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Articles 6931 - 6960 of 11444

Full-Text Articles in Entomology

History, Distribution, And Identification Of Exoteleia Dodecella (L.) (Lepidoptera: Gelechiidae) In North America, With Insights Into The Systematics Of Exoteleia Wallengren Using Characters Of The Adult, Immatures, Bionomics, And Dna Barcodes, David Adamski, Jean-Francois Landry, Steven C. Passoa, Robert Tracy Jan 2010

History, Distribution, And Identification Of Exoteleia Dodecella (L.) (Lepidoptera: Gelechiidae) In North America, With Insights Into The Systematics Of Exoteleia Wallengren Using Characters Of The Adult, Immatures, Bionomics, And Dna Barcodes, David Adamski, Jean-Francois Landry, Steven C. Passoa, Robert Tracy

USDA Systematic Entomology Laboratory

Exoteleia dodecella (L.) (Lepidoptera: Gelechiidae), a native of Europe, was first documented from North America at several locations in eastern Canada. Additional records indicate this moth has now spread throughout New England and west to northern Pennsylvania, New York, and possibly into Michigan in the United States. A second introduction of E. dodecella has occurred near the Vancouver area of British Columbia in Canada. To help with the identification of E. dodecella, morphological, biological, and molecular evidence are presented. Key features of the adult, larval, and pupal morphology are compared to other species of Exoteleia and illustrated with line …

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A Review Of African Blastobasinae (Lepidoptera: Gelechioidea: Coleophoridae), With New Taxa Reared From Native Fruits In Kenya, David Adamski, Robert S. Copeland, Scott E. Miller, Paul D. N. Hebert, Karolyn Darrow, Quentin Luke Jan 2010

A Review Of African Blastobasinae (Lepidoptera: Gelechioidea: Coleophoridae), With New Taxa Reared From Native Fruits In Kenya, David Adamski, Robert S. Copeland, Scott E. Miller, Paul D. N. Hebert, Karolyn Darrow, Quentin Luke

USDA Systematic Entomology Laboratory

Twenty-five species of African Blastobasinae (Lepidoptera: Coleophoridae) are reviewed; 12 species are redescribed, and 13 species are described as new. Rearing of Lepidoptera ancillary to sampling efforts targeted for fruit flies (Diptera: Tephritidae) and their parasitoids was conducted in and near forested areas in coastal, central highland, and western highland habitats in Kenya. Reared moths were associated with fruits of 64 plant species in 34 families. Two new species, Blastobasis millicentae and Neoblastobasis perisella, were discovered in mixed original type series of species described by Meyrick and also reared from fruit. Eight new species, Blastobasis acirfa, B. aynekiella, …

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Host Recognition And Acceptance Behaviour In Cotesia Sesamiae And C. Flavipes (Hymenoptera: Braconidae), Parasitoids Of Gramineous Stemborers In Africa, Meshack Obonyo, Fritz Schulthess, Bruno Le Ru, Johnnie Van Den Berg, Paul André Calatayud Jan 2010

Host Recognition And Acceptance Behaviour In Cotesia Sesamiae And C. Flavipes (Hymenoptera: Braconidae), Parasitoids Of Gramineous Stemborers In Africa, Meshack Obonyo, Fritz Schulthess, Bruno Le Ru, Johnnie Van Den Berg, Paul André Calatayud

All Peer-Reviewed Publications

The host recognition and acceptance behaviour of two braconid larval parasitoids (Cotesia sesamiae and C. flavipes) were studied using natural stemborer hosts (i.e., the noctuid Busseola fusca for C. sesamiae, and the crambid Chilo partellus for C. flavipes) and a non-host (the pyralid Eldana saccharina). A single larva was introduced into an arena together with a female parasitoid and the behaviour of the wasp recorded until it either stung the larva or for a maximum of 5 min if it did not sting the larva. There was a clear hierarchy of behavioural steps, which was similar for both parasitoid species. …

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Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 11 2010, Several Authors Jan 2010

Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 11 2010, Several Authors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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Niche Specialization And Conservation Biology Of Cicindela Nevadica Lincolniana, Tierney R. Brosius Jan 2010

Niche Specialization And Conservation Biology Of Cicindela Nevadica Lincolniana, Tierney R. Brosius

