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Articles 181 - 192 of 192
Full-Text Articles in Entomology
Comparative Binding Of Cry1ab And Cry1f Bacillus Thuringiensis Toxins To Brush Border Membrane Proteins From Ostrinia Nubilalis, Ostrinia Furnacalis And Diatraea Saccharalis (Lepidoptera: Crambidae) Midgut Tissue, Sek Yee Tan, Bonifacio F. Cayabyab, Edwin P. Alcantara, Fangneng Huang, Kanglai He, Kenneth Nickerson, Blair Siegfried
Comparative Binding Of Cry1ab And Cry1f Bacillus Thuringiensis Toxins To Brush Border Membrane Proteins From Ostrinia Nubilalis, Ostrinia Furnacalis And Diatraea Saccharalis (Lepidoptera: Crambidae) Midgut Tissue, Sek Yee Tan, Bonifacio F. Cayabyab, Edwin P. Alcantara, Fangneng Huang, Kanglai He, Kenneth Nickerson, Blair Siegfried
Department of Entomology: Faculty Publications
The European (Ostrinia nubilalis Hübner) and Asian corn borers (Ostrinia furnacalis Guenée) are closely related and display similar sensitivity to Cry1 toxins. In this study, we compared the binding patterns of Cry1Ab and Cry1F toxins between both Ostrinia spp., as well as the expression of putative cadherin and aminopeptidase-N (APN)-like protein receptors. Additionally, cDNA sequences of these putative toxin receptors from both Ostrinia species were compared. Ligand blots for both species indicated a similar binding pattern for Cry1Ab with the strongest immunoreactive band at 260 kDa in both species. In addition, similar expression of the putative cadherin- and …
Female Mate Choice For Multimodal Courtship And The Importance Of The Signaling Background For Selection On Male Ornamentation, Jay A. Stafstrom, Eileen A. Hebets
Female Mate Choice For Multimodal Courtship And The Importance Of The Signaling Background For Selection On Male Ornamentation, Jay A. Stafstrom, Eileen A. Hebets
Eileen Hebets Publications
Conspicuous visual ornaments are frequently incorporated into complex courtship displays that integrate signal components from multiple sensory modalities. Mature male Schizocosa crassipes (Walckenaer, 1837) wolf spiders wave, arch, and tap their ornamented forelegs in a visual courtship display that simultaneously incorporates seismic components. To determine the importance of modality-specific signal components in female mate choice, we used a signal ablation design and compared the mating frequency of female-male pairs across signaling environments with manipulated modality-specific transmission properties. We found that the successful transmission of isolated visual or seismic signaling was sufficient for mating success; neither signaling modality was necessary. Additionally, …
Diversification Under Sexual Selection: The Relative Roles Of Mate Preference Strength And The Degree Of Divergence In Mate Preferences, Rafael L. Rodríguez, Janette W. Boughman, David A. Gray, Eileen A. Hebets, Gerlinde Höbel, Laurel B. Symes
Diversification Under Sexual Selection: The Relative Roles Of Mate Preference Strength And The Degree Of Divergence In Mate Preferences, Rafael L. Rodríguez, Janette W. Boughman, David A. Gray, Eileen A. Hebets, Gerlinde Höbel, Laurel B. Symes
Eileen Hebets Publications
The contribution of sexual selection to diversification remains poorly understood after decades of research. This may be in part because studies have focused predominantly on the strength of sexual selection, which offers an incomplete view of selection regimes. By contrast, students of natural selection focus on environmental differences that help compare selection regimes across populations. To ask how this disparity in focus may affect the conclusions of evolutionary research, we relate the amount of diversification in mating displays to quantitative descriptions of the strength and the amount of divergence in mate preferences across a diverse set of case studies of …
Evaluation And Monitoring Of Ash (Fraxinus Spp.) Tolerant To Long-Term Emerald Ash Borer (Agrilus Planipennis [Coleoptera: Buprestidae]) Exposure, Kathryn G. Hietala
Evaluation And Monitoring Of Ash (Fraxinus Spp.) Tolerant To Long-Term Emerald Ash Borer (Agrilus Planipennis [Coleoptera: Buprestidae]) Exposure, Kathryn G. Hietala
Dissertations, Master's Theses and Master's Reports - Open
