Open Access. Powered by Scholars. Published by Universities.®

Entomology Commons

Open Access. Powered by Scholars. Published by Universities.®

5,010 Full-Text Articles 5,794 Authors 345,322 Downloads 89 Institutions

All Articles in Entomology

Faceted Search

5,010 full-text articles. Page 1 of 90.

Dynamics Of Two Pathogens In A Single Tick Population, Alexis White 2016 Old Dominion University

Dynamics Of Two Pathogens In A Single Tick Population, Alexis White

Biology and Medicine Through Mathematics Conference

No abstract provided.


Characterization Of Glycine Rich Proteins From The Salivary Glands Of The Lone Star Tick Amblyomma Americanum, Rebekah Lynn Bullard 2016 University of Southern Mississippi

Characterization Of Glycine Rich Proteins From The Salivary Glands Of The Lone Star Tick Amblyomma Americanum, Rebekah Lynn Bullard

Dissertations

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 ...


A Brief History Of Corn: Looking Back To Move Forward, Jon Derek Pruitt 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 ...


Height Perception Of Bed Bugs, Cimex Lectularius, Loren D. Hall 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, Gregory D. Brittain Jr. 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, Carolina Camargo 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, Wayne J. Ohnesorg 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 ...


Mapping Tick Abundance In Ozark Forests, Thomas Van Horn 2016 Arts and Sciences

Mapping Tick Abundance In Ozark Forests, Thomas Van Horn

Thomas Van Horn

The Lone Star Tick (Amblyomma americanum) is a common outdoor pest in the Missouri Ozarks and the vector of several pathogens that cause disease in humans, including Monocytic Ehrlichiosis, Southern Tick-Associated Rash Illness (STARI), and a recently identified red meat allergy. This tick is an active questing species that primarily feeds on deer and small mammals and frequently comes in contact with humans. While much is known about the life cycle and host preference of A. americanum, few have examined the landscape-scale abundance of this vector species. In this preliminary study, we investigated the abundance of tick species at the ...


North American Entomophagy, Joohi Schrader, Dennis G. A. B Oonincx, Maria Pontes Ferreira 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 ...


Phylogeny Of The Oniticellini And Onthophagini Dung Beetles (Scarabaeidae, Scarabaeinae) From Morphological Evidence, T. Keith Philips 2016 Western Kentucky University

Phylogeny Of The Oniticellini And Onthophagini Dung Beetles (Scarabaeidae, Scarabaeinae) From Morphological Evidence, T. Keith Philips

Biology Faculty Publications

A phylogenetic study was conducted to hypothesize relationships of most of the genera of the Oniticellini and Onthophagini for the first time using morphological characters from a diverse array of external and internal sclerites. The monophyly and sister relationship of both tribes was found using Bayesian and parsimony analyses with heavily to moderately weighted data. An alternative hypothesis based on parsimony analyses of unweighted or slightly weighted data show a paraphyletic Oniticellini without the Onthophagini, although recognition of the subtribe Helictopleurina as a tribe would eliminate non-monophyly.

Of the three Oniticellini subtribes, the Helictopleurina and Drepanocerina are monophyletic. There is ...


Permian Scorpions From The Petrified Forest Of Chemnitz, Germany, Jason A. Dunlop, David A. Legg, Paul L. Selden, Victor Fet, Joerg W. Schneider, Ronny Rößler 2016 Marshall University

Permian Scorpions From The Petrified Forest Of Chemnitz, Germany, Jason A. Dunlop, David A. Legg, Paul L. Selden, Victor Fet, Joerg W. Schneider, Ronny Rößler

Biological Sciences Faculty Research

Background: Paleozoic scorpions (Arachnida: Scorpiones) have been widely documented from the Carboniferous Period; which hosts a remarkable assemblage of more than sixty species including both putative stem- and crown-group fossils. By contrast the succeeding Permian Period is almost completely devoid of records, which are currently restricted to a trace fossil from the early Permian of New Mexico, USA and some limb fragments from the late Permian of the Vologda Region, Russia.

Results: ?Opsieobuthus tungeri sp. nov. from the Petrified Forest of Chemnitz, Germany represents the first complete body fossils of scorpions from the Permian. Explosive volcanism preserved these remarkable specimens ...


