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The Black Flies (Simuliidae:Diptera) Of The Great Smoky Mountain National Park And Vicinity, Sitan Traore

Masters Theses

Larval black flies were collected monthly from four selected streams in the Great Smoky Mountains National Park between June 1991 and July 1992. One large size (13 m wide Little River), one small (1m wide Tipton Place) and two medium sized streams, one in the sun (6.45 m wide Mill Creek site #1) and one in the shade (6m wide Mill creek site #2) streams and additional creeks in Knox, Monroe, Morgan, Blount counties in eastern Tennessee and Haywood County in western North Carolina will be discussed.

Larvae of Simulium tuberosum (Lundstrom) complex, S. venustum/ verecundum Say, S. quebecense Twinn, …

The Role Of Fire In The Regeneration Of Table Mountain Pine In The Southern Appalachian Mountains, Gregory L. Sanders

Masters Theses

Table Mountain pine (Pinus pungens Lam.) is highly intolerant, serotinous-coned species endemic to the Appalachian Mountains. Before it can successfully be regenerated, three conditions must occur--(1) heat must be present to open its serotinous cones, (2) seed must fall on mineral soil, and (3) the existing forest canopy must be removed in to expose seedlings to full sunlight. These conditions are only met in the advent of fire.

This study was conducted in stands of Table Mountain pine that were burned by wildfires to see which burning conditions best regenerate the species. It showed that the best regeneration occurred …

Evaluation Of Puccinia Convolvuli (Pers.) Cast. As A Biological Control Of Calystegia Sepium (L.) R. Br., Jonathan C. Beener

Masters Theses

A rapid detached leaf assay technique was developed to test various pathogens for biological control of hedge bindweed (Calystegia sepium). Detached leaves with complete petiole were excised, surface sterilized in 70% ethanol, washed with sterile distilled water, and placed in sterile petri plates with sterile filter paper moistened with 5ml sterile distilled water. Media, leaf size, temperature and light duration were then tested for conditions that would optimize maximal leaf longevity. The best conditions derived were: 12/12 hrs. light, dark, period, 30°C, sterile distilled water medium and leaves of any size. Twenty-five isolates recovered from bindweed lesions were grown on …

The Effects Of Plant Growth Regulators With The Addition Of A Surfactant On Rough Turf, Jennie Rebecca Chlumsky

Masters Theses

Three plant growth regulators (Embark, Event and Oust) and two surfactants (crop oil and non-ionic surfactant) were evaluated for their effectiveness in controlling the growth of rough turf at Coles County Airport. The PGRs were evaluated for control of turf height, suppression of seedheads, phytotoxicity and weed control at two, four, six and eight weeks after spraying. Embark and Event were applied at a rate of 0.43, 0.64 and 0.86 kg/ha and Oust was applied at a rate of 0.01 and 0.02 kg/ha. The surfactants were applied at 1% of solution. All PGRs were more effective with a surfactant, but …

Leakage Of Solutes From Imbibing Seeds Of Supersweet Corn Cultivars That Differ In Tolerance To Low Germination Temperatures, Linda Kull

Masters Theses

Supersweet types of sweet corn (Zea mays L. var rugosa) with shrunken-2 endosperm are preferred by consumers because of their extra sweetness and postharvest retention of good flavor. However, their acceptance by growers is hindered due to reduced field emergence, especially in cold soils. This reduced emergence is related to seed quality. To examine differences between supersweet corn cultivars which are tolerant and sensitive to low temperatures, two cultivars were chosen based on their emergence in the field at low temperatures (10-15 C). 'Illini Gold' was chosen as the tolerant cultivar and 'Honey'n'Pearl' as the sensitive cultivar. Seeds …

A Biosystematic Study Of Panus Conchatus (Basidiomycetes; Agaricales), James Edward Johnson

Masters Theses

As part of a biosystematic study of Panus conchatus (Bull.: Fr.) Fr., North American and European herbarium specimens from the Field Museum and the University of Michigan were examined and a description of the taxon prepared. Tissue and single spore isolates were obtained from basidiocarps collected in Illinois. Single and polyspore isolates were obtained from a collection made in Switzerland by R. H. Petersen. Culture mat analyses were completed on several media and the taxonomic value of cultural characters assessed. Based on this study, the identification of somatic cultures by cultural characteristics is unlikely. Single spore isolates from the Illinois …