Invasive insects that successfully establish in introduced areas can significantly alter natural communities. These pests require specific establishment criteria (e.g. host suitability) that, when known, can help quantify potential damage to infested areas. Emerald ash borer (Agrilus planipennis [Coleoptera: Buprestidae]) is an invasive phloem-feeding pest which is responsible for the death of millions of ash trees (Fraxinus spp. L.). Over 200 surviving ash trees were previously identified in the Huron-Clinton Metroparks located in southeast Michigan. Trees were assessed over a four year period and a hierarchical cluster analysis was performed on dieback, vigor, and presence of signs and …
Comparison Of Volatile Blends And Nucleotide Sequences Of Two Beauveria Bassiana Isolates Of Different Virulence And Repellency Towards The Termite Macrotermes Michealseni, D. M. Mburu, N. K. Maniania, A. Hassanali
Comparison Of Volatile Blends And Nucleotide Sequences Of Two Beauveria Bassiana Isolates Of Different Virulence And Repellency Towards The Termite Macrotermes Michealseni, D. M. Mburu, N. K. Maniania, A. Hassanali
All Peer-Reviewed Publications
Isolates of the fungus Beauveria bassiana have different levels of virulence and repellency against the termite Macrotermes michaelseni. In the present study, we compared the volatile profiles and gene sequences of two isolates of the fungus with different levels of virulence and repellence to the termite. Gas chromatography-mass spectrometric analyses showed quantitative and qualitative differences in the composition of volatiles of the two isolates. The repellencies of synthetic blends of 10 prominent components that mimicked the volatiles of each of the two isolates were significantly different. Subtractive bioassays showed that the repellency of each isolate was due to synergistic effects …
Development Of A Gravid Trap For Collecting Live Malaria Vectors Anopheles Gambiae S.L, Sisay Dugassa, Jenny M. Lindh, Florence Oyieke, Wolfgang R. Mukabana, Steven W. Lindsay, Ulrike Fillinger
Development Of A Gravid Trap For Collecting Live Malaria Vectors Anopheles Gambiae S.L, Sisay Dugassa, Jenny M. Lindh, Florence Oyieke, Wolfgang R. Mukabana, Steven W. Lindsay, Ulrike Fillinger
All Peer-Reviewed Publications
BACKGROUND: Effective malaria vector control targeting indoor host-seeking mosquitoes has resulted in fewer vectors entering houses in many areas of sub-Saharan Africa, with the proportion of vectors outdoors becoming more important in the transmission of this disease. This study aimed to develop a gravid trap for the outdoor collection of the malaria vector Anopheles gambiae s.l. based on evaluation and modification of commercially available gravid traps. METHODS: Experiments were implemented in an 80 m(2) semi-field system where 200 gravid Anopheles gambiae s.s. were released nightly. The efficacy of the Box, CDC and Frommer updraft gravid traps was compared. The Box …
Comparison Of The Effects Of Extracts From Three Vitex Plant Species On Anopheles Gambiae S.S. (Diptera: Culicidae) Larvae, Mokua G. Nyamoita, Innocent Ester, Mbwambo H. Zakaria, Lwande Wilber, Ochola J. Bwire, Hassanali Ahmed
Comparison Of The Effects Of Extracts From Three Vitex Plant Species On Anopheles Gambiae S.S. (Diptera: Culicidae) Larvae, Mokua G. Nyamoita, Innocent Ester, Mbwambo H. Zakaria, Lwande Wilber, Ochola J. Bwire, Hassanali Ahmed
All Peer-Reviewed Publications
Acetone and methanol extracts of different parts of three Vitex species (leaves and stem bark of Vitex trifolia, leaves, stem bark and root bark of Vitex schiliebenii and stem and root bark of Vitex payos) were evaluated for their potential to control Anopheles gambiae Giles s.s. larvae (Diptera: Culicidae). The extracts gave different levels and rate of mortality of the larvae. Some (methanol extract of V. trifolia leaves, acetone extracts of stem bark and leaves of V. schiliebenii, acetone extract of root bark of V. payos) caused 100% mortality at 100ppm in 72h, with those of V. schiliebenii and V. …
First Record Of Calophya Schini (Hemiptera: Calophyidae) In Ethiopia And Kenya, William A. Overholt, Robert S. Copeland, Susan E. Halbert
First Record Of Calophya Schini (Hemiptera: Calophyidae) In Ethiopia And Kenya, William A. Overholt, Robert S. Copeland, Susan E. Halbert
All Peer-Reviewed Publications
A South American leaf galling psyllid, Calophya schini Tuthill, has recently been discovered attacking the South American tree Schinus molle L. in Kenya and Ethiopia. This represents the first record of the psyllid in each country and the only record of C. schini in Africa outside of South Africa. In Kenya, the psyllid was parasitized by an unidentified tetrastichine (Eulophidae), probably of the genus Tamarixia, while in Ethiopia C. schini nymphs were heavily parasitized by an unidentified hymenopteran. Copyright © icipe 2013.