Department of Entomology: Dissertations, Theses, and Student Research

As with many organisms across the globe, Cicindela nevadica lincolniana is threatened with extinction. Understanding ecological factors that contribute to extinction vulnerability and what methods aid in the recovery of those species is essential in developing successful conservation programs. Here we examine behavioral mechanisms for niche partitioning along with improving techniques for captive rearing protocol and increasing public awareness about the conservation of this local insect. Ovipositional selectivity was examined for Cicindela nevadica lincolniana, Cicindela circumpicta, Cicindela togata, Cicindela punctulata, and Cicindela fulgida. Models reflect that these species of co-occurring tiger beetles select different ranges of salinity in which to …

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Nestmate Recognition And The Role Of Cuticular Hydrocarbons In The African Termite Raiding Ant Pachycondyla Analis, Abdullahi A. Yusuf, Christian W.W. Pirk, Robin M. Crewe, Peter G.N. Njagi, Ian Gordon, Baldwyn Torto Jan 2010

Nestmate Recognition And The Role Of Cuticular Hydrocarbons In The African Termite Raiding Ant Pachycondyla Analis, Abdullahi A. Yusuf, Christian W.W. Pirk, Robin M. Crewe, Peter G.N. Njagi, Ian Gordon, Baldwyn Torto

All Peer-Reviewed Publications

Cuticular hydrocarbons (CHCs) are used for chemical communication among nestmates in many ant species, and they may play a role in the discrimination of nestmates and non-nestmates. Using the mandible opening response (MOR) bioassay, we tested the response of the African termite raiding ant, Pachycondyla analis, to CHC extracts of nestmates and non-nestmates. The ants were able to distinguish control chemical cues, from nestmate CHCs, and from non-nestmate CHCs, and, based on a CHC recognition threshold, aggression was demonstrated toward non-nestmates. Gas chromatography (GC) and GC-mass spectrometric analyses showed that CHC components of different ant colonies had chain lengths ranging …

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Environmental Correlates Of Abundances Of Mosquito Species And Stages In Discarded Vehicle Tires, Donald A. Yee, Jamie M. Kneitel, Steven A. Juliano Jan 2010

Environmental Correlates Of Abundances Of Mosquito Species And Stages In Discarded Vehicle Tires, Donald A. Yee, Jamie M. Kneitel, Steven A. Juliano

Faculty Publications – Biological Sciences

Discarded vehicle tires are a common habitat for container mosquito larvae, although the environmental factors that may control their presence or abundance within a tire are largely unknown. We sample discarded vehicle tires in six sites located within four counties of central Illinois during the spring and summer of 2006 to determine associations between a suite of environmental factors and community composition of container mosquitoes. Our goal was to find patterns of association between environmental factors and abundances of early and late instars. We hypothesized that environmental factors correlated with early instars would be indicative of oviposition cues, whereas environmental …

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Environmental Correlates Of Abundances Of Mosquito Species And Stages In Discarded Vehicle Tires, Donald A. Yee, Jamie M. Kneitel, Steven A. Juliano Jan 2010

Environmental Correlates Of Abundances Of Mosquito Species And Stages In Discarded Vehicle Tires, Donald A. Yee, Jamie M. Kneitel, Steven A. Juliano

Faculty Publications

Discarded vehicle tires are a common habitat for container mosquito larvae, although the environmental factors that may control their presence or abundance within a tire are largely unknown. We sampled discarded vehicle tires in six sites located within four counties of central Illinois during the spring and summer of 2006 to determine associations between a suite of environmental factors and community composition of container mosquitoes. Our goal was to find patterns of association between environmental factors and abundances of early and late instars. We hypothesized that environmental factors correlated with early instars would be indicative of oviposition cues, whereas environmental …

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Quantifying Tarnished Plant Bug, Lygus Lineolaris (Palisot De Beauvois), Resistance To Acephate In Louisiana, Josh T. Copes Jan 2010

Quantifying Tarnished Plant Bug, Lygus Lineolaris (Palisot De Beauvois), Resistance To Acephate In Louisiana, Josh T. Copes

LSU Master's Theses

The tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), is one of the most yield- limiting insect pests attacking cotton in the Mid-Southern region of the U.S. This pest is almost exclusively managed with chemical control strategies. The organophosphate insecticide, acephate, has been one of the most important insecticides recommended to control tarnished plant bugs. In recent years, reports of unsatisfactory acephate performance have become common and actual field rates have been increased to improve control. The objective of this study was to survey acephate susceptibility in Louisiana populations of tarnished plant bug using laboratory bioassays and evaluate acephate efficacy …

