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University of Nebraska - Lincoln

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Articles 2311 - 2340 of 4226

Full-Text Articles in Entomology

Three New Cecidogenous Palaeomystella Fletcher (Lepidoptera, Coleophoridae, Momphinae) Associated With Melastomataceae In Brazil, Victor O. Becker, David Adamski Jan 2008

Three New Cecidogenous Palaeomystella Fletcher (Lepidoptera, Coleophoridae, Momphinae) Associated With Melastomataceae In Brazil, Victor O. Becker, David Adamski

USDA Systematic Entomology Laboratory

Three new cecidogenous Palaeomystella Fletcher (Lepidoptera, Coleophoridae, Momphinae) associated with Melastomataceae in Brazil. Three new cecidogenous Palaeomystella Fletcher (Lepidoptera, Coleophoridae, Momphinae), described herein, induce galls on stems and leaves of Melastomataceae species. They include: Palaeomystella tibouchinae sp. n., on Tibouchina barbigera (Naudin) Baillon, P. oligophaga sp. n., on Macairea radula (Bonpland) de Candolle and M. thyrsiflora de Candolle, and P. henriettiphila sp. n., on Henriettea succosa (Aublet) de Candolle. Adults, including male and female genitalia, larva, pupa, and galls are illustrated and described in detail.

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A Revision Of Australian Thrasorinae (Hymenoptera: Figitidae) With A Description Of A New Genus And Six New Species, Matthew L. Buffington Jan 2008

A Revision Of Australian Thrasorinae (Hymenoptera: Figitidae) With A Description Of A New Genus And Six New Species, Matthew L. Buffington

USDA Systematic Entomology Laboratory

A new genus of Thrasorinae (Hymenoptera: Figitidae) is described from Australia, and includes specimens reared from an unidentified Ophelimus species (Eulophidae: Ophelimini) on Eucalyptus cinerea (Myrtaceae). Mikeius, new genus, includes six species: M. berryi sp. n., M. gatesi sp. n., M. grandawi sp. n., M. hartigi (Girault) n. comb., M. neumanni sp. n. and M. schauffi sp. n.; M. hartigi is designated as the type species of Mikeius. Thrasorus Weld is revised, and the description of T. schmidtae sp. n. is provided, as well as a redescription of T. pilosus Weld. All records to date indicate that species of …

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Biology Of Dendroctonus Murrayanae (Coleoptera: Curculionidae: Scolytinae) In Idaho And Montana And Comparative Taxonomic Notes, Malcolm M. Furniss, Sandra J. Kegley Jan 2008

Biology Of Dendroctonus Murrayanae (Coleoptera: Curculionidae: Scolytinae) In Idaho And Montana And Comparative Taxonomic Notes, Malcolm M. Furniss, Sandra J. Kegley

Entomology Papers from Other Sources

We studied the biology of Dendroctonus murrayanae Hopkins (Coleoptera: Curculionidae: Scolytinae) in lodgepole pine, Pinus contorta Douglas, in Idaho and Montana. The beetle was not a primary agent of tree mortality. Susceptible host trees were physically damaged, had thin foliage, or were otherwise predisposed to infestation. Beetles attacked individual trees, not in groups, near ground level and at low density. Life stages and their behavior are described. Egg galleries were constructed upward and usually had short spurs. Mating occurred in the egg gallery. Eggs were laid in an elongated group, not in niches, in a shallow excavation along only one …

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A Biotic Survey And Inventory Of The Dynastine Scarab Beetles Of Mesoamerica, North America, And The West Indies: Review Of A Long-Term, Multicountry Project, Brett C. Ratcliffe, Ronald D. Cave Jan 2008

A Biotic Survey And Inventory Of The Dynastine Scarab Beetles Of Mesoamerica, North America, And The West Indies: Review Of A Long-Term, Multicountry Project, Brett C. Ratcliffe, Ronald D. Cave

