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Producing Quality Barley For The Malting Industry, Haley H. Oser DPH 2015 University of Nebraska-Lincoln

Producing Quality Barley For The Malting Industry, Haley H. Oser Dph

Doctoral Documents from Doctor of Plant Health Program

The University of Nebraska – Lincoln Doctor of Plant Health program requires each student to fulfill a professional internship over the last summer of the program. For my internship, I worked as a Barley Scientist Intern for MillerCoors and Golden Malting in Golden, Colorado. During this internship I gained a fundamental understanding of malting barley production with a significant emphasis on grain quality. Barley produced for malting must fulfill strict industry quality standards before it is accepted by the head maltsters. These quality standards include: a high germination rate, low moisture content, protein content within an acceptable range and the grain ...


Behavioural Responses Of Stable Flies To Cattle Manure Slurry Associated Odourants, K. Tangtrakulwanich, T. A. Albuquerque, Gary Brewer, Fred P. Baxendale, Ludek Zurek, Daniel N. Miller, David B. Taylor, Kristina A. Friesen, Junwei J. Zhu 2015 University of Nebraska-Lincoln

Behavioural Responses Of Stable Flies To Cattle Manure Slurry Associated Odourants, K. Tangtrakulwanich, T. A. Albuquerque, Gary Brewer, Fred P. Baxendale, Ludek Zurek, Daniel N. Miller, David B. Taylor, Kristina A. Friesen, Junwei J. Zhu

David B. Taylor

Stable flies (Stomoxys calcitrans [Diptera: Muscidae] L.) are blood-feeding synanthropic pests, which cause significant economic losses in livestock. Stable fly antennae contain olfactory sensilla responsive to host and host environment-associated odours. Field observation indicated that the abundance of stable flies increased significantly in grasslands or crop fields when cattle manure slurry was applied. Major volatile compounds emanating from manure slurry were collected and identified. Behavioural responses of stable flies to those compounds were investigated in laboratory bioassays and field-trapping studies. Results from olfactometer assays revealed that phenol, p-cresol and m-cresol were attractive to adult stable flies. When tested individually, attraction ...


John Brandt Collection, Brantley Palmer 2015 Keene State College

John Brandt Collection, Brantley Palmer

Finding Guides

John Henry Brandt was a professional career officer with the U.S. State Department, the U.S. Public Health Service and the U.S. Military. His government service includes eight years spent working in Southeast Asia in the 1960's, three years in the Micronesian Islands and ten years in the United States, primarily among the Navajo, Ute, Dakota, Chippewa, Pueblo and Apache. During his service overseas he collected ethnological materials in New Guinea, Micronesia and Southeast Asia. These collections were deposited in the American Museum of National History, the Milwaukee Museum, the Kenosha Museum, the Anthropology Museum of Mexico ...


Prehistoric Earth Oven Facilities And The Pathoecology Of Chagas Disease In The Lower Pecos Canyonlands, Karl Reinhard, Adauto Araujo 2015 University of Nebraska-Lincoln

Prehistoric Earth Oven Facilities And The Pathoecology Of Chagas Disease In The Lower Pecos Canyonlands, Karl Reinhard, Adauto Araujo

Papers in Natural Resources

Understanding the endemic region of a disease is part of developing a concept of the disease’s natural history and its threat to human health in both ancient and modern times. Chagas disease is caused by the parasite Trypanosoma cruzi and has recently been identified as an emergent disease in North America. Ancient endemicity and reemergence has been demonstrated by an examination of a mummy found on the border between Coahuila, Mexico and Texas, USA. This mummified man, who died over 1000 years ago, exhibits the gross pathology of megacolon, which is consistent with Chagas disease. We are now exploring ...


