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Articles 1 - 30 of 73
Full-Text Articles in Entomology
Butterflies & You: Considerations Of Human Relationships With The Natural World, M. E. Colby
Butterflies & You: Considerations Of Human Relationships With The Natural World, M. E. Colby
Undergraduate Honors Theses
Science communication only accounts for approximately 2% of the entire scientific output of 2017-2022 (Parejo-Cuéllar et. al, 2024). It is an under-researched and under-valued field, especially in an age that has devalued science as a whole. The delicate art of explaining complicated ideas to people who are unfamiliar with scientific jargon is vital to humans’ understanding of the world. Butterflies & You is a documentary film exploring the relationship between humans and the many different butterfly species that call Illinois home. Video-based science communication is important to research and practice because of its impact on environmental advocacy and the growing …
Prevalence Of Insecticide Resistance Gene In Aedes Albopictus Populations Of Central Illinois, Merylann Akinyi Ochieng
Prevalence Of Insecticide Resistance Gene In Aedes Albopictus Populations Of Central Illinois, Merylann Akinyi Ochieng
Masters Theses
The Asian tiger mosquito, Aedes albopictus, is a significant vector for diseases such as Dengue, Chikungunya, and Zika. Its increasing resistance to insecticides poses a critical challenge for vector control efforts. This study investigates knockdown resistance (kdr) mutations in the voltage-gated sodium channel (VGSC) genes, specifically V1016G and F1534C, which are associated with pyrethroid resistance. Aedes albopictus populations from Central Illinois were analyzed using allele-specific PCR techniques to address three primary objectives: (1) determining whether V1016G and F1534C mutations are present in these populations, (2) determining which mutation is more widespread, and (3) investigating how resistance gene …
Prevalence Of Insecticide Resistance Gene In Aedes Albopictus Population In Illinois Regions, Merylann Ochieng
Prevalence Of Insecticide Resistance Gene In Aedes Albopictus Population In Illinois Regions, Merylann Ochieng
2024 Awards for Excellence in Student Research and Creative Activity - Documents
Mosquitoes are vectors known to transmit many pathogens and parasites that cause serious human diseases such as Malaria, Dengue, Yellow and Chikungunya fever, Encephalitis, and Filariasis (Becker et al., 2010) (Franklinos et al., 2019). Aedes albopictus specie transmits Zika, Chikungunya, yellow Fever and Rift valley fever viruses (Leta et al., 2018). Aedes species are geographically invading new areas due to globalization and environmental changes (Lwande et al., 2020). Temperature increase, severe rainfall, and high humidity encourage diseases to spread to new areas where new vectors may act as carriers (Näslund et al., 2021). Aedes albopictus are expanding further along the …
Influence Of Seeding Strategy On Insect Communities Within Utility Lands, Kylee E. Nissen
Influence Of Seeding Strategy On Insect Communities Within Utility Lands, Kylee E. Nissen
Masters Theses
Pollinator populations are in decline globally due to anthropogenic changes, particularly in areas affected by agricultural expansion and urbanization. Utility lands - managed to prevent tall vegetation encroachment - represent an opportunity to establish native grasslands and support pollinator communities. This study investigates how different seeding strategies used by utility companies influence pollinator community composition within a 15-acre electric right-of-way (ROW) outside St. Louis, Illinois. Despite the logical benefits of native seeding to pollinators, utility companies are often hesitant to do this, often favoring seeding to turf. Seeded in late 2021, the site incorporates randomized plots with turfgrass seeding (no …
Investigating Morphological And Molecular Identifiers For Culex Restuans And Culex Pipiens From Central Illinois, Savannah L. Ettien
Investigating Morphological And Molecular Identifiers For Culex Restuans And Culex Pipiens From Central Illinois, Savannah L. Ettien
Masters Theses
Some of the most prominent vectors for West Nile Virus are mosquitoes of the genus Culex. As a result, efforts have been made to monitor the spread of Culex species as climate change has allowed them to travel to places that they never inhabited before. Since Cx. restuans is a less prevalent vector, most studies for prevention focus on Cx. pipiens, which is the primary vector for the spread of West Nile Virus in the Midwestern United States, especially in the late summer and early fall seasons. As both species share many morphological characteristics and are present at …
Wolbachia Infection In Gall Associated Insect Communities In Illinois And Indiana, Jakeb Watts
Wolbachia Infection In Gall Associated Insect Communities In Illinois And Indiana, Jakeb Watts