University of Nebraska State Museum: Entomology Papers

This biotic inventory will document the species-level diversity of dynastine scarabs, their spatial and temporal distributions, ecological preferences, and biology. The long term, multi-country research project explores a biotically megadiverse region that is seriously at risk from deforestation, environmental homogenization, invasive species, and urban sprawl. Objectives of this survey are: 1) to understand the biodiversity of dynastine scarab beetles in Mesoamerica; 2) disseminate this information in print and electronic forms; 3) train students, parataxonomists, and collection managers in the study area about dynastine taxonomy and identification, care of collections, dissemination of information, and conservation; and 4) assemble authoritatively identified voucher …

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First Come, First Serve: “Sit And Wait” Behavior In Dung Beetles At The Source Of Primate Dung, Jennifer Jacobs, Ines Nole, Susanne Palminteri, Brett C. Ratcliffe Jan 2008

First Come, First Serve: “Sit And Wait” Behavior In Dung Beetles At The Source Of Primate Dung, Jennifer Jacobs, Ines Nole, Susanne Palminteri, Brett C. Ratcliffe

Department of Entomology: Faculty Publications

Dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae) compete intensively for dung resources, and most species forage in the understory. Here, we describe the unique behavior of one dung beetle species, Canthon aff. quadriguttatus (Olivier), associated with two species of monkeys from Peru. We observed this beetle species on the genital and anal regions of the brown titi monkey, Callicebus brunneus (Wagner), and subsequently falling with dung as the monkeys defecated. The same association was also observed with the bald-faced saki monkey, Pithecia irrorata irrorata (Gray). Using the “sit and wait” at the source behavior, C. quadriguttus may arrive first at the dung …

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Supplementary Material: Agonistic Signals Received By An Arthropod Filiform Hair Allude To The Prevalence Of Near-Field Sound Communication, Roger D. Santer, Eileen Hebets Jan 2008

Supplementary Material: Agonistic Signals Received By An Arthropod Filiform Hair Allude To The Prevalence Of Near-Field Sound Communication, Roger D. Santer, Eileen Hebets

Eileen Hebets Publications

SUPPLEMENTARY METHODS
(i) Analysis of behaviour
(ii) Stimulator design

SUPPLEMENTARY RESULTS
(i) Typical contest behaviour
(ii) Additional data on ALV positioning relative to the receiver
(iii) Electrophysiological control experiments
(iv) Analysis of phase-locking

SUPPLEMENTARY REFERENCES

Includes 3 figures and 1 table.

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Resource Heterogeneity Moderates The Biodiversity-Function Relationship In Real World Ecosystems, Jason M. Tylianakis, Tatyana A. Rand, Ansgar Kahman, Alexandra-Maria Klein, Nina Buchmann, Jörg Perner, Teja Tscharntke Jan 2008

Resource Heterogeneity Moderates The Biodiversity-Function Relationship In Real World Ecosystems, Jason M. Tylianakis, Tatyana A. Rand, Ansgar Kahman, Alexandra-Maria Klein, Nina Buchmann, Jörg Perner, Teja Tscharntke

Entomology Papers from Other Sources

Numerous recent studies have tested the effects of plant, pollinator, and predator diversity on primary productivity, pollination, and consumption, respectively. Many have shown a positive relationship, particularly in controlled experiments, but variability in results has emphasized the context-dependency of these relationships. Complementary resource use may lead to a positive relationship between diversity and these processes, but only when a diverse array of niches is available to be partitioned among species. Therefore, the slope of the diversity-function relationship may change across differing levels of heterogeneity, but empirical evaluations of this pattern are lacking. Here we examine three important functions/properties in different …

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Using Ninhydrin To Detect Gravesoil, David O. Carter, David Yellowlees, Mark Tibbett Jan 2008

Using Ninhydrin To Detect Gravesoil, David O. Carter, David Yellowlees, Mark Tibbett