Biology And Control Of The Bed Bug Cimex Lectularius L., Kevin Hinson 2015 Clemson University

Biology And Control Of The Bed Bug Cimex Lectularius L., Kevin Hinson

All Dissertations

After vanishing from the public eye for more than 50 years, bed bugs have resurged to become one of the most widely discussed and heavily researched insect pests in the westernized world. Our inability to prevent and successfully treat infestations has been the driving force behind this wave of research. I addressed gaps in our understanding of bed bugs by examining behavioral and life history characteristics, as well as insecticide application responses. I showed that natural-based products are generally ineffective against bed bugs, particularly when used as a residual treatment. I also found that bed bugs may be killed through ...


Invasiveness Of An Exotic Gall Wasp Is Influenced By Interactions With Exotic And Endemic Organisms, Ignazio Graziosi 2015 University of Kentucky

Invasiveness Of An Exotic Gall Wasp Is Influenced By Interactions With Exotic And Endemic Organisms, Ignazio Graziosi

Theses and Dissertations--Entomology

American chestnut was once a crucial component of North American forests, but it was functionally eliminated by the introduction of the chestnut blight fungus. Chestnut is recently experiencing resurgence, but the introduced Asian chestnut gall wasp, a specialist herbivore, threatens chestnut recovery. I characterized this invasion and the interactions developing with host associates as the gall wasp spread in North America. Gall wasp dispersal is attributable to host plant distribution, effects of prevailing winds during adult insect emergence, and to topography. This knowledge may be useful to more accurately predict locations of future gall wasp infestations. Gall wasp invasiveness is ...


Comparisons Of Antifeedancy And Spatial Repellency Of Three Natural Product Repellents Against Horn Flies, Haematobia Irritans (Diptera:Muscidae), Junwei J. Zhu, Gary J. Brewer, David J. Boxler, Kristina A. Friesen, David B. Taylor 2015 USDA-ARS Agroecosystem Management Research Unit

Comparisons Of Antifeedancy And Spatial Repellency Of Three Natural Product Repellents Against Horn Flies, Haematobia Irritans (Diptera:Muscidae), Junwei J. Zhu, Gary J. Brewer, David J. Boxler, Kristina A. Friesen, David B. Taylor

David B. Taylor

BACKGROUND: Horn flies are among the most important biting fly pests of cattle in the United States. Horn fly management is largely dependent upon pesticides, which ultimately leads to the rapid development of insecticide resistance. Alternative control strategies, including repellents, have shown promising results in reducing fly biting. In the present study, we examined the efficacy and longevity of recently identified natural product repellents against horn flies. RESULTS: Catnip oil, geraniol and C8910 acids reduced horn fly feeding in a laboratory bioassay and also exhibited spatial repellency in the olfactometer. Residual activity was observed for up to 3 days in ...


The Efficacy And Non-Target Impacts Of An Organic Disease Management System Containing Biostimulants Compared With Two Sulfur-Based Systems On Four Apple Cultivars In Vermont, Ann L. Hazelrigg 2015 University of Vermont

The Efficacy And Non-Target Impacts Of An Organic Disease Management System Containing Biostimulants Compared With Two Sulfur-Based Systems On Four Apple Cultivars In Vermont, Ann L. Hazelrigg

Graduate College Dissertations and Theses

Disease management in organic apple orchards in Vermont is focused on controlling diseases with sulfur fungicides. The objective of this two year study was to evaluate the target and non-target effects of an organic disease management system containing agricultural biostimulants compared to two sulfur-based systems on foliar and fruit diseases, pest and beneficial arthropods, tree growth, yield and fruit quality on four cultivars, `Ginger Gold', `Honeycrisp' and `Liberty' and `Zestar!'. Trees were arranged in a complete randomized design of five three-tree replications in a certified organic orchard. The two sulfur-based systems differed in the number of applications; in the third ...


