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Articles 1 - 30 of 207
Full-Text Articles in Life Sciences
Managing Threats To The Urban Forest: From Dutch Elm Disease To Emerald Ash Borer - Learning From Experience, Christopher J. Borman
Managing Threats To The Urban Forest: From Dutch Elm Disease To Emerald Ash Borer - Learning From Experience, Christopher J. Borman
Doctor of Plant Health Program: Dissertations and Student Research
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 …
A New Species And Synonymy Of The Neotropical Eucelatoria Townsend And Redescription Of Myiodoriops Townsend, Diego J. Inclán, John O. Stireman Iii
A New Species And Synonymy Of The Neotropical Eucelatoria Townsend And Redescription Of Myiodoriops Townsend, Diego J. Inclán, John O. Stireman Iii
Biological Sciences Faculty Publications
The New World tropics represents the most diverse region for tachinid parasitoids (Diptera: Tachinidae), but it also contains the most narrowly defined, and possibly the most confusing, tachinid genera of any biogeographic region. This over-splitting of genera and taxonomic confusion has limited progress toward our understanding the family in this region and much work is needed to revise, redefine, and make sense of the profusion of finely split taxa. In a recent analysis of the Neotropical genus Erythromelana Townsend, two species previously assigned to this genus, Euptilodegeeria obumbrata (Wulp) and Myiodoriops marginalis Townsend were reinstated as monotypic genera. In the …
Transcriptome Analysis Of Host-Associated Differentiation In Bemisia Tabaci (Hemiptera: Aleyrodidae), Wen Xie, Qingjun Wu, Shaoli Wang, Xiaoguo Jiao, Litao Guo, Xuguo Zhou, Youjun Zhang
Transcriptome Analysis Of Host-Associated Differentiation In Bemisia Tabaci (Hemiptera: Aleyrodidae), Wen Xie, Qingjun Wu, Shaoli Wang, Xiaoguo Jiao, Litao Guo, Xuguo Zhou, Youjun Zhang
Entomology Faculty Publications
Host-associated differentiation is one of the driving forces behind the diversification of phytophagous insects. In this study, host induced transcriptomic differences were investigated in the sweetpotato whitefly Bemisia tabaci, an invasive agricultural pest worldwide. Comparative transcriptomic analyses using coding sequence (CDS), 5′ and 3′ untranslated regions (UTR) showed that sequence divergences between the original host plant, cabbage, and the derived hosts, including cotton, cucumber and tomato, were 0.11–0.14%, 0.19–0.26%, and 0.15–0.21%, respectively. In comparison to the derived hosts, 418 female and 303 male transcripts, respectively, were up-regulated in the original cabbage strain. Among them, 17 transcripts were consistently up-regulated …
Low Temperature Tolerance Of Adult Drosophila Suzukii (Diptera: Drosophilidae), Ruth Jakobs
Low Temperature Tolerance Of Adult Drosophila Suzukii (Diptera: Drosophilidae), Ruth Jakobs
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 …
Mp763: Without Benefit Of Insects: The Story Of Edith M. Patch Of The University Of Maine, K. Elizabeth Gibbs
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
(R)-Desmolactone Is A Sex Pheromone Or Attractant For The Endangered Valley Elderberry Longhorn Beetle Desmocerus Californicus Dimorphus And Several Congeners (Cerambycidae: Lepturinae), A. M. Ray, R. A. Arnold, I. Swift, P. A. Schapker, S. Mccann, C. J. Marshall, J. S. Mcelfresh, J. G. Millar
(R)-Desmolactone Is A Sex Pheromone Or Attractant For The Endangered Valley Elderberry Longhorn Beetle Desmocerus Californicus Dimorphus And Several Congeners (Cerambycidae: Lepturinae), A. M. Ray, R. A. Arnold, I. Swift, P. A. Schapker, S. Mccann, C. J. Marshall, J. S. Mcelfresh, J. G. Millar
Faculty Scholarship