Department of Entomology: Faculty Publications

Some death scene investigations commence without knowledge of the location of the body and/or decomposition site. In these cases, it is necessary to locate the remains or the site where the body decomposed prior to movement. We hypothesized that the burial of a mammalian cadaver will result in the release of ninhydrin reactive nitrogen (NRN) into associated soil and that this reaction might have potential as a tool for the identification of clandestine graves. Juvenile rat (Rattus rattus) cadavers were buried in three contrasting soil types in Australian tropical savanna ecosystems and allowed to decompose over a period …

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Sugar Feeding In Adult Stable Flies, David B. Taylor, Dennis R. Berkebile Jan 2008

Sugar Feeding In Adult Stable Flies, David B. Taylor, Dennis R. Berkebile

Department of Entomology: Faculty Publications

Adult stable flies (Stomoxys calcitrans L.) are known to feed readily on sugars in the laboratory. However, little is known concerning the extent of stable fly sugar feeding in wild populations. We examined the frequency of sugar feeding in stable flies collected on Alsynite sticky traps in rural and urban environments. In addition, stable flies were visually examined to determine whether blood was present in the gut. In laboratory studies, sugars were detectable with the anthrone technique in stable flies for ~3 d after being imbibed, and blood could be visually detected in the gut for 24-48 h after …

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Nebline, January 2008 Jan 2008

Nebline, January 2008

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

“Parents Forever” Class Teaches Parents How to Help Children Through a Divorce
Coalition to Assist Children of Parents Experiencing Divorce
Nebraska’s New Parenting Act Puts Children at the Center—Not in the Middle—of Divorce
Upcoming Pesticide Applicator Trainings
Crop Protection Clinic, Jan. 22
Computerized Farm Financial Recordkeeping Workshop, Feb. 16
Year-Round Insect Pests in the Home
Ultrasonic/Subsonic Devices Not Effective for Pest Control
Beginning Beekeeping 2-Day Workshop
Got Deer Problems or Pocket Gophers? UNL Wildlife Experts Need Your Help
Florist Azalea Plant Care
A Gardener’s New Year’s Resolutions
Proper Landscape Plant Maintenance
About Soil Testing
Attract More Birds by Offering a …

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A New Species Of Schizomyia (Diptera: Cecidomyiidae), A Pest Of Fernaldia Pandurata (Apocynaceae) In Central America, Raymond Gagne, Rafael Menjivar Jan 2008

A New Species Of Schizomyia (Diptera: Cecidomyiidae), A Pest Of Fernaldia Pandurata (Apocynaceae) In Central America, Raymond Gagne, Rafael Menjivar

USDA Systematic Entomology Laboratory

A new species of gall midge, Schizomyia loroco Gagné (Diptera:Cecidomyiidae), is described from loroco, Fernaldia pandurata (A. DC.) Woodson (Apocynaceae), from El Salvador. Females lay eggs in flower buds that then produce characteristic galls. The new species is described, illustrated, and compared to its congeners.

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A New Species Of Wockia Heinemann, 1890 (Lepidoptera: Urodidae) From Korea, Jae-Cheon Sohn, David Adamski Jan 2008

A New Species Of Wockia Heinemann, 1890 (Lepidoptera: Urodidae) From Korea, Jae-Cheon Sohn, David Adamski

USDA Systematic Entomology Laboratory

Wockia koreana Sohn, n. sp., is described from Korea, representing the first record of Urodidae in eastern Asia. Biological and distributional data including host-plant records are provided. Photographs of the holotype and dimorphic antennal and hind tibial features are included in addition to illustrations of wing venation and male and female genitalia.

