Hurley, Bruce A. Babcock, Richard L. Hellmich
Subsidies and fines are compared to voluntary and mandatory refuge insurance (insurance for pest damage on Bt corn refuge) as mechanisms for securing grower compliance with EPA refuge mandates. A conceptual model partially ranks mechanisms. Tradeoffs between mechanisms using grower welfare, payments to growers, and monitoring frequency are quantified empirically. Grower welfare is lowest with mandatory insurance because growers pay all costs, and is highest with direct refuge subsidies because public funds or companies subsidize all costs. Assuming typical premium loads and ignoring distribution considerations, we develop monitoring budgets for fines and subsidies, above which voluntary or mandatory insurance is ...
Bt Corn And Insect Resistance: An Economic Assessment Of Refuges, 2016 University of Minnesota - Twin Cities
Bt Corn And Insect Resistance: An Economic Assessment Of Refuges, Terrance M. Hurley, Bruce A. Babcock, Richard L. Hellmich
Genetically engineered crops offer farmers a new option for controlling pests. The high efficacy of these pesticidal crops, combined with the potential for widespread adoption, has raised concerns that pest resistance may prematurely diminish their value. In response to these concerns, the Environmental Protection Agency requires resistance management plans. Current resistance management plans rely on a highdose refuge strategy. This analysis extends the current framework for evaluating high-dose refuge strategies to include a measure of agricultural productivity and conventional pesticide use. The economic tradeoff relative to agricultural productivity, conventional pesticide use, and pest resistance is assessed when Bt corn is ...
Biotechnology And Pest Resistance: An Economic Assessment Of Refuges, 2016 Iowa State University
Biotechnology And Pest Resistance: An Economic Assessment Of Refuges, Terrance M. Hurley, Bruce A. Babcock, Richard L. Hellmich
Biologists now engineer transgenic crop varieties that offer farmers a new tool for effectively managing pests. Concern over pest resistance, however, has prompted the Environmental Protection Agency to require resistance management plans. This paper develops an economic model of pest management with pest resistance to estimate the constant proportion of cropland planted in refuge that maximizes farm income over a fixed planning horizon. Results indicate a clear economic tradeoff between the pest control benefits of a transgenic variety and the resistance management benefits afforded by refuge.
A Brief History Of Corn: Looking Back To Move Forward, 2016 University of Nebraska-Lincoln
A Brief History Of Corn: Looking Back To Move Forward, Jon Derek Pruitt
Doctoral Documents from Doctor of Plant Health Program
Maize was domesticated from teosinte in Mexico some 7,000 to 10,000 years ago and quickly spread through the Americas. It has become one of the most important crops at a local and global level. Two types, Northern Flint corn and Southern Dent corns provided the basis of the genetic background of modern maize hybrids. The development of hybrids, first double-cross and later single-cross hybrids, along with a transition to high input farming provided huge yield increases, which have continued to improve with improving technology.
Increase in maize production also caused a rise in Western corn Rootworm (Diabrotica virgifera ...
A New Species Of Dinonigidius De Lisle From Sri Lanka (Coleoptera: Lucanidae), 2016 University of Nebraska-Lincoln
A New Species Of Dinonigidius De Lisle From Sri Lanka (Coleoptera: Lucanidae), M. J. Paulsen
Dinonigidius bartolozzii Paulsen, new species, (Coleoptera: Lucanidae) is described from Sri Lanka, and compared with the only other species of the genus, D. ahenobarbus de Lisle from India.
Relationships Between Nutrients, Periphyton Abundance, And Benthic Macroinvertebrate Scrapers In Ozark Highland Streams, 2016 University of Arkansas, Fayetteville
Relationships Between Nutrients, Periphyton Abundance, And Benthic Macroinvertebrate Scrapers In Ozark Highland Streams, Harrison Smith
Biological Sciences Undergraduate Honors Theses
We collected samples from seven Arkansas streams during the months of August 2014 and February 2015 with the objective of determining possible relationships between nutrients, periphyton abundance and benthic macroinvertebrates. We hypothesized that periphyton would be positively associated with nutrients, and that increases in periphyton biomass would increase the abundance and diversity of benthic scraper families. Samples were collected from three transects at each site. The periphyton was analyzed for carbon, nitrogen, phosphorus, and ash free dry mass and Chl-a content. Macroinvertebrates families belonging to the feeding group of grazers/scrapers were compared with water column and periphyton nutrient concentrations ...
Nocturnal Foraging Enhanced By Enlarged Secondary Eyes In A Net-Casting Spider, 2016 University of Nebraska–Lincoln
Nocturnal Foraging Enhanced By Enlarged Secondary Eyes In A Net-Casting Spider, Jay A. Stafstrom, Eileen A. Hebets
Eileen Hebets Publications
Animals that possess extreme sensory structures are predicted to have a related extreme behavioral function. This study focuses on one such extreme sensory structure—the posterior median eyes of the net-casting spider Deinopis spinosa. Although past research has implicated the importance of vision in the nocturnal foraging habits of Deinopis, no direct link between vision in the enlarged eyes and nocturnal foraging has yet been made. To directly test the hypothesis that the enlarged posterior median eyes facilitate visually based nocturnal prey capture, we conducted repeated-measures, visual occlusion trials in both natural and laboratory settings. Our results indicate that D ...