We report here that (4R,9Z)-hexadec-9-en-4-olide [(R)-desmolactone] is a sex attractant or sex pheromone for multiple species and subspecies in the cerambycid genus Desmocerus. This compound was previously identified as a female-produced sex attractant pheromone of Desmocerus californicus californicus. Headspace volatiles from female Desmocerus aureipennis aureipennis contained (R)-desmolactone, and the antennae of adult males of two species responded strongly to synthetic (R)-desmolactone in coupled gas chromatography-electroantennogram analyses. In field bioassays in California, Oregon, and British Columbia, traps baited with synthetic (R)-desmolactone captured males of several Desmocerus species and subspecies. Only male beetles were captured, indicating that this compound acts as a …
Control Of Agrilus Ruficollis (Coleoptera: Buprestidae) With Insecticides And Identifying Visual Attractants For Use In A Monitoring Trap, Soo-Hoon Kim
Graduate Theses and Dissertations
The rednecked cane borer, Agrilus ruficollis (F.), is a pest of cultivated and wild blackberries in the Midwestern and Eastern parts of the United States. Feeding, mating, egg laying and development of A. ruficollis from larvae to adult only occurs on primocane, the first year vegetative growth stage of blackberries, and not on the second year fruiting stage called floricanes that die after fruiting. Damage from this pest is caused by the larva girdling the primocane and tunneling in the pith, causing the formation of a gall. Gall formation on the primocane increases the chance of winter injury and can …
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 …
Hexapod Herald - Vol. 26, No. 6, December 2014
Hexapod Herald - Vol. 26, No. 6, December 2014
Hexapod Herald and Other Entomology Department Newsletters
Contents: Welcome - Congratulations - Grants - Publications - Meeting an Off-Campus Students - Faculty News - Blasts from the Past - Calendar of Events
Biology And Control Of The Bed Bug Cimex Lectularius L., Kevin Hinson
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 …
Cold Hardiness And Deacclimation Of Overwintering Papilio Zelicaon Pupae, Caroline M. Williams, Nicolai Annegret, Brent J. Sinclair, Laura V. Ferguson, Mark A. Bernards, Jessica J. Hellmann
Cold Hardiness And Deacclimation Of Overwintering Papilio Zelicaon Pupae, Caroline M. Williams, Nicolai Annegret, Brent J. Sinclair, Laura V. Ferguson, Mark A. Bernards, Jessica J. Hellmann
Biology Publications
Seasonally-acquired cold tolerance can be reversed at warm temperatures, leaving temperate ectotherms vulnerable to cold snaps. However, deacclimation, and its underlying mechanisms, has not been well-explored in insects. Swallowtail butterflies are widely distributed but in some cases their range is limited by low temperature and their cold tolerance is seasonally acquired, implying that they experience mortality resulting from deacclimation. We investigated cold tolerance and hemolymph composition of Anise swallowtail (Papilio zelicaon) pupae during overwintering in the laboratory, and after four days exposure to warm temperatures in spring. Overwintering pupae had supercooling points around − 20.5 °C and survived …
The Effect Of Agricultural Practices On Sugar Beet Root Aphid (Pemphigus Betae Doane) And Beneficial Epigeal Arthropods, Rudolph J. Pretorius
The Effect Of Agricultural Practices On Sugar Beet Root Aphid (Pemphigus Betae Doane) And Beneficial Epigeal Arthropods, Rudolph J. Pretorius
Department of Entomology: Dissertations, Theses, and Student Research
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 …
Biological Control Of Red Imported Fire Ant (Solenopsis Invicta) Using Pseudacteon (Diptera: Phoridae) In Central Arkansas, Sim Mckague Barrow
Biological Control Of Red Imported Fire Ant (Solenopsis Invicta) Using Pseudacteon (Diptera: Phoridae) In Central Arkansas, Sim Mckague Barrow
Graduate Theses and Dissertations