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North American Species Of Agrostocynips Diaz (Hymenoptera: Figitidae: Eucoilinae), Parasitoids Of Agromyzidae (Diptera): Bionomics And Taxonomy, Matthew L. Buffington, Sonja J. Scheffer Jan 2008

North American Species Of Agrostocynips Diaz (Hymenoptera: Figitidae: Eucoilinae), Parasitoids Of Agromyzidae (Diptera): Bionomics And Taxonomy, Matthew L. Buffington, Sonja J. Scheffer

USDA Systematic Entomology Laboratory

The genus Agrostocynips Diaz is redescribed, as well as two species endemic to the Nearctic: Agrostocynips diastrophi (Ashmead) and A. robusta (Ashmead). Previous to this study, only Neotropical species of Agrostocynips were well diagnosed both taxonomically and biologically. Agrostocynips belongs to the Zaeucoila group of genera, which are Neotropical eucoilines that principally parasitize Agromyzidae (Diptera); among these genera, species of Agrostocynips are some of the few representatives that are found in the Nearctic. Detailed host records and biological notes are provided for the Nearctic species.

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A New Species Of Eurytoma (Hymenoptera: Eurytomidae) Attacking Quadrastichus Spp. (Hymenoptera: Eulophidae) Galling Erythrina Spp. (Fabaceae), With A Summary Of African Eurytoma Biology And Species Checklist, Michael William Gates, Gerard Delvare Jan 2008

A New Species Of Eurytoma (Hymenoptera: Eurytomidae) Attacking Quadrastichus Spp. (Hymenoptera: Eulophidae) Galling Erythrina Spp. (Fabaceae), With A Summary Of African Eurytoma Biology And Species Checklist, Michael William Gates, Gerard Delvare

USDA Systematic Entomology Laboratory

Eurytoma erythrinae Gates and Delvare, new species, is described and illustrated. This species was reared from fieldcollected galls on Erythrina spp. (Fabaceae) induced by Quadrastichus spp. (Hymenoptera: Eulophidae), in Tanzania, Ghana, and South Africa. It is compared with very similar African species, Eurytoma radicicola Risbec. Afrotropical species classified in Eurytoma are reviewed and twenty-seven new combinations are proposed: Aximopsis acaciacola (Hedqvist) comb. n., A. caryedocida (Rasplus) comb. n., A. lamtoensis (Rasplus) comb. n., A. mateui (Hedqvist) comb. n., A. mimosarum (Rasplus) comb. n., A. obocki (Risbec) comb. n., A …

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Concentration-Dependent Degradation Of Three Termiticides In Soil Under Laboratory Conditions And Their Bioavailability To Eastern Subterranean Termites (Isoptera: Rhinotermitidae), Raj K. Saran, Shripat T. Kamble Jan 2008

Concentration-Dependent Degradation Of Three Termiticides In Soil Under Laboratory Conditions And Their Bioavailability To Eastern Subterranean Termites (Isoptera: Rhinotermitidae), Raj K. Saran, Shripat T. Kamble

Department of Entomology: Faculty Publications

Degradation and bioavailability of imidacloprid, fipronil, and bifenthrin applied at label rates ([AI], wt:wt in soil) in the loamy soil of Nebraska were determined over a 6-mo duration. Based on the calculated half-lives of the three termiticides, it was concluded that the degradation rate was lowest when a termiticide was applied at the highest label rate. Bioassays of Reticulitermes flavipes (Kollar) (Isoptera: Rhinotermitidae) conducted at 8, 31, 65, 90, 135, 160, and 180 d posttreatment showed an inverse relationship between the LT90 values and the variable concentrations. At day 180, exposures to all the termiticide-treated soil samples (concentration × …

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Inheritance Of Cry1f Resistance In Laboratory-Selected European Corn Borer And Its Survival On Transgenic Corn Expressing The Cry1f Toxin, E. J. G. Pereira, N. P. Storer, Blair D. Siegfried Jan 2008

Inheritance Of Cry1f Resistance In Laboratory-Selected European Corn Borer And Its Survival On Transgenic Corn Expressing The Cry1f Toxin, E. J. G. Pereira, N. P. Storer, Blair D. Siegfried