Masters Theses
Wolbachia is a maternally inherited, gram-negative bacterium and has been found to be associated with up to 60% of all insects, frequently resulting in male-killing, feminization, and cytoplasmic incompatibility in the hosts. Gall wasps and other gall-forming insects induce on various host plants abnormal tissue growths, or plant galls, with distinct morphology. They are considered as obligatory parasites to their host plant. The presence of Wolbachia infection in gall wasp populations in North America has not been extensively documented. Given the strong influence on host reproduction, not knowing Wolbachia infection in insect populations prevents the understanding of how populations are …
Deciphering The Role Of Mitochondrial Physiology And Thermal Acclimation In Shaping Whole Organismal Performance Of An Invasive Forest Pest, Essa Alrashdi
Masters Theses
Environmental factors such as temperature are substantial determinants of the spongy moth, L. dispar, distribution, reproduction, and growth. Accumulating energy reserves at the larval stage is particularly important to L. dispar, since the larvae metamorphose into a fully-grown, non-feeding adult. As non-feeding adults, the energy balance of the pupae must be adequate, to ensure enough energy reserves for adult dispersal, egg maturation and overall persistence of the species in the region. At this stage, environmental temperature also determines daily metabolic demands, and the overall cost of sustaining ecologically relevant activities. Various hypotheses describing a mismatched growth and metabolic …
Effects Of Chemical Variation On Competition And Insect Communities Across Solidago Altissima Genotypes, Bryan Scott Foster Ii
Effects Of Chemical Variation On Competition And Insect Communities Across Solidago Altissima Genotypes, Bryan Scott Foster Ii
Masters Theses
Individuals within a plant species can differ greatly from one another, especially regarding the range of chemical compounds produced. However, the functions of many of these chemicals are unknown, but likely include defenses against herbivores, attractants for pollinators and seed dispersers, as well as mechanisms for resource competition. To assess the effects of foliar chemical composition on interspecific plant competition and insect communities, I conducted a common garden and greenhouse experiment using 24 genotypes of the allelopathic species Solidago altissima for which the foliar chemistry had been characterized. Using these data and chemical profiles of S. altissima, I linked …
Effects Of Insect Opportunists On A Four-Level Trophobiotic System Involving Nectar-Producing Galls Of The Cynipid Wasp Disholcaspis Quercusmamma (Hymenoptera: Cynipidae), Stephanie L. Smith
Effects Of Insect Opportunists On A Four-Level Trophobiotic System Involving Nectar-Producing Galls Of The Cynipid Wasp Disholcaspis Quercusmamma (Hymenoptera: Cynipidae), Stephanie L. Smith
Masters Theses
The induction of plant galls is considered an adaptive life history trait found in many insect groups. The formation of galls provides several advantages to the gall maker, such as enhanced nutrition, favorable microclimate, and protection from natural enemies, including parasitoids, inquilines, and predators. Order Hymenoptera has many gall-making species, belonging to the gall wasp family Cynipidae. As an extended phenotype of the gall makers, some galls exhibit very sophisticated adaptive mechanisms involving multilevel species interactions. In particular, the oak galls of the Cynipid species Disholcaspis quercusmamma, found in much of Illinois, produce a palatable, sugary nectar-like secretion, attracting …
Reduced File Size: Quick And Easy Guide To Common Butterflies: An Introduction To The 25 Most Commonly Encountered Butterflies In The Midwest, Paul Switzer
Faculty Research & Creative Activity
If you are new to butterfly watching, this is the book for you! It covers 25 of the most commonly encountered butterflies in the Midwestern U.S. Learning these common species will give you a great start in your discovery of the more than 100 butterfly species in our region, many of which look very similar to those included in this guide.
Quick And Easy Guide To Common Butterflies: An Introduction To The 25 Most Commonly Encountered Butterflies In The Midwest, Paul Switzer
Quick And Easy Guide To Common Butterflies: An Introduction To The 25 Most Commonly Encountered Butterflies In The Midwest, Paul Switzer
Faculty Research & Creative Activity
If you are new to butterfly watching, this is the book for you! It covers 25 of the most commonly encountered butterflies in the Midwestern U.S. Learning these common species will give you a great start in your discovery of the more than 100 butterfly species in our region, many of which look very similar to those included in this guide.