Red imported fire ants are major pests in the southeastern United States. As a part of an integrated pest management strategy, a biological control program has been implemented which includes Pseudacteon decapitating flies. These flies are parasitoids of fire ant workers and two species of Pseudacteon are established in Arkansas: Pseudacteon tricuspis and Pseudacteon curvatus. Pseudacteon cultellatus and P. obtusus were released in the spring and fall of 2013. Despite sampling throughout 2014, establishment cannot be confirmed. Two phorid fly sampling methods, hand aspirating and sticky traps, were studied. A vacuum aspirator was compared with two sticky trap configurations. Sticky …
Evaluation Of Medicago Truncatula Accessions For Triterpene Saponins And Their Potential Impacts On Plant Pests, Samantha Roberson
Evaluation Of Medicago Truncatula Accessions For Triterpene Saponins And Their Potential Impacts On Plant Pests, Samantha Roberson
Graduate Theses and Dissertations
Plants have developed numerous ways to protect themselves from microbes and insects, including producing secondary metabolites that negatively impact an invading pathogen or pest. Saponins are specialized metabolites found in many plant species and may play a role in protecting the plant. Though saponins are found in many plant species, triterpene saponins are found primarily in dicotyledons, including legumes. Medicago truncatula is a model system for studying legume biology and some accessions accumulate high concentrations of saponins. Accessions of M. truncatula known to have differing levels of saponins in both foliar and root tissues were tested for their suitability as …
Population Genetics, Distributions And Phenology Of Bombus Latreille, 1802 And Xylocopa Latreille, 1802 (Hymenoptera: Apidae), Amber Dawn Tripodi
Population Genetics, Distributions And Phenology Of Bombus Latreille, 1802 And Xylocopa Latreille, 1802 (Hymenoptera: Apidae), Amber Dawn Tripodi
Graduate Theses and Dissertations
This work addresses multiple knowledge gaps in bee ecology, population health and phylogeography in order to provide insights into the changing distributions of native bees. A comparison of Arkansas bumble bee records mirrors range-wide surveys, with records of stable species (Bombus bimaculatus Cresson, 1863 and B. impatiens Cresson, 1863) increasing three-fold, and records of the declining B. pensylvanicus (DeGeer, 1773) dropping to 60% of historical levels. However, nationally-recommended conservation-genetics tools did not mirror these results on a regional level. Stable and declining species had equivalent genetic diversity in samples from Arkansas and Tennessee (HS range: 0.46-0.63). Diploid males, …
Selection Of Reference Genes For Expression Analysis Using Quantitative Real-Time Pcr In The Pea Aphid, Acyrthosiphon Pisum (Harris) (Hemiptera, Aphidiae), Chunxiao Yang, Huipeng Pan, Yong Liu, Xuguo Zhou
Selection Of Reference Genes For Expression Analysis Using Quantitative Real-Time Pcr In The Pea Aphid, Acyrthosiphon Pisum (Harris) (Hemiptera, Aphidiae), Chunxiao Yang, Huipeng Pan, Yong Liu, Xuguo Zhou
Entomology Faculty Publications
To facilitate gene expression study and obtain accurate qRT-PCR analysis, normalization relative to stable expressed housekeeping genes is required. In this study, expression profiles of 11 candidate reference genes, including actin (Actin), elongation factor 1 α (EF1A), TATA-box-binding protein (TATA), ribosomal protein L12 (RPL12), β-tubulin (Tubulin), NADH dehydrogenase (NADH), vacuolar-type H+-ATPase (v-ATPase), succinate dehydrogenase B (SDHB), 28S ribosomal RNA (28S), 16S ribosomal RNA (16S), and 18S ribosomal RNA (18S) from the pea aphid Acyrthosiphon pisum, …
A Cross-Seasonal Perspective On Local Adaptation: Metabolic 1 Plasticity Mediates Responses To Winter In A Thermal-2 Generalist Moth, Brent J. Sinclair, Caroline M. Williams, Wesley D. Chick
A Cross-Seasonal Perspective On Local Adaptation: Metabolic 1 Plasticity Mediates Responses To Winter In A Thermal-2 Generalist Moth, Brent J. Sinclair, Caroline M. Williams, Wesley D. Chick
Biology Publications
No abstract provided.