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Association Of Esterases In Resistance To Naled And Resmethrin In The Southern House Mosquito, Culex Quinquefasciatus, Jennifer R. Gordon Jan 2010

Association Of Esterases In Resistance To Naled And Resmethrin In The Southern House Mosquito, Culex Quinquefasciatus, Jennifer R. Gordon

LSU Master's Theses

The vector-competency and its affinity for humans make C. quinquefasciatus an important target of mosquito abatement programs. Whenever such control programs are implemented, protocols to monitor frequencies and mechanisms of resistance to the insecticides used are necessary to optimize the efficacy of the management strategy and to slow development of resistance to the insecticides used. In the current study, susceptibilities to the two adulticides used by EBRMARC (naled and resmethrin) were monitored using field-collected mosquitoes and a topical and contact bioassay, respectively. My hypothesis was that esterase-mediated enhanced metabolism conferred resistance to both insecticides in populations of C. quinquefasciatus from …

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Symptoms, Distribution And Abundance Of The Stem-Boring Caterpillar, Blastobasis Repartella (Dietz), In Switchgrass, Jarrad R. Prasifka, Jeffrey D. Bradshaw, Arvid A. Boe, Dokyoung Lee, David Adamski, Michael E. Gray Jan 2010

Symptoms, Distribution And Abundance Of The Stem-Boring Caterpillar, Blastobasis Repartella (Dietz), In Switchgrass, Jarrad R. Prasifka, Jeffrey D. Bradshaw, Arvid A. Boe, Dokyoung Lee, David Adamski, Michael E. Gray

Agronomy, Horticulture and Plant Science Faculty Publications

A potential pest of switchgrass, Panicum virgatum L., was first detected in South Dakota in 2004, where death of partially emerged leaves was noted in a small proportion of tillers. Similar “dead heart” symptoms were observed in switchgrass in Illinois during 2008 and adults of a stem-boring caterpillar were collected and identified as Blastobasis repartella (Dietz). In 2009, a survey of the central United States was used to estimate the distribution and abundance of this insect. In eight northern states, B. repartella was consistently found in both cultivated plots and natural stands of switchgrass. In four southern states, B. repartella …

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Toxicity Interaction Of Fipronil And Imidacloprid Against Coptotermes Formasanus, Pan Luo Jan 2010

Toxicity Interaction Of Fipronil And Imidacloprid Against Coptotermes Formasanus, Pan Luo

LSU Master's Theses

The Formosan subterranean termite, Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae), is considered one of the most destructive structural pests in the world, especially in warm and humid areas. Insecticide application is an effective strategy in termite control. In recent years, non-repellent insecticides have become popular for their high efficacy due to delayed toxicity and horizontal transfer. Fipronil (registered name Termidor®) and imidacloprid (registered name Premise®) have been applied to the perimeter of millions of houses in the United States. Fipronil and imidacloprid have different modes of action which may produce a synergistic effect when combined. There have been no studies on …

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Presence Of The Asian Tiger Mosquito (Aedes Albopictus) In Northwest Arkansas, J. Wilson, David H. Jamieson Jan 2010

Presence Of The Asian Tiger Mosquito (Aedes Albopictus) In Northwest Arkansas, J. Wilson, David H. Jamieson

Journal of the Arkansas Academy of Science

No abstract provided.

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Ecology Of Mayfly (Insecta : Ephemeroptera) Nymphs In Three Streams Of Ulu Gombak Forest Reserve, Peninsular Malaysia., Sree Gayathree Selvantharan Jan 2010

Ecology Of Mayfly (Insecta : Ephemeroptera) Nymphs In Three Streams Of Ulu Gombak Forest Reserve, Peninsular Malaysia., Sree Gayathree Selvantharan

Student Works (2010-2019)

Three sampling stations with various environmental quality gradients in Ulu Gombak Forest Reserve, Selangor, Peninsular Malaysia were selected in this study: Sungai Gombak, Anak Sungai Gombak and Sungai Batu 19. A total of six genera of ephemeropteran nymphs were found from the mentioned streams: Baetis sp. (Baetidae) (232), Thalerosphyrus sp. (Heptageniidae) (925), Campsoneuria sp. (Heptageniidae) (1432), Neurocaenis sp. (Tricorythidae) (471), Platybaetis sp. (Baetidae) (12) and Prosopistoma sp. (Prosopistomatidae) (1). The most dominant family of ephemeropteran nymphs is Heptageniidae while Neurocaenis sp. (Tricorythidae) were the only nymphs that showed significant difference in abundance between all three streams (p=0.05) using student t-test. …