Quick And Easy Guide To Common Butterflies: An Introduction To The 25 Most Commonly Encountered Butterflies In The Midwest (Reduced File Size), Paul Switzer
Faculty Research & Creative Activity
If you are new to butterfly watching, this is the book for you! It covers 25 of the most commonly encountered butterflies in the Midwestern U.S. Learning these common species will give you a great start in your discovery of the more than 100 butterfly species in our region, many of which look very similar to those included in this guide.
Haplotype Diversity And Population Genetic Structure Of Antistrophus Gall Wasps Associated With Two Silphium Species And Implication For Host Mediated Speciation, Jiaxin Deng
Masters Theses
Gall making insects form a special feeding guild of phytophagous animals, and by manipulating host plant tissue differentiation, are able to avoid plant chemical defenses and thus have no need for counter defense mechanisms. Host plant selection is crucial to the evolution of these insects because successful gall formation is largely dependent on host plant ability to respond to stimuli. In Illinois and neighboring states, Antistrophus gall wasps associated with the rosin weed (S. integrifolium) and the cup plant (S. perfoliatum) are morphologically indistinguishable and thus have been treated as belonging to single species. However, the wasps from the host …
Investigating The Prevalence Of An Insecticide Resistance Gene In Culex Mosquito Populations Of Central Illinois, Kylee R. Noel
Investigating The Prevalence Of An Insecticide Resistance Gene In Culex Mosquito Populations Of Central Illinois, Kylee R. Noel
Masters Theses
The globalization of society has led to the spread of the vectors, mosquitoes, and diseases. Each year millions of people are killed by diseases vectored by mosquitoes. For example, West Nile Virus alone killed over 2,000 people in North America in 2017; 8 of those deaths being in Illinois. Two prominent vectors of West Nile Virus are Culex pipiens and Culex restuans; which are difficult to differentiate based upon morphological features. In this study, mosquitoes collected from two Illinois counties, Coles County and Champaign County, were first identified based upon morphology and this identification was then compared to probe-based …
Factors Affecting The Spatial Distribution Of Oviposition Sites For Tandem Black Saddlebags Dragonflies (Odonata: Libellulidae), Jessica L. Thornton, Paul V. Switzer
Factors Affecting The Spatial Distribution Of Oviposition Sites For Tandem Black Saddlebags Dragonflies (Odonata: Libellulidae), Jessica L. Thornton, Paul V. Switzer
Faculty Research & Creative Activity
Oviposition site location may be affected by (1) factors influencing the costs and benefits to the offspring (e.g., resource availability, competition, predation risk) and (2) factors influencing the costs and benefits to the female (e.g., predation risk or mate ha- rassment). In cases in which both the male and female are involved in locating a site, costs and benefits may differ for each parent and the resulting oviposition site location may represent the outcome of selection pressures on one or both of them. We studied oviposi- tion behavior in the black saddlebags dragonfly (Tramea lacerata Hagen), a species in which …
Factors Affecting The Spatial Distribution Of Oviposition Sites For Tandem Black Saddlebags Dragonflies (Odonata: Libellulidae), Jessica Thornton, Paul Switzer
Factors Affecting The Spatial Distribution Of Oviposition Sites For Tandem Black Saddlebags Dragonflies (Odonata: Libellulidae), Jessica Thornton, Paul Switzer
Faculty Research & Creative Activity
Oviposition site location may be affected by (1) factors influencing the costs and benefits to the offspring (e.g., resource availability, competition, predation risk) and (2) factors influencing the costs and benefits to the female (e.g., predation risk or mate ha- rassment). In cases in which both the male and female are involved in locating a site, costs and benefits may differ for each parent and the resulting oviposition site location may represent the outcome of selection pressures on one or both of them. We studied oviposi- tion behavior in the black saddlebags dragonfly (Tramea lacerata Hagen), a species in which …