Novel Mutations And Mutation Combinations Of Ryanodine Receptor In A Chlorantraniliprole Resistant Population Of Plutella Xylostella (L.), Lei Guo, Pei Liang, Xuguo Zhou, Xiwu Gao
Novel Mutations And Mutation Combinations Of Ryanodine Receptor In A Chlorantraniliprole Resistant Population Of Plutella Xylostella (L.), Lei Guo, Pei Liang, Xuguo Zhou, Xiwu Gao
Entomology Faculty Publications
A previous study documented a glycine to glutamic acid mutation (G4946E) in ryanodine receptor (RyR) was highly correlated to diamide insecticide resistance in field populations of Plutella xylostella (Lepidoptera: Plutellidae). In this study, a field population collected in Yunnan province, China, exhibited a 2128-fold resistance to chlorantraniliprole. Sequence comparison between resistant and susceptible P. xylostella revealed three novel mutations including a glutamic acid to valine substitution (E1338D), a glutamine to leucine substitution (Q4594L) and an isoleucine to methionine substitution (I4790M) in highly conserved regions of RyR. Frequency analysis of all four mutations in this field population showed that the three …
Characterization Of Juvenile Hormone Biosynthetic Enzymes In The Mosquito, Aedes Aegypti, Pratik Nyati
Characterization Of Juvenile Hormone Biosynthetic Enzymes In The Mosquito, Aedes Aegypti, Pratik Nyati
FIU Electronic Theses and Dissertations
The juvenile hormones (JHs) are sesquiterpenoid compounds that play a central role in insect reproduction, development and behavior. They are synthesized and secreted by a pair of small endocrine glands, the corpora allata (CA), which are intimately connected to the brain. The enzymes involved in the biosynthesis of JH are attractive targets for the control of mosquito populations. This dissertation is a comprehensive functional study of five Aedes aegypti CA enzymes, HMG-CoA synthase (AaHMGS), mevalonate kinase (AaMK), phosphomevalonate kinase (AaPMK), farnesyl diphosphate synthase (AaFPPS) and farnesyl pyrophosphate phosphatase (AaFPPase).
The …
Ant Colonies Prefer Infected Over Uninfected Nest Sites, Luigi Pontieri, Svjetlana Vojvodic, Riley Graham, Jes Søe Pedersen, Timothy A. Linksvayer
Ant Colonies Prefer Infected Over Uninfected Nest Sites, Luigi Pontieri, Svjetlana Vojvodic, Riley Graham, Jes Søe Pedersen, Timothy A. Linksvayer
College of Science & Mathematics Departmental Research
During colony relocation, the selection of a new nest involves exploration and assessment of potential sites followed by colony movement on the basis of a collective decision making process. Hygiene and pathogen load of the potential nest sites are factors worker scouts might evaluate, given the high risk of epidemics in group-living animals. Choosing nest sites free of pathogens is hypothesized to be highly efficient in invasive ants as each of their introduced populations is often an open network of nests exchanging individuals (unicolonial) with frequent relocation into new nest sites and low genetic diversity, likely making these species particularly …
Eight Legged Encounters, Eileen A. Hebets
Eight Legged Encounters, Eileen A. Hebets
Eileen Hebets Publications
This program was funded in part by a National Science Foundation grant (DRL–1241482 to EAH). Material was developed in collaboration with Marie- Claire Chelini, Jessie Rose Storz, Cody Storz, and Malcolm Rosenthal. Steven Schwartz, Jason Stafstrom, Kathy French, Priscilla Grew, and Judy Diamond were all extremely helpful in grant writing, facilitating the first live event, and/or discussions. Pawl Tisdale (artist) was phenomenal to work with on all aspects of the project!