Department of Entomology: Faculty Publications

A major assumption of the high-dose/refuge strategy proposed for insect resistance management strategies for transgenic crop plants that express toxins from Bacillus thuringiensis is that resistance traits that evolve in pest species will be recessive. The inheritance of Cry1F resistance and larval survival on commercially available Cry1F corn hybrids were determined in a laboratory-selected strain of European corn borer, Ostrinia nubilalis (Hu¨ bner), displaying more than 3000-fold resistance to Cry1F. Concentration-response bioassays of reciprocal parental crosses indicated that the resistance is autosomal and recessive. Bioassays of the backcross of the F1 generation with the selected strain were consistent with …

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Invasion Of Europe By The Western Corn Rootworm, Diabrotica Virgifera Virgifera: Multiple Transatlantic Introductions With Various Reductions Of Genetic Diversity, M. Ciosi, Nicholas Miller, R. Giordano, A. Estoup, T. Guillemaud, S. Kim Jan 2008

Invasion Of Europe By The Western Corn Rootworm, Diabrotica Virgifera Virgifera: Multiple Transatlantic Introductions With Various Reductions Of Genetic Diversity, M. Ciosi, Nicholas Miller, R. Giordano, A. Estoup, T. Guillemaud, S. Kim

Department of Entomology: Faculty Publications

The early stages of invasion involve demographic bottlenecks that may result in lower genetic variation in introduced populations as compared to source population/s. Low genetic variability may decrease the adaptive potential of such populations in their new environments. Previous population genetic studies of invasive species have reported varying levels of losses of genetic variability in comparisons of source and invasive populations. However, intraspecific comparisons are required to assess more thoroughly the repeatability of genetic consequences of colonization events. Descriptions of invasive species for which multiple introductions from a single source population have been demonstrated may be particularly informative. The western …

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Mortalités Et Dépopulations Des Colonies D’Abeilles Domestiques : Le Cas Américain, Yves Le Conte, Marion D. Ellis Jan 2008

Mortalités Et Dépopulations Des Colonies D’Abeilles Domestiques : Le Cas Américain, Yves Le Conte, Marion D. Ellis

Department of Entomology: Faculty Publications

Après la France et l’Europe, l’Amérique du Nord subit des problèmes de mortalités massives d’abeilles. Un déficit d’abeilles pour la pollinisation et les résultats d’enquêtes auprès des apiculteurs attestent clairement que ce phénomène est très préoccupant pour l’apiculture américaine. Le déclin de ce pollinisateur peut constituer un problème environnemental grave pour les écosystèmes.

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A Technique To Morphologically Differentiate Larvae Of Diabrotica Virgifera Virgifera And D. Barberi (Coleoptera: Chrysomelidae), Sabine C. Becker, Lance J. Meinke Jan 2008

A Technique To Morphologically Differentiate Larvae Of Diabrotica Virgifera Virgifera And D. Barberi (Coleoptera: Chrysomelidae), Sabine C. Becker, Lance J. Meinke

Department of Entomology: Faculty Publications

The western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte and northern corn rootworm (NCR) Diabrotica barberi Smith are key pests of corn in the north-central United States (Chiang, 1973; Levine and Oloumi-Sadeghi, 1991). Both species are commonly found as larvae in the same cornfields in areas where geographic distributions overlap. Attempts to distinguish larvae of each species using external characters have proven to be difficult. Mendoza and Peters (1964) reported that differences in anal plate (pygidial shield) morphology could be used to separate larvae of each species. The WCR generally has a notched, dark brown anal plate whereas the anal …

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Use Of Spectral Vegetation Indices Derived From Airborne Hyperspectral Imagery For Detection Of European Corn Borer Infestation In Iowa Corn Plots, Matthew W. Carroll, John A. Glaser, Richard L. Hellmich, Thomas E. Hunt, Thomas W. Sappington, Dennis Calvin, Ken Copenhaver, Jon Fridgen Jan 2008

Use Of Spectral Vegetation Indices Derived From Airborne Hyperspectral Imagery For Detection Of European Corn Borer Infestation In Iowa Corn Plots, Matthew W. Carroll, John A. Glaser, Richard L. Hellmich, Thomas E. Hunt, Thomas W. Sappington, Dennis Calvin, Ken Copenhaver, Jon Fridgen