Male-Male Mounting And The Unreliability Of Body Size As A Character For Mate Choice In Male Japanese Beetles (Popillia Japonica Newman), Paul Switzer, Patrick Forsythe, Kipp Kruse
Male-Male Mounting And The Unreliability Of Body Size As A Character For Mate Choice In Male Japanese Beetles (Popillia Japonica Newman), Paul Switzer, Patrick Forsythe, Kipp Kruse
Faculty Research & Creative Activity
Background: Same-sex pairing is common in many animal species. In many insects, same-sex pairing is often thought to be a result of poor sexual discrimination (i.e., a mistake), but few detailed studies of the mechanisms underlying the mistaken pairing have been conducted. Previous studies have found that in the field, a small proportion of Japanese beetle (Popillia japonica) mating pairs consist of two males instead of a male and a female. In the current study, we investigated the relationship between body size, the tendency to mount other males, and the duration of these mounts, in laboratory experiments on male Japanese …
Effectiveness Of Hand Removal For Small-Scale Management Of Japanese Beetles (Coleoptera: Scarabaeidae), Paul V. Switzer, Ryan M. Cumming
Effectiveness Of Hand Removal For Small-Scale Management Of Japanese Beetles (Coleoptera: Scarabaeidae), Paul V. Switzer, Ryan M. Cumming
Faculty Research & Creative Activity
Hand removal is often recommended as a method for small-scale control of Japanese beetles (Popillia japonica Newman). In this study, we investigated the effectiveness of daily hand removal for controlling damage by Japanese beetles on grape plants. We also investigated whether the timing of the removal (at 0800, 1400, or 1900 hours, or at all 3 periods) inßuenced the effectiveness of the technique. We found that hand removal signiÞcantly lowered the number of beetles on, and consequently the damage to, grape plants relative to nonremoval controls. Of the single removal treatments, removal of beetles at 1900 hours was most effective, …
Male-Male Mounting And The Unreliability Of Body Size As A Character For Mate Choice In Male Japanese Beetles (Popillia Japonica Newman), Paul V. Switzer, Patrick S. Forsythe, Kipp C. Kruse
Male-Male Mounting And The Unreliability Of Body Size As A Character For Mate Choice In Male Japanese Beetles (Popillia Japonica Newman), Paul V. Switzer, Patrick S. Forsythe, Kipp C. Kruse
Faculty Research & Creative Activity
Background: Same-sex pairing is common in many animal species. In many insects, same-sex pairing is often thought to be a result of poor sexual discrimination (i.e., a mistake), but few detailed studies of the mechanisms underlying the mistaken pairing have been conducted. Previous studies have found that in the field, a small proportion of Japanese beetle (Popillia japonica) mating pairs consist of two males instead of a male and a female. In the current study, we investigated the relationship between body size, the tendency to mount other males, and the duration of these mounts, in laboratory experiments on male Japanese …
Effectiveness Of Hand Removal For Small-Scale Management Of Japanese Beetles (Coleoptera: Scarabaeidae), Paul Switzer, Ryan Cumming
Effectiveness Of Hand Removal For Small-Scale Management Of Japanese Beetles (Coleoptera: Scarabaeidae), Paul Switzer, Ryan Cumming
Faculty Research & Creative Activity
Hand removal is often recommended as a method for small-scale control of Japanese beetles (Popillia japonica Newman). In this study, we investigated the effectiveness of daily hand removal for controlling damage by Japanese beetles on grape plants. We also investigated whether the timing of the removal (at 0800, 1400, or 1900 hours, or at all 3 periods) inßuenced the effectiveness of the technique. We found that hand removal signiÞcantly lowered the number of beetles on, and consequently the damage to, grape plants relative to nonremoval controls. Of the single removal treatments, removal of beetles at 1900 hours was most effective, …
The Role Of Landmarks In Territory Maintenance By The Black Saddlebags Dragonfly, Tramea Lacerata, Jeffrey Lojewski