TABLE OF CONTENTS
CLASSIFICATION & TAXONOMY STATIONS
I. WHAT IS AN ARTHROPOD? page 4 a. The goal of this station is to introduce the audience to some basic information …
Nebline, Nov./Dec. 2014
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Tiny Tastes Can Total BIG CALORIES Over the Holiday Season
Food & Health
Family Living
Farm & Acreage
Home & Family Living
Horticulture
Pests & Wildlife
4-H & Youth
Extension Calendar
and other extension news and events
Validation Of Reference Housekeeping Genes For Gene Expression Studies In Western Corn Rootworm (Diabrotica Virgifera Virgifera), Thaís Barros Rodrigues, Chitvan Khajuria, Haichuan Wang, Natalie Matz, Danielle Cunha Cardoso, Fernando Hercos Valicente, Xuguo Zhou, Blair Siegfried
Validation Of Reference Housekeeping Genes For Gene Expression Studies In Western Corn Rootworm (Diabrotica Virgifera Virgifera), Thaís Barros Rodrigues, Chitvan Khajuria, Haichuan Wang, Natalie Matz, Danielle Cunha Cardoso, Fernando Hercos Valicente, Xuguo Zhou, Blair Siegfried
Entomology Faculty Publications
Quantitative Real-time PCR (qRT-PCR) is a powerful technique to investigate comparative gene expression. In general, normalization of results using a highly stable housekeeping gene (HKG) as an internal control is recommended and necessary. However, there are several reports suggesting that regulation of some HKGs is affected by different conditions. The western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), is a serious pest of corn in the United States and Europe. The expression profile of target genes related to insecticide exposure, resistance, and RNA interference has become an important experimental technique for study of western corn rootworms; however, lack …
White Fringetree, Chionanthus Virginicus, As A Novel Larval Host For Emerald Ash Boer, Don Cipollini
White Fringetree, Chionanthus Virginicus, As A Novel Larval Host For Emerald Ash Boer, Don Cipollini
Biological Sciences Faculty Publications
Emerald ash borer is an invasive Asian pest of ash species in North America. All North American species of ash tested so far are susceptible to it, but there are no published reports of this insect developing fully in non-ash hosts in the field in North America. I report here evidence that EAB can attack and complete development in white fringetree, Chionanthus virginicus L., a species native to the southeastern U.S. that is also planted ornamentally.
Next-Generation Field Guides, Elizabeth J. Farnsworth, Miyoko Chu, W. John Kress, Amanda K. Neill, Jason H. Best, John Pickering, Robert D. Stevenson, Gregory W. Courtney, John K. Vandyk, Aaron M. Ellison
Next-Generation Field Guides, Elizabeth J. Farnsworth, Miyoko Chu, W. John Kress, Amanda K. Neill, Jason H. Best, John Pickering, Robert D. Stevenson, Gregory W. Courtney, John K. Vandyk, Aaron M. Ellison
John K. VanDyk
To conserve species, we must first identify them. Field researchers, land managers, educators, and citizen scientists need up-to-date and accessible tools to identify organisms, organize data, and share observations. Emerging technologies complement traditional, book-form field guides by providing users with a wealth of multimedia data. We review technical innovations of next-generation field guides, including Web-based and stand-alone applications, interactive multiple-access keys, visual-recognition software adapted to identify organisms, species checklists that can be customized to particular sites, online communities in which people share species observations, and the use of crowdsourced data to refine machine-based identification algorithms. Next-generation field guides are user …
Use Of The Internet For Information Organization, Distance Learning, And Specimen Presentation , John Kevin Vandyk
Use Of The Internet For Information Organization, Distance Learning, And Specimen Presentation , John Kevin Vandyk
John K. VanDyk
The advent of the internet has had an effect on the discipline of entomology. The history of the relationship between entomology and the internet is summarized, and several effects are examined in detail. One effect is to create an explosion of available information about insects and pest management, largely available on the world-wide web (WWW). A metadata-based solution to categorizing, searching and filtering this information is presented, along with a case study that used this solution to examine the value added by the use of metadata. In the case study website, one third of the users arrived at web pages …
