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How Potassium Affects Emergence Of Five Supersweet Corn (Zea Mays L. Var. Rugosa) Cultivars With Low Temperatures, Nombasa Tsengwa

Masters Theses

Supersweet types of sweet corn (Zea mays L. var rugosa) are sensitive to low temperature during emergence and thus have difficulty in establishing stands in early spring. This study investigated how banded potash affected establishment of five supersweet cultivars of sweet corn in fields and growth chambers.

In the field, sweet corn cultivars were planted near Urbana, Il on April 18 and July 22, 1991 with three levels of potash (0, 45 and 90 kg/ha) banded at planting. Several parameters of growth and development were measured approximately 2, 4 and 6 weeks after planting. No significant effect of potash was …

The Effect Of Various Plant Growth Regulators On Rough Turf At Coles County Airport, Jay C. A. Harnack

Masters Theses

A field test was conducted to determine the effectiveness of various concentrations of selected plant growth regulators. All PGR's were applied at various rates and combinations on rough turf at Coles County Airport, Charleston, Illinois.

The dominant grasses in the test site were bluegrass (Poa pratensis Huds.) and fescue (Poa pratensis L.).

The plant growth regulators were evaluated at regular intervals for the reduction of biomass, reduction of height, seedhead suppression, and color relative to control.

One third ounce per acre Escort in combination with 4 ounces per acre Embark was the most effective in reducing biomass accumulation followed by …

Mechanisms Controlling Tolerance Of Lettuce Seed To High Temperatures At Germination And Emergence, Margaret A. Mnichowicz

Masters Theses

Lettuce (Lactuca sativa L.) seed germination is inhibited when temperatures are higher than 25-30 C. The extent of this thermodormancy is affected by both genetic and environmental factors. Lettuce seed of four seedlots of "Empire" produced in the summers and winters of two years were sown in the field in late summer and early fall at Yuma, AZ to determine stand establishment with high soil temperatures. The seedlots produced in the summer had higher percent field emergence than those produced in the winter. Also, seed of these four seedlots were germinated in petri dishes in a growth chamber at 20, …

The Bryophytes Of Knox County, Illinois, Kurtis J. Cecil

Masters Theses

Field and herbarium studies conducted over an eleven month period found 84 taxa of bryophytes in Knox County. Included in this list are one hornwort (Class Anthocerotae), 15 liverworts (Class Hepaticae), and 68 mosses (Class Musci). Eighty-two species are new county records. Six previously unreported taxa produced during herbarium studies and one previous report were not relocated in the field. An annotated list provides collection data, location of voucher, and frequency of those species located in Knox County. A presettlement vegetation map is included to illustrate the location of collection sites.

The Market Medicinal Plants Of Monterrey, Nuevo Leon, Mexico, Michael S. Nicholson

Masters Theses

The primary purpose of this study was to record the popular uses of various medicinal plants gathered in the vicinity of Monterrey, Mexico.

Two hundred medicinal plant specimens were collected from 11 hierberias of two mercados and two additional medicinal plant sources. Included is a total of 92 species in 86 genera of 50 plant families.

The plant vendors at the hierberias were interviewed to determine the folk uses of the plants. The reports were reviewed in the literature for comparison with previously published citations. Collections are retained in the Ethnobotanical Herbarium, Room 107, Klehm Hall, Eastern Illinois University along …