Managing Threats To The Urban Forest: From Dutch Elm Disease To Emerald Ash Borer - Learning From Experience, Christopher J. Borman 2014 University of Nebraska-Lincoln

Managing Threats To The Urban Forest: From Dutch Elm Disease To Emerald Ash Borer - Learning From Experience, Christopher J. Borman

Doctoral Documents from Doctor of Plant Health Program

The urban forest provides important essential services to all municipalities; however, its value is often overlooked. The urban forest contributes to energy savings, environmental benefits, psychological well-being, and social benefits. Managing the urban forest in a sustainable manner is important if we wish to benefit from these services well into the future. Reliable management techniques have been created through previous experiences with pests, and these should be utilized and improved for use on urban forests.

American elm (Ulmus americana L.) was once a major component of the urban forests of North America. In 1927, Dutch elm disease (DED) was introduced ...


Low Temperature Tolerance Of Adult Drosophila Suzukii (Diptera: Drosophilidae), Ruth Jakobs 2014 The University of Western Ontario

Low Temperature Tolerance Of Adult Drosophila Suzukii (Diptera: Drosophilidae), Ruth Jakobs

University of Western Ontario - Electronic Thesis and Dissertation Repository

The crop pest Drosophila suzukii, native to Southeast Asia, has been found in Ontario since 2010. This raises concern with respect to it establishing permanent populations, however, little is known about its cold tolerance. I investigated the low-temperature tolerance, including phenotypic plasticity, of D. suzukii. While acclimation increased cold tolerance, there was no evidence of short-term cold-hardening. Chill coma occurs at -1.2 °C, which will limit winter activity. Cold shock decreased the reproductive output of females, but this negative effect may be mitigated by re-mating. Drosophila suzukii is chill-susceptible and 80 % of the flies die after exposure to -7 ...


The Effect Of Agricultural Practices On Sugar Beet Root Aphid (Pemphigus Betae Doane) And Beneficial Epigeal Arthropods, Rudolph J. Pretorius 2014 University of Nebraska-Lincoln

The Effect Of Agricultural Practices On Sugar Beet Root Aphid (Pemphigus Betae Doane) And Beneficial Epigeal Arthropods, Rudolph J. Pretorius

Dissertations and Student Research in Entomology

This study investigated the effect of several agricultural practices on the sugar beet root aphid (Pemphigus betae Doane) and beneficial epigeal natural enemies in western Nebraska sugar beet agroecosystems. Eight glyphosate-tolerant sugar beet varieties were evaluated under field conditions for their resistance to root aphids. High levels of aphid resistance were detected for some varieties. In conjunction to this, pitfall sampling was conducted to determine the beneficial epigeal natural enemy complex in the area, which could contribute to the management of both root aphids and glyphosate-resistant weeds. Ground beetles comprised an important and abundant component of this fauna, with 79 ...


Mp763: Without Benefit Of Insects: The Story Of Edith M. Patch Of The University Of Maine, K. Elizabeth Gibbs 2014 The University of Maine

Mp763: Without Benefit Of Insects: The Story Of Edith M. Patch Of The University Of Maine, K. Elizabeth Gibbs

Miscellaneous Publications

A biography of noted entomologist Edith M. Patch, focusing on her time and research at the University of Maine


The Seasonality Of Two Parasitoids (Spathius Agrili And Tetrastichus Planipennisi) Of The Emerald Ash Borer, Agrilus Planipennis, And A Survey For Native Natural Enemies Of The Emerald Ash Borer In Eastern Tennessee, Nicholas Andrew Hooie 2014 University of Tennessee - Knoxville

The Seasonality Of Two Parasitoids (Spathius Agrili And Tetrastichus Planipennisi) Of The Emerald Ash Borer, Agrilus Planipennis, And A Survey For Native Natural Enemies Of The Emerald Ash Borer In Eastern Tennessee, Nicholas Andrew Hooie

Masters Theses

The emerald ash borer (EAB), Agrilus planipennisi Fairmaire (Coleoptera: Buprestidae), is an invasive species of bark borer native to eastern Asia whose primary habitat and food sources are trees in the genus Fraxinus. EAB is a major pest of all North American Fraxinus species and is responsible for mortality of millions of trees across its current North American range of 23 U.S states and 2 Canadian providences. After the discovery of EAB in Tennessee in 2010, parasitoid releases were started under the national EAB Biological Control Program. A research project was initiated in 2012 to 1) study the seasonality ...