Department of Entomology: Faculty Publications

Eleven spectral vegetation indices that emphasize foliar plant pigments were calculated using airborne hyperspectral imagery and evaluated in 2004 and 2005 for their ability to detect experimental plots of corn manually inoculated with Ostrinia nubilalis (Hübner) neonate larvae. Manual inoculations were timed to simulate infestation of corn, Zea mays L., by first and second fiights of adult O. nubilalis. The ability of spectral vegetation indices to detect O. nubilalis-inoculated plots improved as the growing season progressed, with multiple spectral vegetation indices able to identify infested plots in late August and early September. Our findings also indicate that for …

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Agroecossistemas Orizícolas Irrigados: Insetos-Praga, Imimigos Naturais E Manejo Integrado, Leila Lucia Fritz, Elvis Arden Heinrichs, Marciele Pandolfo, Silvia Martins De Salles, Jaime Vargas De Oliveira, Lidia Mariana Fiuza Jan 2008

Agroecossistemas Orizícolas Irrigados: Insetos-Praga, Imimigos Naturais E Manejo Integrado, Leila Lucia Fritz, Elvis Arden Heinrichs, Marciele Pandolfo, Silvia Martins De Salles, Jaime Vargas De Oliveira, Lidia Mariana Fiuza

Department of Entomology: Faculty Publications

Nos ecossistemas de produção de arroz irrigado, os insetos-praga são considerados uma das limitações na produção mundial. Diante desse fato, diversas formas de controle vêm sendo pesquisadas para minimizar o problema. O uso contínuo de produtos fitossanitários ocasiona a resistência das pragas, além do aumento da população de pragas secundárais. Como alternativa, o uso do controle biológico, através de inimigos naturais, como predadores, parasitóides e patógenos, se revela capaz de regular as pragas em seu ambiente natural, reduzindo a densidade das populações e conseqüentemente os danos às plantas hospedeiras. Sendo assim, nesse trabalho de revisão são apresentados dados sobre a …

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Comparison And Validation Of Methods To Quantify Cry1ab Toxin From Bacillus Thuringiensis For Standardization Of Insect Bioassays, Andre L. B. Crespo, Terrence A. Spencer, Emily Nekl, Marianne Pusztai-Carey, William J. Moar, Blair D. Siegfried Jan 2008

Comparison And Validation Of Methods To Quantify Cry1ab Toxin From Bacillus Thuringiensis For Standardization Of Insect Bioassays, Andre L. B. Crespo, Terrence A. Spencer, Emily Nekl, Marianne Pusztai-Carey, William J. Moar, Blair D. Siegfried

Department of Entomology: Faculty Publications

Standardization of toxin preparations derived from Bacillus thuringiensis (Berliner) used in laboratory bioassays is critical for accurately assessing possible changes in the susceptibility of field populations of target pests. Different methods were evaluated to quantify Cry1Ab, the toxin expressed by 80% of the commercially available transgenic maize that targets the European corn borer, Ostrinia nubilalis (Hubner). We compared three methods of quantification on three different toxin preparations from independent sources: enzyme-linked immunosorbent assay (ELISA), sodium dodecyl sulfate-polyacrylamide gel electrophoresis and densitometry (SDS-PAGE/densitometry), and the Bradford assay for total protein. The results were compared to those obtained by immunoblot analysis and …

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Effects Of The Synergist S,S,S-Tributyl Phosphorotrithioate On Indoxacarb Toxicity And Metabolism In The European Corn Borer, Ostrinia Nubilalis (Hübner), Analiza P. Alves, William J. Allgeier, Blair D. Siegfried Jan 2008

Effects Of The Synergist S,S,S-Tributyl Phosphorotrithioate On Indoxacarb Toxicity And Metabolism In The European Corn Borer, Ostrinia Nubilalis (Hübner), Analiza P. Alves, William J. Allgeier, Blair D. Siegfried