The Role Of Landmarks In Territory Maintenance By The Black Saddlebags Dragonfly, Tramea Lacerata, Jeffrey Lojewski
Masters Theses
Territoriality can reduce competition for resources, but territorial defense can be costly. Therefore any behavior that reduces territorial costs may increase the net benefit of territoriality. Some species will align their territory boundaries with conspicuous landmarks that may serve to reduce defense costs. Dragonflies, including black saddlebags (Tramea lacerata), defend territories at breeding sites, keeping rival males away to allow themselves access to females. We used three treatments to investigate whether T. lacerata used landmarks: constraining landmarks (an object that provided a physical barrier to flight), non-constraining landmarks (an object of the same dimensions and construction that did …
Examining The Causes Of Rarity For The Odonata Of Illinois, Miranda R. White, Paul V. Switzer
Examining The Causes Of Rarity For The Odonata Of Illinois, Miranda R. White, Paul V. Switzer
Faculty Research & Creative Activity
Odonata (dragonflies and damselflies) play an important role in habitat management and conservation, but our understanding of the causes of commonness versus rarity in this group is limited. In this study we examined the causes of rarity for the Odonata of Illinois. Using S-ratings for conservation status and published habitat classifications for Illinois odonates, we investigated whether habitat type (lotic versus lentic) or habitat specificity (whether they were limited to a specific type of aquatic habitat) was related to commonness. We found that lotic species and habitat specialists were more likely to be rare than lentic and generalist species. More …
Examining The Causes Of Rarity For The Odonata Of Illinois, Miranda White, Paul Switzer
Examining The Causes Of Rarity For The Odonata Of Illinois, Miranda White, Paul Switzer
Faculty Research & Creative Activity
Odonata (dragonflies and damselflies) play an important role in habitat management and conservation, but our understanding of the causes of commonness versus rarity in this group is limited. In this study we examined the causes of rarity for the Odonata of Illinois. Using S-ratings for conservation status and published habitat classifications for Illinois odonates, we investigated whether habitat type (lotic versus lentic) or habitat specificity (whether they were limited to a specific type of aquatic habitat) was related to commonness. We found that lotic species and habitat specialists were more likely to be rare than lentic and generalist species. More …
A New Species Of Saphonecrus (Hymenoptera, Cynipoidea) Associated With Plant Galls On Castanopsis (Fagaceae) In China, Zhiwei Liu, Xiao-Hui Yang, Dao-Hong Zhu, Yi-Yuan He
A New Species Of Saphonecrus (Hymenoptera, Cynipoidea) Associated With Plant Galls On Castanopsis (Fagaceae) In China, Zhiwei Liu, Xiao-Hui Yang, Dao-Hong Zhu, Yi-Yuan He
Faculty Research & Creative Activity
A new cynipid species, Saphonecrus hupingshanensis Liu, Yang, et Zhu, sp. nov. (Hymenoptera: Cynipidae: Synergini), is described from China. This is the first species of the inquilinous tribe Synergini ever known to have an association with chinquapins (Fagaceae: Castanopsis). The biology and implication to species diversity of Cynipidae in eastern and southeast Asia are discussed.
A New Species Of Saphonecrus (Hymenoptera, Cynipoidea) Associated With Plant Galls On Castanopsis (Fagaceae) In China, Zhiwei Liu, Xiao-Hui Yang, Dao-Hong Zhu, Yi-Yuan He
A New Species Of Saphonecrus (Hymenoptera, Cynipoidea) Associated With Plant Galls On Castanopsis (Fagaceae) In China, Zhiwei Liu, Xiao-Hui Yang, Dao-Hong Zhu, Yi-Yuan He
Faculty Research & Creative Activity
A new cynipid species, Saphonecrus hupingshanensis Liu, Yang, et Zhu, sp. nov. (Hymenoptera: Cynipidae: Synergini), is described from China. This is the first species of the inquilinous tribe Synergini ever known to have an association with chinquapins (Fagaceae: Castanopsis). The biology and implication to species diversity of Cynipidae in eastern and southeast Asia are discussed.