Field Abundance And Performance Of Hoverflies (Diptera: Syrphidae) On Soybean Aphid, James O. Eckberg, Julie A. Peterson, Colin P. Borsh, Joe M. Kaser, Gregg A. Johnson, John C. Luhman, Donald L. Wyse, George E. Heimpel 2014 University of Minnesota

Field Abundance And Performance Of Hoverflies (Diptera: Syrphidae) On Soybean Aphid, James O. Eckberg, Julie A. Peterson, Colin P. Borsh, Joe M. Kaser, Gregg A. Johnson, John C. Luhman, Donald L. Wyse, George E. Heimpel

West Central Research and Extension Center, North Platte

The management of the soybean aphid Aphis glycines Matsumara is a major challenge to soybean production in the north-central United States. The identification and characterization of the insect predator community has informed integrated pest management strategies by providing insight on predators that can suppress soybean aphid populations. Hoverflies (Diptera: Syrphidae) are known predators of A. glycines, but more information is needed on their diversity, abundance, and performance to evaluate their importance as biological control agents of A. glycines. In this study, syrphid abundance was evaluated across two growing seasons in four soybean fields in east-central Minnesota. Six methods were used ...


Dangerous Mating Systems: Signal Complexity, Signal Content And Neural Capacity In Spiders, Marie E. Herberstein, Anne E. Wignall, Eileen Hebets, Jutta M. Schneider 2014 Macquarie University, Sydney, Australia

Dangerous Mating Systems: Signal Complexity, Signal Content And Neural Capacity In Spiders, Marie E. Herberstein, Anne E. Wignall, Eileen Hebets, Jutta M. Schneider

Eileen Hebets Publications

Spiders are highly efficient predators in possession of exquisite sensory capacities for ambushing prey, combined with machinery for launching rapid and determined attacks. As a consequence, any sexually motivated approach carries a risk of ending up as prey rather than as a mate. Sexual selection has shaped courtship to effectively communicate the presence, identity, motivation and/or quality of potential mates, which help ameliorate these risks. Spiders communicate this information via several sensory channels, including mechanical (e.g. vibrational), visual and/or chemical, with examples of multimodal signaling beginning to emerge in the literature. The diverse environments that spiders inhabit ...


De Novo Transcriptome Of The Hemimetabolous German Cockroach (Blattella Germanica), Xiaojie Zhou, Kun Qian, Ying Tong, Junwei Jerry Zhu, Xinghui Qiu, Xiaopeng Zeng 2014 Beijing Center for Disease Control and Prevention

De Novo Transcriptome Of The Hemimetabolous German Cockroach (Blattella Germanica), Xiaojie Zhou, Kun Qian, Ying Tong, Junwei Jerry Zhu, Xinghui Qiu, Xiaopeng Zeng

Publications from USDA-ARS / UNL Faculty

Background: The German cockroach, Blattella germanica, is an important insect pest that transmits various pathogens mechanically and causes severe allergic diseases. This insect has long served as a model system for studies of insect biology, physiology and ecology. However, the lack of genome or transcriptome information heavily hinder our further understanding about the German cockroach in every aspect at a molecular level and on a genome-wide scale. To explore the transcriptome and identify unique sequences of interest, we subjected the B. germanica transcriptome to massively parallel pyrosequencing and generated the first reference transcriptome for B. germanica.

Methodology/Principal Findings: A ...