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Categorizing The Resistance Of Soybean Genotypes To The Soybean Aphid (Hemiptera: Aphididae), L. M. Pierson, Tiffany Heng-Moss, Thomas E. Hunt, J. C. Reese Jan 2010

Categorizing The Resistance Of Soybean Genotypes To The Soybean Aphid (Hemiptera: Aphididae), L. M. Pierson, Tiffany Heng-Moss, Thomas E. Hunt, J. C. Reese

Department of Entomology: Faculty Publications

We evaluated selected soybean, Glycine max (L.) Merr., genotypes during their reproductive stages for resistance to the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), under greenhouse conditions and documented the categories of aphid-resistant soybean. Two screening studies were performed to assess the level of resistance to the soybean aphid on six soybean genotypes during the reproductive stages of development. Significant differences in aphid damage ratings were detected among the soybean evaluated in the screening studies. Three genotypes (KS4202, K-1639-2, and K1621) were considered moderately resistant based on the assessed damage ratings. Two of these genotypes (K-1639-2 and KS4202), along with …

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Biotic And Abiotic Influences On Within-Plant Distribution Of Soybean Aphid (Hemiptera: Aphididae: Aphis Glycines), Tierney R. Brosius, Leon G. Higley, Thomas E. Hunt Jan 2010

Biotic And Abiotic Influences On Within-Plant Distribution Of Soybean Aphid (Hemiptera: Aphididae: Aphis Glycines), Tierney R. Brosius, Leon G. Higley, Thomas E. Hunt

Department of Entomology: Faculty Publications

The within-plant distribution of soybean aphid, Aphis glycines Matsumura has been attributed to various causes, yet it is unclear which factor or combination of factors most influence aphid within-plant distribution. Understanding soybean aphid distribution within the soybean canopy is important both in developing sampling programs and in evaluating injury. Because natural enemies have the potential to alter aphid dispersion, we examined how within-plant distribution of soybean aphid was influenced by different natural enemies. Field cages of different mesh diameters were used to exclude different sizes of natural enemies from aphid infested plots. Plots were surveyed and both natural enemy density …

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The Prospects For Sequencing The Western Corn Rootworm Genome, Nicholas Miller, S. Richards, T. W. Sappington Jan 2010

The Prospects For Sequencing The Western Corn Rootworm Genome, Nicholas Miller, S. Richards, T. W. Sappington

Department of Entomology: Faculty Publications

Historically, obtaining the complete sequence of eukaryotic genomes has been an expensive and complex task. For this reason, efforts to sequence insect genomes have largely been confined to model organisms, species that are important to human health and representative species from a few insect orders. This situation is set to change as a number of ‘next generation’ sequencing technologies are making largescale DNA sequencing both affordable and accessible. Sequencing the genome of the western corn rootworm, Diabrotica virgifera virgifera, is likely to become a realistic proposition within the next 2 years. In the meantime, there is an active community …

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Morphological And Genetic Analyses In The Melanoplus Packardii Group (Orthoptera: Acrididae), Mathew L. Brust, Erica J. Lindroth, W. Wyatt Hoback, Robert Wright, Kathryn J. Hanford, John E. Foster Jan 2010

Morphological And Genetic Analyses In The Melanoplus Packardii Group (Orthoptera: Acrididae), Mathew L. Brust, Erica J. Lindroth, W. Wyatt Hoback, Robert Wright, Kathryn J. Hanford, John E. Foster

Department of Entomology: Faculty Publications

Melanoplus packardii Scudder was described in 1897. Three additional closely-related species were later described and their status as species has been questioned on numerous occasions. We examined morphology from specimens collected in Nebraska which fit descriptions of three of the four forms and specimens that appeared to be hybrids. We found distinct morphological characters suggesting species status for M. foedus and M. packardii, but not for M. foedus fluviatilis. Examination of aedeagi of these three forms suggests that M. foedus and M. packardii are each distinct, but that the aedeagi of M. f. fluviatilis and M. f. foedus cannot …

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Varroa Mites And Honey Bee Health: Can Varroa Explain Part Of The Colony Losses?, Yves Le Conte, Marion D. Ellis, Wolfgang Ritter Jan 2010

Varroa Mites And Honey Bee Health: Can Varroa Explain Part Of The Colony Losses?, Yves Le Conte, Marion D. Ellis, Wolfgang Ritter

Department of Entomology: Faculty Publications

Since 2006, disastrous colony losses have been reported in Europe and North America. The causes of the losses were not readily apparent and have been attributed to overwintering mortalities and to a new phenomenon called Colony Collapse Disorder. Most scientists agree that there is no single explanation for the extensive colony losses but that interactions between different stresses are involved. As the presence of Varroa in each colony places an important pressure on bee health, we here address the question of how Varroa contributes to the recent surge in honey bee colony losses.

