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Articles 1 - 7 of 7
Full-Text Articles in Entomology
Rapid Molecular Detection And Population Genetics Of Pityophthorus Juglandis, A Vector Of Thousand Cankers Disease In Juglans Spp., Emel Oren
Masters Theses
Thousand Cankers Disease (TCD) is a disease complex involving the fungal pathogen Geosmithia morbida, an insect vector Pityophthorus juglandis, and the hosts, Juglans spp. and Pterocarya spp. Signs and symptoms of TCD include crown thinning due to branch dieback, yellowing and wilting of the leaves, appearance of epicormic shoots, numerous entrance/exit holes, gallery formation by P. juglandis, and the development of small, dark brown cankers underneath the bark. TCD originally described from western U.S., has now expanded to eastern U.S. and northwestern Italy. The disease complex is often difficult to diagnose due to the absence of symptoms …
Improving Aedes Mosquito Surveillance And La Crosse Virus Screening In Eastern Tennessee, Cassandra Urquhart
Improving Aedes Mosquito Surveillance And La Crosse Virus Screening In Eastern Tennessee, Cassandra Urquhart
Masters Theses
La Crosse virus (LACV), transmitted by infected Aedes triseriatus, Ae. albopictus, and Ae. japonicus mosquitoes is the leading cause of pediatric arboviral encephalitis. Severe cases of LAC encephalitis occur in individuals 16-years-old or younger and may cause permanent neurological damage or fatality. No vaccines exist making mosquito control and disease prevention crucial to public health. Effective screening and surveillance practices are key components to these goals. While a number of standard mosquito surveillance methods exist, continuous testing and improved understanding of vector biology to determine the best ways to implement these methods is important. Additionally, the current standard …
Soil-Water Transport Of A Seed Coated Neonicotinoid Pesticide In Soybean/Maize Cultivation Systems, Geoffrey Nathaniel Duesterbeck
Soil-Water Transport Of A Seed Coated Neonicotinoid Pesticide In Soybean/Maize Cultivation Systems, Geoffrey Nathaniel Duesterbeck
Masters Theses
The current decline of the honey bee (Apis mellifera L.) and other beneficial pollinator species is well documented. Several causes have been cited in this decline including: pathogens, pests, nutrition, and pesticide exposure. Since the advent of the neonicotinoid family of pesticides in the 1990’s an increase in honey bee colony loss has been observed. Neonicotinoid pesticides are commonly applied as a seed treatment to cotton, soybean and maize row crops. As the seed germinates, it absorbs the pesticide from the coating then spreads systemically throughout the entire plant. However, a large portion of the seed coating may stay …
An Ecological Study Of The Kudzu Bug In East Tennessee: Life History, Seasonality, And Phenology, Kadie Elizabeth Britt
An Ecological Study Of The Kudzu Bug In East Tennessee: Life History, Seasonality, And Phenology, Kadie Elizabeth Britt
Masters Theses
The kudzu bug, Megacopta cribraria (Hemiptera: Plataspidae), an invasive species from Asia, was first discovered in the United States in 2009 in Georgia. It has since spread to other states, including Tennessee, where it has spread rapidly to numerous counties in four years. Its common name, kudzu bug, implies a potential benefit to management of the invasive species kudzu; unfortunately, the kudzu bug has shown little impact on reducing growth of kudzu. The kudzu bug causes agricultural, urban, and health-related concerns in the United States. Soybean losses by kudzu bug have exceeded 20% in some areas of the southeastern United …
Evaluation Of Total Mercury And Methylmercury Concentrations Of Terrestrial Invertebrates Along Lower East Fork Poplar Creek In Oak Ridge, Tennessee, Chelsea Lynden Standish
Evaluation Of Total Mercury And Methylmercury Concentrations Of Terrestrial Invertebrates Along Lower East Fork Poplar Creek In Oak Ridge, Tennessee, Chelsea Lynden Standish
Masters Theses
Mercury (Hg) and methylmercury (MeHg) are environmental concerns due to their abilities to cause neurological, reproductive, and other physical damage to wildlife. Lower East Fork Poplar Creek (LEFPC), stemming from the Y-12 National Security Complex, located in Oak Ridge, TN, has elevated concentrations of inorganic mercury, a majority of which was released between 1950 and 1963. This inorganic mercury has been, and is currently, converted to methylmercury. An ecological assessment in 2011 revealed high concentrations of methylmercury in riparian spiders along LEFPC. These results suggested the transfer of mercury from aquatic to terrestrial systems may be higher than previously expected …
Effectiveness Of Entomopathogenic Nematode-Induced Systemic Resistance Against Pests And Pathogens Of Tobacco And Soybeans In Tennessee, Julia Grace Ferguson
Effectiveness Of Entomopathogenic Nematode-Induced Systemic Resistance Against Pests And Pathogens Of Tobacco And Soybeans In Tennessee, Julia Grace Ferguson
Masters Theses
Entomopathogenic nematodes (EPNs) Steinernema and Heterorhabditis are currently used as biological control agents in multiple cropping systems. EPNs also have been shown to induce resistance in some treated plant species, such as tomatoes and hostas. Recent studies where EPNs are applied to the soil have shown reduction in the number of plant parasitic nematodes and foliar nematodes. Other studies have also shown reduction in development of above-ground chewing and sucking insect pests as well as a pathogen. However, the mechanisms that cause these reductions are poorly understood. This research hypothesized that EPNs could induce resistance in tobacco and soybean plants. …
Variations In The Invertebrate Communities Of Wild Cape Cod Cranberry Bogs, Barbara Wagner
Variations In The Invertebrate Communities Of Wild Cape Cod Cranberry Bogs, Barbara Wagner
Masters Theses
As a species domesticated only in the last century, agricultural cranberry plants (Vaccinium macrocarpon) remain little removed from their wild relatives. Thus, it is a potential model species for studies of the earliest stages of domestication; however, there is little available quantitative information on its wild population biology and ecology. As such information is vital to studies of the ecological changes occurring during domestication, the purpose of this study was to consolidate the relevant knowledge available and conduct a preliminary search for patterns in the invertebrate communities of wild bogs. The alpha diversity was found to be greater …