Occurrence, Diversity And Pattern Of Damage Of Oplostomus Species (Coleoptera: Scarabaeidae), Honey Bee Pests In Kenya, Ayuka T. Fombong, Fiona N. Mumoki, Elliud Muli, Daniel K. Masiga, Richard T. Arbogast, Peter E.A. Teal, Baldwyn Torto
Occurrence, Diversity And Pattern Of Damage Of Oplostomus Species (Coleoptera: Scarabaeidae), Honey Bee Pests In Kenya, Ayuka T. Fombong, Fiona N. Mumoki, Elliud Muli, Daniel K. Masiga, Richard T. Arbogast, Peter E.A. Teal, Baldwyn Torto
All Peer-Reviewed Publications
Several arthropod pests including the hive beetles Aethina tumida and Oplostomus haroldi and the ectoparasite Varroa destructor have recently been identified as associated with honey bee colonies in Kenya. Here, we report the first documentation of Oplostomus fuligineus in Kenya, a related scarab of O. haroldi, and distribution, diversity and pattern of damage of the two scarab species on honey bee colonies. Sequence analyses of mitochondrial cytochrome oxidase I gene revealed that there was sufficient sequence divergence to separate both Oplostomus beetles. The same molecular marker separated O. haroldi according to place of origin in Kenya. We further show from …
Common Host-Derived Chemicals Increase Catches Of Disease-Transmitting Mosquitoes And Can Improve Early Warning Systems For Rift Valley Fever Virus, David P. Tchouassi, Rosemary Sang, Catherine L. Sole, Armanda D.S. Bastos, Peter E.A. Teal, Christian Borgemeister, Baldwyn Torto
Common Host-Derived Chemicals Increase Catches Of Disease-Transmitting Mosquitoes And Can Improve Early Warning Systems For Rift Valley Fever Virus, David P. Tchouassi, Rosemary Sang, Catherine L. Sole, Armanda D.S. Bastos, Peter E.A. Teal, Christian Borgemeister, Baldwyn Torto
All Peer-Reviewed Publications
Rift Valley fever (RVF), a mosquito-borne zoonosis, is a major public health and veterinary problem in sub-Saharan Africa. Surveillance to monitor mosquito populations during the inter-epidemic period (IEP) and viral activity in these vectors is critical to informing public health decisions for early warning and control of the disease. Using a combination of field bioassays, electrophysiological and chemical analyses we demonstrated that skin-derived aldehydes (heptanal, octanal, nonanal, decanal) common to RVF virus (RVFV) hosts including sheep, cow, donkey, goat and human serve as potent attractants for RVFV mosquito vectors. Furthermore, a blend formulated from the four aldehydes and combined with …
Gardening For Native Bees In Utah And Beyond, James H. Cane, Linda Kervin
Gardening For Native Bees In Utah And Beyond, James H. Cane, Linda Kervin
All Current Publications
Utah is home to more than 20 percent of the 4,000+ named species of wild bees that are native to North America. Except for bumblebees and some sweat bees, our native bees are solitary, not social, many with just one annual generation that coincides with bloom by their favorite floral hosts. In contrast, the familiar honeybee is highly social, has perennial colonies, and was brought to North America by settlers from Europe.
Spiders, Ryan S. Davis, Ricardo A. Ramirez
Spiders, Ryan S. Davis, Ricardo A. Ramirez
All Current Publications
Spiders are arachnids, a group that includes other 8-legged arthropods like ticks, mites, sun spiders, scorpions, and harvestmen (daddy longlegs). There are approximately 621 species of spiders known to occur in Utah (Allred and Kaston, 1983). Spiders are beneficial predators and the majority of them are harmless to humans.