Dispersal And Sampling Of The Wheat Stem Sawfly, Cephus Cintus Norton, (Hymenoptera: Cephidae), Christopher McCullough 2016 University of Nebraska-Lincoln

Dispersal And Sampling Of The Wheat Stem Sawfly, Cephus Cintus Norton, (Hymenoptera: Cephidae), Christopher Mccullough

Dissertations and Student Research in Entomology

The wheat stem sawfly, Cephus cinctus Norton (Hymenoptera: Cephidae), is a serious insect pest of wheat, Triticum aestivum L., in the northern central Great Plains. The sawfly has been a pest of wheat in Montana, North Dakota, and Canada since the early 20th century. It was first detected in Nebraska winter wheat in the early 1990s, in Scotts Bluff County. The sawfly has since spread throughout the Nebraska Panhandle region and become a pest of serious concern. To gain a better understanding of the sawfly in Nebraska, investigations on the emergence, dispersal, and sampling of the sawfly were conducted ...


Pharmacological Characterization Of A Tyramine Receptor From The Southern Cattle Tick, Rhipicephalus (Boophilus) Microplus, Aaron Gross, Kevin Temeyer, Timothy Day, Adalberto Pérez de León, Michael Kimber, Joel Coats 2016 Iowa State University

Pharmacological Characterization Of A Tyramine Receptor From The Southern Cattle Tick, Rhipicephalus (Boophilus) Microplus, Aaron Gross, Kevin Temeyer, Timothy Day, Adalberto Pérez De León, Michael Kimber, Joel Coats

Michael Kimber

The southern cattle tick (Rhipicephalus (Boophilus) microplus) is a hematophagous external parasite that vectors the causative agents of bovine babesiosis or cattle tick fever, Babesia bovis and B. bigemina, and anaplasmosis, Anaplasma marginale. The southern cattle tick is a threat to the livestock industry in many locations throughout the world. Control methods include the use of chemical acaricides including amitraz, a formamidine insecticide, which is proposed to activate octopamine receptors. Previous studies have identified a putative octopamine receptor from the southern cattle tick in Australia and the Americas. Furthermore, this putative octopamine receptor could play a role in acaricide resistance ...


Quantitative Structure-Activity Relationships (Qsars) Of Monoterpenoids At An Expressed American Cockroach Octopamine Receptor, Aaron Gross, Michael Kimber, Timothy Day, Paula Ribeiro, Joel Coats 2016 Iowa State University

Quantitative Structure-Activity Relationships (Qsars) Of Monoterpenoids At An Expressed American Cockroach Octopamine Receptor, Aaron Gross, Michael Kimber, Timothy Day, Paula Ribeiro, Joel Coats

Michael Kimber

Monoterpenoids are found in essential oils from numerous plant families. Octopamine is a biogenic monoamine found within various invertebrates, including insects. Octopamine exerts its physiological effects through the activation of G-protein-coupled receptors (GPCRs). GPCRs are an under-utilized receptor target in the agrochemical industry. Here we report the expression of an octopamine receptor from the brain of the American cockroach (Periplaneta americana) inSaccharomyces cerevisiae, creating a ligand-independent histidine-auxotrophic assay. The majority of monoterpenoids acted as an inverse agonist in this system. Three QSAR models show that electronic properties are most important for monoterpenoid interaction with this octopamine receptor in this ...


Development Of An In Vivo Rnai Protocol To Investigate Gene Function In The Filarial Nematode, Brugia Malayi, Chuanzhe Song, Jack Gallup, Timothy Day, Lyric Bartholomay, Michael Kimber 2016 Iowa State University

Development Of An In Vivo Rnai Protocol To Investigate Gene Function In The Filarial Nematode, Brugia Malayi, Chuanzhe Song, Jack Gallup, Timothy Day, Lyric Bartholomay, Michael Kimber

Michael Kimber

Our ability to control diseases caused by parasitic nematodes is constrained by a limited portfolio of effective drugs and a paucity of robust tools to investigate parasitic nematode biology. RNA interference (RNAi) is a reverse-genetics tool with great potential to identify novel drug targets and interrogate parasite gene function, but present RNAi protocols for parasitic nematodes, which remove the parasite from the host and execute RNAi in vitro, are unreliable and inconsistent. We have established an alternative in vivo RNAi protocol targeting the filarial nematode Brugia malayi as it develops in an intermediate host, the mosquito Aedes aegypti. Injection of ...


