Entomology Masters Theses
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Integrated Pest Management of Soybean Aphid (Aphis glycines) in North Dakota
(North Dakota State University, 2010)The soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), is a major pest of soybean (Glycine max L.). This aphid is a native of Asia and was first discovered in the United States in Wisconsin in July 2000, and ... -
Effects of Soybean Aphid Resistance on the Lady Beetle Harmonia axyridis Mediated by the Soybean Aphid Aphis glycines
(North Dakota State University, 2010)Plants can directly and indirectly influence the natural enemies of their herbivores. Such trophic level effects apply to plants in natural and agronomic settings as well as to plants bred for pest resistance and biological ... -
Impact of Ragl Aphid Resistant Soybeans on Binodoxys communis (Gahan) (Hymenoptera: Braconidae), a Parasitoid of Soybean Aphid Aphis glycines Matsumura (Hemiptera: Aphididae )
(North Dakota State University, 2011)After its discovery in North America during the summer of 2000, the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae) became a major pest of the soybean, Glycine max (L.) Merr., in most soybean growing regions ... -
Thermal Biology, Overwintering, and a Degree-Day Model for the Adult Emergence of the Red Sunflower Seed Weevil (Coleoptera: Curculionidae)
(North Dakota State University, 2022)Red sunflower seed weevil, Smicronyx fulvus LeConte, is a univoltine seed-feeding weevil that is a primary pest of cultivated sunflower, Helianthus annuus, in North America, especially within the upper Great Plains region. ... -
Investigating the Subspecific Designation of Euschistus servus (Say) (Hemiptera: Heteroptera: Pentatomidae) Using a Combined Landmark-Based Geometric Morphometrics Approach
(North Dakota State University, 2021)Euschistus servus is currently subdivided into two subspecies: E. s. servus and E. s. euschistoides. An intergrade population inhabits the central U.S. This study sought to reevaluate the established subspecific designations ... -
Impacts of Microbial Seed Inoculants on Growth of Field Pea (Pisum sativum L.), and Implications for Plant-insect Interactions
(North Dakota State University, 2021)Soil microbes that associate with plant roots can benefit plants by increasing the supply or availability of nutrients to increase the plant’s resilience to abiotic and biotic stress, crop germination rates, root and shoot ... -
Spatiotemporal Dynamics of Butterflies and Their Floral Resources
(North Dakota State University, 2020)Butterflies fulfill a unique role among insect pollinators as long-distance flyers. This makes butterflies particularly valuable as vectors of genetic diversity among spatially isolated plant populations. Like many insects, ... -
Influence of Neonicotinoid Seed Treatment on Two Co-Occuring Arthropod Pests, Two-Spotted Spider Mite (Tetranychus urticae) and Western Flower Thrips (Frankliniella occidentalis)
(North Dakota State University, 2019)Insecticidal neonicotinoid seed treatments in agriculture is a common insect pest management strategy. Seed treatments have systemic and residual toxicity, which are effective against target insect pests. However, effects ... -
The Tingidae (Hemiptera: Heteroptera) of Southern Central America (with an Emphasis on Costa Rica)
(North Dakota State University, 2018)The genera of Tingidae of the neotropics are herein diagnosed and a key for their identification is also provided. Five new genera are described from Central America, two from Panama, two from Costa Rica, and one new genus ... -
Collection and Analysis of Volatiles of Various Cultivated Sunflower, Helianthus Annuus, (Asteraceae) Germplasm and Investigation of Some Aspects of Host Selection in Adult Red Sunflower Seed Weevil, Smicronyx Fulvus L., (Coleoptera Curculionidae)
(North Dakota State University, 2017)Plants of sunflower germplasm putatively resistant or susceptible to the red sunflower seed weevil, Smicronyx fulvus (Coleoptera: Curculionidae) were used to test the hypothesis that the volatile composition of these two ... -
The Effects of Salinity on Herbivorous Pests of Corn and Soybean
(North Dakota State University, 2016)Many environmental factors, including soil characteristics, are critically important for plants, herbivorous arthropods, and their interactions. Despite increasing evidence that soil salinity can drastically impact plants, ... -
Aphid Interactions with Environmental Variation in the Field and Lab
(North Dakota State University, 2015)A basic tenet of ecology is that organisms are affected by both abiotic factors and other organisms; therefore, there is value in understanding interactions in our changing world. Aphids are model organisms for questions ... -
The Effects of Abiotic Climate Change Factors on Aphid Life History and Populations
(North Dakota State University, 2015)While the effects of many abiotic factors associated with climate change have not been extensively studied, work on model organisms is beginning to help predict effects on similar species. Research on climate change has ... -
Exploring Effects of Weed Management in Agroecosystems: Arthropods, Soil Properties and Soybean Production
(North Dakota State University, 2014)Soil-dwelling arthropods contribute to agroecosystems, but it’s unclear how specific taxa respond to weed management practices. Objectives were to explore 1) response of Collembola to weed management in a glyphosate-tolerant ... -
A Faunal Survey of Coleoptera, Hemiptera (Heteroptera), and Lepidoptera Associated with Fraxinus Pennsylvanica Marshall (Oleaceae) in the Red River Valley of Eastern North Dakota
(North Dakota State University, 2014)The emerald ash borer (Agrilus planipennis; EAB) is an invasive wood-boring beetle causing mortality of ash trees in North America. This project was initiated because of the threat of EAB moving into North Dakota. The main ... -
Effect of Larval Diet on Endogenous Carbon Reproductive Resources of Fifth Instars and Adult Females of the Moth, Heliothis Virescens
(North Dakota State University, 2013)Mostly adult Lepidoptera feed on plant nectar. That is, adults can only contribute to carbon, and not nitrogen, acquisition. The moth Heliothis virescens were used to explore the hypothesis that larval nutrition influences ... -
Crop and Prairie Grasses Serving as Hosts for the Hessian Fly
(North Dakota State University, 2012)Insect herbivores typically parasitize a relatively small number of plant species. Host specialization is presumed to be a result of evolutionary arms races, with insect adaptations ultimately restricting host range. Being ... -
Oviposition Preference and Larval Host Range of the Sugarbeet Root Maggot
(North Dakota State University, 2012)The sugarbeet root maggot, Tetanops myopaeformis Röder, is native to North America; however, its main crop host, sugarbeet, Beta vulgaris L., was introduced to the continent from Europe. This study involved an investigation ... -
Pest Management of Wheat Stem Sawfly, Cephus Cinctus Norton (Hymenoptera: Cephidae), in Western North Dakota
(North Dakota State University, 2012)The wheat stem sawfly, Cephus cinctus Norton, is regarded as a major pest of dryland wheat in the Upper Great Plains. For peak emergence of wheat stem sawfly, the most accurate base was 0 C using air temperature, and then ... -
Density and Movement of Soybean Aphid, Aphis Glycines (Hemiptra: Aphididae) in Response to Temperature and Resistant Soybean Plants
(North Dakota State University, 2012)Movement is one way herbivores respond to their host plant, yet the movement of relatively immobile insects has received little attention. We studied how the movement and density of apterous soybean aphids responds to a ...
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