Physiological Status Of Male And Female Popillia Japonica (Coleoptera: Scarabaeidae) Affects Mating And Grouping Behavior, Natasha Tigreros, Rashmi Jadhav, Katelyn A. Kowles, Britto P. Nathan, Paul Switzer
Physiological Status Of Male And Female Popillia Japonica (Coleoptera: Scarabaeidae) Affects Mating And Grouping Behavior, Natasha Tigreros, Rashmi Jadhav, Katelyn A. Kowles, Britto P. Nathan, Paul Switzer
Faculty Research & Creative Activity
Because mating may be costly, sexually active males or females are predicted to be in relatively good physiological condition and may preferentially direct their mating behavior toward relatively high-quality mates. We tested this hypothesis in Japanese beetles (Popillia japonica Newman), a pest species in which males and females may be either isolated or in aggregations while feeding on host plants. We examined male size and lipid content and female size and egg load with respect to both their pairing status and whether they were isolated or in aggregations. Males that were paired had the highest lipid levels, and single, isolated …
Physiological Status Of Male And Female Popillia Japonica (Coleoptera: Scarabaeidae) Affects Mating And Grouping Behavior, Natasha Tigreros, Rashmi Jadhav, Katelyn Kowles, Britto Nathan, Paul Switzer
Physiological Status Of Male And Female Popillia Japonica (Coleoptera: Scarabaeidae) Affects Mating And Grouping Behavior, Natasha Tigreros, Rashmi Jadhav, Katelyn Kowles, Britto Nathan, Paul Switzer
Faculty Research & Creative Activity
Because mating may be costly, sexually active males or females are predicted to be in relatively good physiological condition and may preferentially direct their mating behavior toward relatively high-quality mates. We tested this hypothesis in Japanese beetles (Popillia japonica Newman), a pest species in which males and females may be either isolated or in aggregations while feeding on host plants. We examined male size and lipid content and female size and egg load with respect to both their pairing status and whether they were isolated or in aggregations. Males that were paired had the highest lipid levels, and single, isolated …
Behavioral Explanations Underlying The Lack Of Trap Effectiveness For Small-Scale Management Of Japanese Beetles (Coleoptera: Scarabaeidae), Paul V. Switzer, Patrick C. Enstrom, Carissa A. Schoenick
Behavioral Explanations Underlying The Lack Of Trap Effectiveness For Small-Scale Management Of Japanese Beetles (Coleoptera: Scarabaeidae), Paul V. Switzer, Patrick C. Enstrom, Carissa A. Schoenick
Faculty Research & Creative Activity
Traps containing a combination floral and synthetic pheromone lure are used to monitor and manage Japanese beetles, Popillia japonica Newman (Coleoptera: Scarabaeidae). One key factor limiting trap effectiveness for beetle control is the "trap spillover" phenomenon, in which the trap attracts beetles without capturing them, resulting in increased damage to surrounding host plants. We investigated the mechanisms underlying trap spillover by conducting two studies in a soybean field in east central Illinois. In the first study, we set up trap stations for 1 d and compared the sex, size, and egg load (for females) of beetles caught in the traps …
Behavioral Explanations Underlying The Lack Of Trap Effectiveness For Small-Scale Management Of Japanese Beetles (Coleoptera: Scarabaeidae), Paul Switzer, Patrick Enstrom, Carissa Schoenick
Behavioral Explanations Underlying The Lack Of Trap Effectiveness For Small-Scale Management Of Japanese Beetles (Coleoptera: Scarabaeidae), Paul Switzer, Patrick Enstrom, Carissa Schoenick
Faculty Research & Creative Activity
Traps containing a combination floral and synthetic pheromone lure are used to monitor and manage Japanese beetles, Popillia japonica Newman (Coleoptera: Scarabaeidae). One key factor limiting trap effectiveness for beetle control is the "trap spillover" phenomenon, in which the trap attracts beetles without capturing them, resulting in increased damage to surrounding host plants. We investigated the mechanisms underlying trap spillover by conducting two studies in a soybean field in east central Illinois. In the first study, we set up trap stations for 1 d and compared the sex, size, and egg load (for females) of beetles caught in the traps …
Environmental Conditions Affect Sperm Competition Risk In Japanese Beetles (Coleoptera: Scarabaeidae), Paul Switzer, Carissa Schoenick, Patrick Enstrom
Environmental Conditions Affect Sperm Competition Risk In Japanese Beetles (Coleoptera: Scarabaeidae), Paul Switzer, Carissa Schoenick, Patrick Enstrom
Faculty Research & Creative Activity
Males of many species guard their mates to prevent rivals from usurping paternity of the potential offspring. Environmental conditions, such as temperature, may affect a male’s ability to guard a female effectively and consequently the amount of sperm competition that occurs. We tested whether temperature and light affected mating behavior in laboratory experiments on the Japanese beetle, Popillia japonica Newman, a species in which males guard females for minutes to many hours after mating. When tested in groups, under conditions of high temperature and high light, males guarded females for shorter periods of time and males and females both mated …