Phytoremediation Of Herbicide-Contaminated Surface Water With Aquatic Plants, Pamela Rice, Todd Anderson, Joel Coats 2016 Iowa State University

Phytoremediation Of Herbicide-Contaminated Surface Water With Aquatic Plants, Pamela Rice, Todd Anderson, Joel Coats

Joel R. Coats

There is current interest in the use of artificial wetlands and macrophyte-cultured ponds for the treatment of agricultural drainage water, sewage, and industrial effluents. Aquatic plant-based water treatment systems have proved effective and economical in improving the quality of wastewaters containing excess nutrients, organic pollutants, and heavy metals. This investigation was conducted to test the hypothesis that herbicide-tolerant aquatic plants can remediate herbicide-contaminated waters. The addition of Ceratophyllum demersum (coontail, hornwort), Elodea canadensis (American elodea, Canadian pondweed), or Lemna minor(common duckweed) significantly (p < 0.01) reduced the concentration of [14C]metolachlor (MET) remaining in the treated water. After a 16-day incubation period, only 1.44%, 4.06%, and 22.7% of the applied [14C]MET remained in the water of the surface water systems containing C. demersum, E. canadensis, or L. minor whereas 61% of the applied [14C]MET persisted in ...


The Use Of Native Prairie Grasses To Degrade Atrazine And Metolachlor In Soil, Shaohan Zhao, Ellen Arthur, Joel Coats 2016 ABC Laboratories

The Use Of Native Prairie Grasses To Degrade Atrazine And Metolachlor In Soil, Shaohan Zhao, Ellen Arthur, Joel Coats

Joel R. Coats

The ability of native prairie grasses, big bluestem (Andropogon gerardii Vitman), Yellow indiangrass (Sorghastrum nutans L.), and switchgrass (Panicum virgatum L.), to degrade atrazine and metolachlor was evaluated in two soils denoted as Alpha and Bravo soils. Vegetation significantly decreased the amount of remaining atrazine in Alpha soil when the concentration of atrazine before vegetation was 93 μg g-1, but had no effect on the degradation of atrazine when it was 4.9 μg g-1. The significant effect of the plants on atrazine degradation in Alpha soil occurred at 57 days after the transplanting of vegetation, but not at 28 ...


Natural Insect Repellents: Activity Against Mosquitoes And Cockroaches, Gretchen Schultz, Chris Peterson, Joel Coats 2016 Iowa State University

Natural Insect Repellents: Activity Against Mosquitoes And Cockroaches, Gretchen Schultz, Chris Peterson, Joel Coats

Joel R. Coats

Recent research has focused on the repellent properties of extracts from the catnip plant (Nepeta cataria) and the Osage orange (Madura pomifera) fruit. This chapter includes results on German cockroach (Blattella germanica), and house fly (Musca domestica) contact irritancy to catnip essential oil, and its major components, Z,E-nepetalactone and E,Z-nepetalactone, compared with the commercial standard, N,Ndiethyl-m-toluamide (DEET). Both species showed high percentage repellency values when exposed to filter paper treated with catnip essential oil or the individual nepetalactone isomers. Of the two nepetalactone isomers evaluated, German cockroaches were most responsive to the E ...


Approaches For Managing Corn Rootworm In Iowa, Erin W. Hodgson, Aaron J. Gassmann 2016 Iowa State University

Approaches For Managing Corn Rootworm In Iowa, Erin W. Hodgson, Aaron J. Gassmann

Integrated Crop Management News

Corn rootworm is a persistent and economically important pest in Iowa, with yield loss caused primarily by larval feeding on corn roots. Genetically modified corn with Bt traits kills western and northern rootworm larvae, and Bt-rootworm corn has been available since 2003. However, some Iowa farmers have observed severe root injury to Bt hybrids in continuous cornfields, and there has been documented resistance of western corn rootworm in Iowa to Cry3Bb1 corn and mCry3A corn since 2009 and 2011, respectively.


Pollinator Garden, Paige E. Bradley 2016 Student

Pollinator Garden, Paige E. Bradley

Engagement and Service-Learning Summit

The goal of the project is to increase awareness about global climate change and the necessity of environmentally sustainable practice, particularly among the younger citizens of the Lafayette area. The Lyn Greece Boys & Girls Club extended a hand and offered us land to install a pollinator garden on their campus and an opportunity to meet with the kids one-on-one to promote sustainability ideas and help them understand the basics of gardening. The project is as local as possible, using native plants, no pesticides or herbicides, Bennett's Greenhouse (a local business), and the resources on campus to reach out to ...


Digital Commons powered by bepress