Theses and Dissertations at Montana State University (MSU)
Permanent URI for this collectionhttps://scholarworks.montana.edu/handle/1/733
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Item The millipede of Santo Antao, Spinotarsus caboverdus : survey for pathogenic microorganisms, bioassay tests of fungal pathogens against S. caboverdus and Melanoplus sanguinipes(Montana State University - Bozeman, College of Agriculture, 1994) Brito, Jorge MendesItem Isozyme analysis of Paecilomyces farinosus and Paecilomyces fumosoroseus (Deuteromycotina: Hypomycetes), two potential biological control agents of the sweet potato and silverleaf whiteflies (Bemisia spp.)(Montana State University - Bozeman, College of Agriculture, 1995) Bunnell, Joseph E.Item Temperature-sensitive Beauveria bassiana mycosis in the Mormon cricket, Anabrus simplex(Montana State University - Bozeman, College of Agriculture, 1998) Turnbow, Jonathan HunterItem Pathogenicity of Vairimorpha sp. (Nosematidae: Microsporida) in the Mormon cricket, Anabrus simplex (Tettigoniidae: Orthoptera)(Montana State University - Bozeman, College of Agriculture, 1991) Currey, David MichaelItem Sustainable use of neem in Malian villages(Montana State University - Bozeman, College of Agriculture, 1998) Jenkins, David A.Item Thermal biology of the lesser grain borer Rhyzopertha dominica (F.) (Bostrichidae) and the warehouse pirate bug Xylocoris flavipes (Reuter) (Anthocoridae)(Montana State University - Bozeman, College of Agriculture, 2002) Campbell, Tracy Lynn MummItem Integration of Nosema locustae with chemical insecticides and entomopoxvirus for control of grasshoppers(Montana State University - Bozeman, College of Agriculture, 1980) Mussgnug, Gerald LouisItem Aphelinus sp. nr. varipes (Hymenoptera: Aphelinidae) as a potential biological control agent of Russian wheat aphid Diuraphis noxia (Mordvilko) (Homoptera: Aphididae)(Montana State University - Bozeman, College of Agriculture, 1991) Lajeunesse, Sherry E.Item Genetic and behavioral variability in the ovary-feeding Nitidulid Brachypterolus pulicarius collected from Dalmatian and yellow toadflax(Montana State University - Bozeman, College of Agriculture, 2002) Hering, Kelly Lynn; Chairperson, Graduate Committee: David K. WeaverBraychypteroluspulicarius is an ovary-feeding beetle in the family Nitidulidae. The species is found on Dalmatian and yellow toadflax, two non-native, invasive weeds. The beetle is native to Eurasia and is considered an important natural enemy and biological control agent for toadflax. Because B. pulicarius is found, at varying densities, on both yellow toadflax and Dalmatian toadflax, questions have been raised about the potential existence of host races in the species. Amplified fragment length polymorphism (AFLP) molecular genetic techniques are commonly used in studies of population genetics. Because it is a relatively easy and reliable method that does not require previous knowledge about the beetles’ genome, the AFLP technique was utilized to examine the patterns of variability of populations ofB. pulicarius. Patterns of observed variability that corresponded with commonality of host plant could serve as evidence for host races in B. pulicarius. Insects were collected from both yellow and Dalmatian toadflax at a total of 12 locations in the northwestern US, British Columbia, and Europe. Volatile collections were made from host plants to characterize their chemical emissions and to look for species-specific plant differences. Behavioral assays were attempted to determine if beetles showed a preference for the species of host plant from which they were collected. Volatile collections revealed variability in volatile production within and between host plant species. Behavioral trials were highly variable and preference results were not obtained. AFLP analyses revealed variation that did not correspond to host plant commonality. Overall, the study revealed the dynamic nature and a high level of uncertainty surrounding the fundamental knowledge of this biological system. No evidence was found for host race existence in B. pulicarius. Alternative explanations for the observed variabilities are discussed.Item Vertical transmission of a dimorphic microsporidium (Microspora) in the Mormon cricket, Anabrus simplex (Orthoptera: Tettigoniidae)(Montana State University - Bozeman, College of Agriculture, 1993) Djibode, Francoise