Height Perception Of Bed Bugs, Cimex Lectularius, 2016 Southern Adventist University
Height Perception Of Bed Bugs, Cimex Lectularius, Loren D. Hall
Senior Research Projects
It has been demonstrated that there is no significant difference in Bed bug preference for colored columns of two heights and that Bed bugs tend to hide in harborages when not stimulated. More information, however, is still needed on their visual perception and general behavior. The following study investigated height perception of Bed bugs by determining the total number of bugs that migrated toward Bed bug interceptors representing different elevations over several trials. A significant difference was found between the number of bugs that migrated toward the control and experimental elevations (3”, 6”, 9”) and the number that migrated toward ...
Managing Drought Stress In California Agricultural Systems, 2016 University of Nebraska-Lincoln
Managing Drought Stress In California Agricultural Systems, Gregory D. Brittain Jr.
Doctoral Documents from Doctor of Plant Health Program
California is currently facing a historic drought, and this has led many farmers in the state to severely cut back on irrigation. Optimal use of water for irrigation requires a comprehensive understanding of how plants respond physiologically to water stress (Chapter 1). By monitoring water requirements in crops and managing irrigation to meet those requirements, growers can significantly reduce water use (Chapter 2). This can be done through improving application efficiency of irrigation technology as well as increasing the water use efficiency of the crops themselves. Deficit irrigation practices can be used to manipulate the physiology of water use in ...
Ecological Risks Of The Conventional Insecticide/Fungicide Seed Treatment Mixture Of Thiamethoxam And Mefenoxam In Soybean On Beneficial Insects, 2016 University of Nebraska-Lincoln
Ecological Risks Of The Conventional Insecticide/Fungicide Seed Treatment Mixture Of Thiamethoxam And Mefenoxam In Soybean On Beneficial Insects, Carolina Camargo
Dissertations and Student Research in Entomology
The impact of neonicotinoid seed treatments on beneficial insects has been a controversial topic during the last years. While neonicotinoids are usually used as mixtures with systemic fungicides, few studies have examined the impact of the mixtures on beneficial insects. Pesticide mixtures can have synergistic, additive, or antagonistic effects on the toxicity of neonicotinoids on non-target species.
Thiamethoxam with mefenoxam is the most used neonicotinoid insecticide/fungicide mixture applied to soybean. Based on the systemic nature of thiamethoxam and mefenoxam, residues of this insecticide/fungicide mixture can be present in soybean vegetative and floral tissue with potential impacts to beneficial ...
Export Of Insect Ecosystem Services From Hayed Native Prairie, 2016 University of Nebraska-Lincoln
Export Of Insect Ecosystem Services From Hayed Native Prairie, Wayne J. Ohnesorg
Dissertations and Student Research in Entomology
Natural areas, such as prairie, have the potential to provide the benefits of pest suppression and pollination for agricultural production. In Nebraska, prairie is often used for hay production. The impact of prairie hay production management practices on beneficial arthropods is not well understood. Four prairie hay meadows adjacent to row crop fields were selected in northeast Nebraska. The goal was to assess the impact of haying them on beneficial arthropods and the movement of natural enemies into adjacent crop fields. Three management practices were evaluated for hay harvested from prairie meadows one cut per growing season, two cuts per ...
Arthropods Infesting Small Mammals (Insectivora And Rodentia) Near Cedar Point Biological Station In Southwestern Nebraska, 2016 University of Nebraska–Lincoln
Arthropods Infesting Small Mammals (Insectivora And Rodentia) Near Cedar Point Biological Station In Southwestern Nebraska, Lindsey Howell, Katelyn Jelden, S. Elizabeth Rácz, Scott L. Gardner, Donald D. Gettinger
Cedar Point Biological Station (CPBS) is located in the mixed grass prairie of the central Great Plains, at the transition between the subregions known as the “tall grass” and “short grass” prairies. Adding to the habitat diversity, there are wetlands and riparian habitats associated with the North Platte River and the edge of the Sandhills region of north central Nebraska. This concurrence of habitats supports a diverse small mammal community. The purpose of this paper is to assemble all published information on ectoparasites associated with small mammals (Insectivora, Rodentia) of southwestern Nebraska, and to report the results of an intensive ...
Mapping Tick Abundance In Ozark Forests, 2016 Arts and Sciences
Mapping Tick Abundance In Ozark Forests, Thomas Van Horn
Thomas Van Horn
North American Entomophagy, 2016 Wayne State University
North American Entomophagy, Joohi Schrader, Dennis G. A. B Oonincx, Maria Pontes Ferreira
Nutrition and Food Science Faculty Research Publications
Eating insects is not a common Northern American practice today. However, in the past a variety of insect species was consumed in Northern America (north of Mexico including Greenland). The aim of this literature review is to provide an historical overview of North American entomophagy based upon both peer and non-peer reviewed sources on this topic. Regional differences in insect consumption and reasons for being underreported are discussed. We show that North American natives, and in certain cases colonists, collected and consumed a large variety of edible insects. These are categorized per order and where available, information on how these ...