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Virulence Of Mexican Isolates Of Entomopathogenic Fungi (Hypocreales: Clavicipitaceae) Upon Rhipicephalus = Boophilus Microplus (Acari: Ixodidae) Larvae And The Efficacy Of Conidia Formulations To Reduce Larval Tick Density Under Field Conditions, César Andrés Ángel-Sahagún, Roberto Lezama-Gutiérrez, Jaime Molina-Ochoa, A. Pescador-Rubio, S. R. Skoda, C. Cruz-Vázquez, A. G. Lorenzoni, E. Galindo-Velasco, H. Fragoso-Sánchez, John E. Foster Jan 2010

Virulence Of Mexican Isolates Of Entomopathogenic Fungi (Hypocreales: Clavicipitaceae) Upon Rhipicephalus = Boophilus Microplus (Acari: Ixodidae) Larvae And The Efficacy Of Conidia Formulations To Reduce Larval Tick Density Under Field Conditions, César Andrés Ángel-Sahagún, Roberto Lezama-Gutiérrez, Jaime Molina-Ochoa, A. Pescador-Rubio, S. R. Skoda, C. Cruz-Vázquez, A. G. Lorenzoni, E. Galindo-Velasco, H. Fragoso-Sánchez, John E. Foster

Department of Entomology: Faculty Publications

The first objective was laboratory evaluation of the virulence of 53 Mexican isolates of fungi against larvae of Rhipicephalus (Boophilus) microplus. Thirty-three isolates of Metarhizium anisopliae var. anisopliae (Metschnickoff) Sorokin (Hypocreales: Clavicipitaceae) and 20 isolates of Isaria (Paecilomyces) fumosorosea (fumosoroseus) (Wize) (Eurotiales: Trichomaceae) were tested on 7-day-old larvae under laboratory conditions. Larvae were immersed in a suspension containing 108 conidia/mL and the CL50 values were estimated. Then, field tests were conducted to determine the efficacy of formulations of the isolate with the highest virulence. M. anisopliae (Ma 14 isolate) was formulated with four carriers: Tween, Celite, …

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Efficacies Of Habitat Management Techniques In Managing Maize Stem Borers In Ethiopia, Difabachew K. Belay, John E. Foster Jan 2010

Efficacies Of Habitat Management Techniques In Managing Maize Stem Borers In Ethiopia, Difabachew K. Belay, John E. Foster

Department of Entomology: Faculty Publications

Habitat management techniques to control maize stem borers were tested in eastern (Melkassa and Mieso) and western (Sibu-Sire) Ethiopia. These techniques consisted of using mixed cropping of maize with haricot beans at different maize:bean ratios and a ‘‘push–pull’’ (PP) strategy utilizing Napier grass as a trap plant around maize plots as the ‘‘pull’’ and Desmodium in between maize rows as a deterrent or ‘‘push’’. In Melkassa, pest infestations were too low for the cropping system to significantly affect pests, plant damage and yields while in Mieso, where the pest densities were high, intercropping of maize with beans at ratios of …

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Purification And Characterization Of Cytoplasmic Nadp+- Isocitrate Dehydrogenase, And Amplification Of The Nadp+-Idh Gene From The Wing-Dimorphic Sand Field Cricket, Gryllus Firmus, Anthony J. Zera, Susan Newman, David Berkheim, Christine Black, Lindsay Klug, Erica Crone Jan 2010

Purification And Characterization Of Cytoplasmic Nadp+- Isocitrate Dehydrogenase, And Amplification Of The Nadp+-Idh Gene From The Wing-Dimorphic Sand Field Cricket, Gryllus Firmus, Anthony J. Zera, Susan Newman, David Berkheim, Christine Black, Lindsay Klug, Erica Crone