Natural Egg Sac Clutch Size Of The Brown Widow Spider, Latrodectus Geometricus (Araneae: Theridiidae) In Southern California, Douglas W. R. Danielsen, Daniel E. Clarke, Stephan J. Valle, Amy A. Anselmo, Leonard S. Vincent, Richard S. Vetter 2014 Fullerton College

Natural Egg Sac Clutch Size Of The Brown Widow Spider, Latrodectus Geometricus (Araneae: Theridiidae) In Southern California, Douglas W. R. Danielsen, Daniel E. Clarke, Stephan J. Valle, Amy A. Anselmo, Leonard S. Vincent, Richard S. Vetter

Bulletin of the Southern California Academy of Sciences

Abstract. We investigated egg sac clutch size of the brown widow spider, Latrodectus geometricus C. L. Koch, in southern California from June through October 2012 by counting eggs from 214 field collected egg sacs. Clutch size was fairly constant over this five-month period averaging 129.0 ± 51.0 eggs per sac with the only significant monthly difference being more eggs in September than June. Determining the relatively constant egg production for this period contributed knowledge to another project involving application of pesticide to brown widow egg sacs in attempted control of this newly established invasive pest species.


Molecular Xenomonitoring Using Mosquitoes To Map Lymphatic Filariasis After Mass Drug Administration In American Samoa, Mark A. Schmaedick, Amanda L. Koppel, Nils Pilotte, Melissa Torres, Steven A. Williams, Stephen L. Dobson, Patrick J. Lammie, Kimberly Y. Won 2014 American Samoa Community College

Molecular Xenomonitoring Using Mosquitoes To Map Lymphatic Filariasis After Mass Drug Administration In American Samoa, Mark A. Schmaedick, Amanda L. Koppel, Nils Pilotte, Melissa Torres, Steven A. Williams, Stephen L. Dobson, Patrick J. Lammie, Kimberly Y. Won

Entomology Faculty Publications

BACKGROUND: Mass drug administration (MDA) programs have dramatically reduced lymphatic filariasis (LF) incidence in many areas around the globe, including American Samoa. As infection rates decline and MDA programs end, efficient and sensitive methods for detecting infections are needed to monitor for recrudescence. Molecular methods, collectively termed 'molecular xenomonitoring,' can identify parasite DNA or RNA in human blood-feeding mosquitoes. We tested mosquitoes trapped throughout the inhabited islands of American Samoa to identify areas of possible continuing LF transmission after completion of MDA.

METHODOLOGY/PRINCIPLE FINDINGS: Mosquitoes were collected using BG Sentinel traps from most of the villages on American Samoa ...


Host Specificity And Ectoparasite Load Of Bat Flies In Utila, Honduras, Courtney Miller 2014 University of New Orleans

Host Specificity And Ectoparasite Load Of Bat Flies In Utila, Honduras, Courtney Miller

Senior Honors Theses

Bat flies (Streblidae) are obligate blood-feeding ectoparasites of bats that display varying degrees of host specificity. A total of 265 streblid bat flies were collected from 122 bats belonging to the families Phyllostomidae and Natalidae from Utila, the smallest bay island of Honduras. Out of four host-parasite associations, three were considered primary. Out of the three bat species analyzed, one had significantly lower parasite prevalence and another had significantly higher parasite load and intensity. Both male and female bats were equally likely to be infested and variables of parasite density did not differ amongst host sex for any species. However ...


Rna Interference As A Tool For The Functional Analysis Of Genes In The Colorado Potato Beetle, Leptinotarsa Decemlineata (Say), Ashley Danielle Yates 2014 University of Nebraska-Lincoln

Rna Interference As A Tool For The Functional Analysis Of Genes In The Colorado Potato Beetle, Leptinotarsa Decemlineata (Say), Ashley Danielle Yates

Dissertations and Student Research in Entomology

RNA interference (RNAi) is a naturally occurring phenomenon in eukaryotes in which a double-stranded RNA (dsRNA) suppresses the expression of a target gene. RNAi has markedly changed the way in which functional genetics studies are performed, especially in non-model organisms. In insects, the efficacy of RNAi is influenced by several factors, including the species and the methods of dsRNAs delivery.

The Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), is a pest of the plant family Solanaceae. RNAi in the CPB is of interest for potential use in insect management and as a tool to study the interaction with host plants ...


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