Tal Effector-Nucleotide Targeter (Tale-Nt) 2.0: Tools For Tal Effector Design And Target Prediction, Erin L. Doyle, Nicholas J. Booher, Daniel S. Standage, Daniel F. Voytas, Volker P. Brendel, John K. Vandyk, Adam J. Bogdanove
Tal Effector-Nucleotide Targeter (Tale-Nt) 2.0: Tools For Tal Effector Design And Target Prediction, Erin L. Doyle, Nicholas J. Booher, Daniel S. Standage, Daniel F. Voytas, Volker P. Brendel, John K. Vandyk, Adam J. Bogdanove
John K. VanDyk
Transcription activator-like (TAL) effectors are repeat-containing proteins used by plant pathogenic bacteria to manipulate host gene expression. Repeats are polymorphic and individually specify single nucleotides in the DNA target, with some degeneracy. A TAL effector-nucleotide binding code that links repeat type to specified nucleotide enables prediction of genomic binding sites for TAL effectors and customization of TAL effectors for use in DNA targeting, in particular as custom transcription factors for engineered gene regulation and as site-specific nucleases for genome editing. We have developed a suite of web-based tools called TAL Effector-Nucleotide Targeter 2.0 (TALE-NT 2.0;https://boglab.plp.iastate.edu/) that enables design of custom …
Management Of Bacterial Wilt On Muskmelon Using Actigard, Fawzia Mumtaz
Management Of Bacterial Wilt On Muskmelon Using Actigard, Fawzia Mumtaz
Open Access Theses
Bacterial wilt of muskmelon caused by Erwinia trachephila (E.F. Smith), is one of the most important diseases of cucurbits, particularly muskmelon, in the world. This pathogen is transmitted by the striped cucumber beetle,Accalyma vittatum (F.), and causes serious economic losses in fruit yield and quality. Control of this disease is usually accomplished by applying insecticides to kill the beetles before disease transmission occurs. The goal of this study was to reduce the bacterial wilt incidence or beetle feeding on muskmelon using an alternative control method, the plant activator acibenzolar-S-methyl (Actigard) ® . The potential for using acibenzolar-S-methyl as a …
Suitability Of Blue Ash (Fraxinus Quadrangulata) And Green Ash (F. Pennsylvanica) To Emerald Ash Borer (Agrilus Planipennis) And Its Larval Parasitoid Tetrastichus Planipennisi., Donnie "L. " Peterson
Suitability Of Blue Ash (Fraxinus Quadrangulata) And Green Ash (F. Pennsylvanica) To Emerald Ash Borer (Agrilus Planipennis) And Its Larval Parasitoid Tetrastichus Planipennisi., Donnie "L. " Peterson
Open Access Theses
Emerald ash borer (EAB) (Agrilus planipennis ) is a primary pest that has killed tens of millions of North American ash (Fraxinus spp.) trees. The larval parasitoid Tetrastichus planipennisi was introduced from China as part of a classical biological control program for long-term EAB management. The high mortality rates of ash trees greatly reduce the number of EAB hosts and may make it difficult for parasitoids to persist. However, blue ash ( F. quadrangulata ) is relatively resistant and appears to be able to survive EAB infestation. If natural enemies can attack EAB in infested blue ash they …
Potential Impact Of Neonicotinoid Insecticides On Honey Bees (Apis Mellifera) In Muskmelon Production, Kira L. Nixon
Potential Impact Of Neonicotinoid Insecticides On Honey Bees (Apis Mellifera) In Muskmelon Production, Kira L. Nixon
Open Access Theses
Honey bees (Apis mellifera ) provide pollination services to many agricultural crops, including cucurbits. Neonicotinoids are commonly applied to cucurbits where honey bee colonies are often rented for sufficient pollination and proper fruit set. The goals of this study were to determine the potential impact of neonicotinoid residues on honey bees in muskmelon production and to determine the extent and duration of striped cucumber beetle control among treatments. The neonicotinoids evaluated were imidacloprid and its metabolites imidacloprid olefin and 5-hydroxyimidacloprid, thiamethoxam and its metabolite clothianidin, and acetamiprid. Thiamethoxam applied as a FarMore ® seed treatment resulted in a highest …