Department of Entomology: Faculty Publications

The toxicity of the oxadiazine insecticide indoxacarb to the European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae), was evaluated in the presence and absence of S,S,S-tributyl phosphorotrithioate (DEF), an inhibitor of hydrolytic metabolism. Bioassays involving topical application of different concentrations of indoxacarb to third instars of a susceptible O. nubilalis laboratory strain were performed, and in vitro metabolism experiments involving [14C] indoxacarb were examined to determine the role of hydrolytic metabolism in indoxacarb activation. Indoxacarb toxicity decreased in the presence of DEF indicating antagonism of toxicity. Results of in vivo and in vitro inhibition experiments indicated a …

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Predation Of The Chinch Bug, Blissus Occiduus Barber (Hemiptera: Blissidae) By Geocoris Uliginosus (Say) (Hemiptera: Lygaeidae), J. D. Carstens, Frederick P. Baxendale, Tiffany Heng-Moss, Robert J. Wright Jan 2008

Predation Of The Chinch Bug, Blissus Occiduus Barber (Hemiptera: Blissidae) By Geocoris Uliginosus (Say) (Hemiptera: Lygaeidae), J. D. Carstens, Frederick P. Baxendale, Tiffany Heng-Moss, Robert J. Wright

Department of Entomology: Faculty Publications

Big-eyed bugs have been well documented as predators on a diverse group of arthropod prey in turfgrasses; however, little is known about the big-eyed bug species associated with buffalograss, or their feeding habits relative to the western chinch bug, Blissus occiduus Barber. This research documented that Geocoris uliginosus (Say) was the predominant big-eyed bug species associated with buffalograss, obtained information on its feeding behavior, and characterized predation rates. Laboratory studies documented G. uliginosus, as a predator of B. occiduus. While all life stages of B. occiduus were attacked by G. uliginosus, predation was greater on 1st through …

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A Synopsis Of Nebraska Grasshopper Distributions, Mathew L. Brust, William Wyatt Hoback, Robert J. Wright Jan 2008

A Synopsis Of Nebraska Grasshopper Distributions, Mathew L. Brust, William Wyatt Hoback, Robert J. Wright

Department of Entomology: Faculty Publications

Between 2005 and 2007, 656 new county records and eight new state records were obtained for Nebraska’s short-horned grasshoppers (Acrididae and Romaleidae). This represents an increase of 30% in the known grasshopper county records in Nebraska. Based on the large number of new distribution records, it appears that the previous distributions of Nebraska’s grasshoppers greatly underestimated the actual distributions. The new grasshopper state records were: Boopedon gracile, Chloealtis abdominalis, Encoptolophus subgracilis, Melanoplus bispinosus, Melanoplus borealis, Melanoplus punctulatus, Paratylotropidia brunneri, and Psinidia fenestralis were obtained. These new records will aid in both grasshopper monitoring for pest outbreaks and in conservation of …

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Bee-To-Bee Contact Drives Oxalic Acid Distribution In Honey Bee Colonies, Nicholas P. Aliano, Marion D. Ellis Jan 2008

Bee-To-Bee Contact Drives Oxalic Acid Distribution In Honey Bee Colonies, Nicholas P. Aliano, Marion D. Ellis

Department of Entomology: Faculty Publications

Nine divided hives were constructed to study the distribution of oxalic acid (OA). Experimental colonies were split into two equal, queenright sections with one of three divider types. The first divider allowed trophallaxis to occur between adult bees on each side, but did not allow bee-to-bee contact. The second divider did not allow trophallaxis or bee-to-bee contact. The third divider allowed both bee-to-bee contact and trophallaxis between the two sides. All three dividers allowed gas exchange of volatile materials. The objective was to investigate factors that contribute to the distribution of OA in a hive by monitoring Varroa destructor mortality. …

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Mortalités Et Dépopulations Des Colonies D’Abeilles Aux États-Unis, Marion D. Ellis, Yves Leconte Jan 2008

