Scholarship & Research
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Item Physico-chemical studies on the epicuticle of the two-striped grasshopper, Melanoplus bivittatus Say(Montana State University - Bozeman, College of Agriculture, 1949) Chefurka, WilliamItem Sex ratio studies on the wheat stem sawfly, Cephus Cinctus Nort(Montana State University - Bozeman, College of Agriculture, 1950) McGinnis, Arthur JamesItem Oviposition of the wheat stem sawfly (Cephus cinctus, Nort.) with special reference to some morphological characteristics of vulgare wheats(Montana State University - Bozeman, College of Agriculture, 1955) Kreasky, Joseph B.Item Laboratory fecundity and development, field population dynamics, pupal predation and the history of releases of the spurge hawkmoth, Hyles euphorbiae (L.), a biological control agent of leafy spurge, Euphorbia esula L., in Montana(Montana State University - Bozeman, College of Agriculture, 1988) Poritz, Noah HollemanItem Influences of ungulate carcasses on Coleopteran communities in Yellowstone National Park, USA(Montana State University - Bozeman, College of Agriculture, 1994) Sikes, Derek ScottItem Effect of Tagetes minuta on the plant parasitic southern root-knot nematode, Meloidogyne incognita, sugarbeet cyst nematode, Heterodera schachtii and nontarget aquatic macroinvertebrates(Montana State University - Bozeman, College of Agriculture, 1999) Kumar, AnujItem The Methiini of the West Indies with notes on circum-Caribbean Methia (Coleoptera : Cerambycidae)(Montana State University - Bozeman, College of Agriculture, 1990) Philips, Thomas KeithItem A faunal survey of the elateroidea of Montana(Montana State University - Bozeman, College of Agriculture, 1993) Seibert, Catherine ElaineItem A study of Urophora affinis (Diptera : Tephritidae) released on spotted knapweed in Western Montana(Montana State University - Bozeman, College of Agriculture, 1976) Story, Jim MaynardItem Seasonal and spatial patterns of mortality and sex ratio in the alfalfa leafcutting bee, Megachile rotundata (F.)(Montana State University - Bozeman, College of Agriculture, 2004) O'Neill, Ruth Pettinga; Chairperson, Graduate Committee: Sue Blodgett.Nests from five seed alfalfa sites of the alfalfa leafcutting bee Megachile rotundata (F.) were monitored over the duration of the nesting season in 2000 and 2001, from early July through late August. Cells containing progeny of known age and known position within the nest were subsequently analyzed for five commonly encountered categories of pre-diapause mortality in this species. Chalkbrood and pollen ball had the strongest seasonal relationships of mortality factors studied. Chalkbrood incidence was highest in early-produced cells. Pollen ball was higher in late-season cells. Chalkbrood, parasitism by the chalcid Pteromalus venustus, and death of older larvae and prepupae , due to unknown source(s) exhibited the strongest cell-position relationships. Both chalkbrood and parasitoid incidence were highest in the inner portions of nests. The “unknown” category of mortality was highest in outer portions of nests. Sex ratio was determined for a subset of progeny reared to adulthood. The ratio of females to males is highest in cells in inner nest positions. Sex ratio is female-biased very early in the nesting season, when all cells being provisioned are the inner cells of nests, due to the strong positional effect on sex ratio.