School of Biological Sciences: Faculty Publications

Cytoplasmic NADP+-isocitrate dehydrogenase (NADP+-IDH) has been purified and characterized, and its gene sequenced in many animal, plant, and yeast species. However, much less information is available on this enzyme-gene in insects. As a first step in investigating the biochemical and molecular mechanisms by which NADP+-IDH contributes to adaptations for flight vs. reproduction in insects, the enzyme was purified to homogeneity in the wing-dimorphic cricket, Gryllus firmus, characterized, and its corresponding gene sequenced. Using a combination of polyethylene glycol precipitation, Cibacron-Blue affinity chromatography, and hydrophobic interaction chromatography the enzyme was purified 291-fold (7% yield; specific activity = 15.8 μmol NADPH/min/mg …

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Male Remating Success And The Frequency Of Copulatory Plugs In The Green Lynx Spider Peucetia Viridans (Araneae, Oxyopidae), Martina G. Ramirez, Angelik C. Achekian, Catherine R. Coverley, Rachel M. Pierce, Sarah S. Eiman, Melissa M. Wetkowski Jan 2010

Male Remating Success And The Frequency Of Copulatory Plugs In The Green Lynx Spider Peucetia Viridans (Araneae, Oxyopidae), Martina G. Ramirez, Angelik C. Achekian, Catherine R. Coverley, Rachel M. Pierce, Sarah S. Eiman, Melissa M. Wetkowski

Biology Faculty Works

Peucetia viridans males were allowed to mate with three virgin females and most matings resulted in live spiderlings, even when males lacked palpal paracymbial processes. Among females, the presence of copulatory plugs was inconsistent, and when present, their condition was not uniform; broken-off male paracymbia were often found in epigynal orifices. There was no size effect in a male’s ability to completely plug a female’s genital orifices, as well as no significant change in the pattern of plug production over consecutive mating trials. Among mated, field-collected females, the presence of plugs and paracymbia was variable, with females from some sites …

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Importance Of Contact Chemical Cues In Host Recognition And Acceptance By The Braconid Larval Endoparasitoids Cotesia Sesamiae And Cotesia Flavipes, Meshack Obonyo, Fritz Schulthess, Bruno Le Ru, Johnnie Van Den Berg, Jean François Silvain, Paul André Calatayud Jan 2010

Importance Of Contact Chemical Cues In Host Recognition And Acceptance By The Braconid Larval Endoparasitoids Cotesia Sesamiae And Cotesia Flavipes, Meshack Obonyo, Fritz Schulthess, Bruno Le Ru, Johnnie Van Den Berg, Jean François Silvain, Paul André Calatayud

All Peer-Reviewed Publications

The ability of the congeneric braconid parasitoids Cotesia sesamiae (Cameron) and Cotesia flavipes Cameron to discriminate between stemborer larval cues upon contact was studied using their natural hosts, namely the noctuid Busseola fusca (Fuller) and the crambid Chilo partellus (Swinhoe), respectively, and the pyralid non-host Eldana saccharina (Walker). When the natural host larvae were washed in distilled water, parasitoid behavior was similar to that displayed when in contact with E. saccharina, characterized by the absence of ovipositor insertion. When washed host or non-host larvae were bathed with water extracts of their natural host, the parasitoids showed a significant increase in …

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Expression Of Metallothionein And Α-Tubulin In Heavy Metal-Tolerant Anopheles Gambiae Sensu Stricto (Diptera: Culicidae), Paul O. Mireji, Joseph Keating, Ahmed Hassanali, Daniel E. Impoinvil, Charles M. Mbogo, Martha N. Muturi, Hudson Nyambaka, Eucharia U. Kenya, John I. Githure, John C. Beier Jan 2010

Expression Of Metallothionein And Α-Tubulin In Heavy Metal-Tolerant Anopheles Gambiae Sensu Stricto (Diptera: Culicidae), Paul O. Mireji, Joseph Keating, Ahmed Hassanali, Daniel E. Impoinvil, Charles M. Mbogo, Martha N. Muturi, Hudson Nyambaka, Eucharia U. Kenya, John I. Githure, John C. Beier

All Peer-Reviewed Publications

Anopheles mosquitoes have been shown to adapt to heavy metals in their natural habitats. In this study we explored the possibility of using Anopheles gambiae sensu stricto as bio-reporters for environmental heavy metal pollution through expressions of their metal-responsive metallothionein and α-tubulin genes. The study was undertaken with third instar larvae after selection by cadmium, copper, or lead at LC30 through five successive generations. Expression levels were determined in the 5th generation by semi-quantitative RT-PCR on the experimental and control populations. The data were analyzed using one-way ANOVA. The highest metallothionein (F3, 11=4.574, P=0.038) and α-tubulin (F3, 11=12.961, P=0.002) responses …