Mortalités Et Dépopulations Des Colonies D’Abeilles Aux États-Unis, Marion D. Ellis, Yves Leconte

Department of Entomology: Faculty Publications

Après la France et l’Europe, les États-Unis d’Amérique subissent de plein fouet les problèmes de mortalités massives d’abeilles. Un déficit d’abeilles disponibles pour la pollinisation et les résultats d’enquêtes auprès des apiculteurs attestent clairement ce phénomène très préoccupant pour l’apiculture américaine. Y a-t-il des analogies avec ce que nous avons vécu sur nos populations d’abeilles ou bien est-ce un phénomène différent ? L’état américain débloque des fonds importants pour expliquer et lutter contre ce syndrome qui détruit leur cheptel.

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Simulations With Elaborated Worked Example Modeling: Beneficial Effects On Schema Acquisition, Debra K. Meier, Karl J. Reinhard, David O. Carter, David W. Brooks Jan 2008

Simulations With Elaborated Worked Example Modeling: Beneficial Effects On Schema Acquisition, Debra K. Meier, Karl J. Reinhard, David O. Carter, David W. Brooks

Department of Entomology: Faculty Publications

Worked examples have been effective in enhancing learning outcomes, especially with novice learners. Most of this research has been conducted in laboratory settings. This study examined the impact of embedding elaborated worked example modeling in a computer simulation practice activity on learning achievement among 39 undergraduate students within a classroom environment. The students from one introductory forensic science course were randomly assigned to one of two groups that worked through computer-based simulations containing worked example modeling conditions presented in varied order. The computer software administered the modeled simulations, prior knowledge test, pretest, posttests, and a second domain test. Findings from …

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Using Banded Sunflower Moth (Lepidoptera: Tortricidae) Egg Density To Estimate Damage And Economic Distance In Oilseed Sunflower, Kirk D. Mundal, Gary J. Brewer Jan 2008

Using Banded Sunflower Moth (Lepidoptera: Tortricidae) Egg Density To Estimate Damage And Economic Distance In Oilseed Sunflower, Kirk D. Mundal, Gary J. Brewer

Department of Entomology: Faculty Publications

The banded sunflower moth, Cochylis hospes Walsingham (Lepidoptera: Tortricidae), is an important economic pest of sunflower in the Upper Great Plains of North America. Economic losses due to reductions in seed number, weight, and quality can be significant. Previously, the potential for economic losses were estimated by sampling for adult moths. However, sampling for moths can be difficult and inaccurate. An alternative is to sample for banded sunflower moth eggs, which can be accurately counted in the field by using a binocular 3.5 headband magnifier. The egg counts are used to calculate the economic injury level (EIL): EIL …

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Levels Of Tolerance, Antibiosis, And Antixenosis Among Resistant Buffalograsses And Zoysiagrasses, Thomas E. Eickhoff, Tiffany Heng-Moss, Frederick P. Baxendale, John E. Foster Jan 2008

Levels Of Tolerance, Antibiosis, And Antixenosis Among Resistant Buffalograsses And Zoysiagrasses, Thomas E. Eickhoff, Tiffany Heng-Moss, Frederick P. Baxendale, John E. Foster

Department of Entomology: Faculty Publications

The western chinch bug, Blissus occiduus Barber, has been documented as one of the most serious pests of buffalograss, Buchloë dactyloides (Nuttall) Engelmann, and zoysiagrass, Zoysia japonica Steudel, grown for turf in midwestern states. Resistance to the western chinch bug has been identified in both buffalograsses and zoysiagrasses. Choice and no-choice studies were conducted to determine the categories (antibiosis, antixenosis, and tolerance) of three resistant buffalograsses (PX3-5-1’, 196’, and 184’) and three resistant zoysiagrasses (El Toro, Emerald, and Zorro). Antibiosis studies found no significant differences in survival, nymphal development, or fecundity among the resistant and susceptible buffalograsses or zoysiagrasses, …

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