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Cockroaches, Ryan S. Davis Jan 2010

Cockroaches, Ryan S. Davis

All Current Publications

Cockroaches are one of the most difficult structural pests to eradicate because of their ability to hide, rapid reproduction, and resistance to and avoidance of many commonly used insecticide sprays and baits. Using an integrated pest management (IPM) program can greatly increase the possibility of successful control. There are 4 cockroach species that commonly infest structures in Utah, each with a specific biology; identify invading cockroaches before you develop an IPM plan. Proper identification of any pest will allow you to understand its biology, and use it against itself!

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Distribution Of Eastern Hemlock, Tsuga Canadensis, In Eastern Kentucky And The Susceptibility To Invasion By The Hemlock Woolly Adelgid, Adelges Tsugae, Joshua Taylor Clark Jan 2010

Distribution Of Eastern Hemlock, Tsuga Canadensis, In Eastern Kentucky And The Susceptibility To Invasion By The Hemlock Woolly Adelgid, Adelges Tsugae, Joshua Taylor Clark

University of Kentucky Master's Theses

The hemlock woolly adelgid, an invasive non-native insect, is threatening eastern hemlock in Kentucky. This study examined three techniques to map the distribution of eastern hemlock using decision trees, remote sensing, and species distribution modeling. Accuracy assessments showed that eastern hemlock was best modeled using a decision tree without incorporating satellite radiance. Using the distribution from the optimal model, risk maps for susceptibility to hemlock woolly adelgid infestation were created using two species distribution models. Environmental variables related to dispersal were used to build the models and their contributions to the models assessed. The models showed similar spatial distributions of …

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Morphology And Systematics Of Braconid Wasps, Charles Andrew Boring Jan 2010

Morphology And Systematics Of Braconid Wasps, Charles Andrew Boring

University of Kentucky Doctoral Dissertations

The following morphological structures of the ovipositor of Homolobus truncator (Say) (Hymenoptera : Braconidae) are described and hypotheses of their functions are proposed: a series of sharp ridges on the distal surface of the notch helps maintain a grip on the inner surface of the host cuticle; the sperone directs eggs away from the inner surface of the ventral valves; a flap-like structure on each ventral valve covers the portal through which eggs pass; the valvillus maintains position of the egg within the ovipositor and acts against the egg to force it out; ctenidia on the inner surface of the …

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Impact Of Dietary Diversification On Invasive Slugs And Biological Control With Notes On Slug Species Of Kentucky, Anna K. Thomas Jan 2010

Impact Of Dietary Diversification On Invasive Slugs And Biological Control With Notes On Slug Species Of Kentucky, Anna K. Thomas

University of Kentucky Master's Theses

Increasing introductions of non-native terrestrial slugs (Mollusca: Gastropoda) are a concern to North American regulatory agencies as these generalists impact the yield and reduce the aesthetic value of crop plants. Understanding how the increase in diversification in North American cropping systems affects non-native gastropods and finding effective biological control options are imperative for pest management; however, little research has been done in this area. This study tested the hypothesis that dietary diversification affects the biological control capacity of a generalist predator and allows the slug pest Deroceras reticulatum (Müller) (Stylommatophora: Agriolimacidae) to more effectively fulfill its nutritional requirements. Results showed …

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Creating An Interactive And Dichotomous Key To The World Subfamilies Of Braconidae, Kacie Jo Johansen Jan 2010

Creating An Interactive And Dichotomous Key To The World Subfamilies Of Braconidae, Kacie Jo Johansen

University of Kentucky Master's Theses

Members of Braconidae (Hymenoptera: Ichneumonoidea) are mostly parasitoids of other holometabolous insects. It is a large family with a little over 18,000 described species and many more to be described. Subfamily classification in this group has been unstable and resolution of phylogenetic history at the subfamily level has been problematic. Since 1993, no new keys to the subfamilies of Braconidae have been produced. Many taxonomic and phylogenetic changes have taken place since then, including a recent phylogeny proposing 47 subfamilies and representing the most robust and resolved analysis to date. A pressing need for new keys to the world subfamilies …

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