Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"herbaceous perennial"”.
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The use of chemicals in the control of certain herbaceous perennial weeds
LD2668 .T4 1954 S99
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Use of Plant Growth Regulators to Improve Branching of Herbaceous Perennial Liners
… PGRs to improve branching during production of herbaceous perennial liners and finished plants. The effects of benzyladenine (BA) on the branching and root and shoot growth of Agastache Clayt. Ex Gronov. 'Purple Haze', Gaura lindheimeri Engelm. & A. Gray 'Siskiyou Pink', Lavandula × intermedia …
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An Investigation of Hexatylis Contracta Blomquist (Southern Heartleaf): Individuals, Hybrids, Populations and Species
<p>Hexastylis contracta Blomquist is a rare herbaceous perennial plant endemic to southeastern North America. The plant exhibits a disjunct distribution, being found on the Cumberland Plateau of Tennessee and Kentucky and also 300 km east in the Blue Ridge Mountains of North Carolina. This plant …
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The Ecology of Sexual and Apomictic Reproduction in Antennaria Parlinii Gaertner (Apomixis, Plant Breeding Systems, Evolution)
… and competitive ability are compared in an herbaceous perennial, Antennaria parlinii, in which seed production occurs in plants that are either sexual and dioecious or apomictic. Studies of seedlings and ramet production by adult plants in natural populations documented differences in …
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Photosynthesis and nutrition in In Vitro plants
The successful micropropagation of woody or herbaceous perennial plants is often limited by large losses which occur as plants are transferred from culture to soil. Poor photosynthetic capability may be partly responsible for losses at this stage. Results show that growth irradiance, CO 2 and …
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Distribution and Soil Characteristics Associated with the Neches River Rose-Mallow (Hibiscus dasycalyx)
… <em>Hibiscus dasycalyx</em>, is a rare herbaceous perennial endemic to East Texas. The threatened, obligate wetland species is currently at risk of being lost in the wild due to habitat loss, encroachment of nonnative and native plant species, and hybridization with two other Hibiscus …
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Assessment of genetic variations within and between populations of Marama Bean (Tylosema Esculentum (Burchell) Schreiber) based on Microsatellites (SSRS) and Intergenic spacer length variation markers in the Namibian germplasm
Tylosema esculentum (Burchell) L. Schreiber is a herbaceous perennial drought tolerant legume that is endemic to the arid and semi-arid zones of southern Africa. Its agronomic potential is on the basis of its seed's nutritional composition that is comparable with soybean and peanut, the two mostly …
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Management Strategies for Hop Downy Mildew Utilizing Fungicides and Host Resistance
Hop (Humulus lupulus L.) is an herbaceous perennial plant species that is native to the Northern hemisphere. The hop inflorescences are utilized during the production of beer. Commercial production of hops requires the use of fungicides and host resistance to retain high overall yields and quality …
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Approaches to wildflower meadow establishment
… meadow establishment using native Virginia herbaceous perennial species were investigated. The initial task lay in identifying the truly native species from those European introductions which have successfully naturalized in the state. Germination testing was conducted in accordance with …
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Nutrition and Plant Growth Regulator Rates for High Quality Growth of Containerized Spiderwort (Tradescantia virginiana L.)
… (Tradescantia virginiana) is a flowering herbaceous perennial. Little information is available about its production requirements. This project’s purpose was to determine fertilizer and PGR rates for high quality growth of Spiderwort in a greenhouse production setting. The first experiment …
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Assessing the effects of invasive Ligustrum sinense and Lonicera japonica on rare and federally threatened Scutellaria montana
… Chapm. (large -flowered skullcap) is a rare herbaceous perennial endemic to southeastern Tennessee and northwestern Georgia. The forest understory habitat in which S. montana typically occurs often also contains invasive Ligustrum sinense (Chinese privet) and Lonicera japonica (Japanese …
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Vegetation response of a Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) community to 6 mechanical treatments in Rich County, Utah
… has been recognized. The historical removal of herbaceous species by excessive and uncontrolled livestock grazing on many of our sagebrush ecosystems has resulted in a stagnant state where dense, competitive stands of sagebrush prevent herbaceous species from recovering. Most early research on …
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Seed Dispersal of Wild Peony (Paeonia brownii): as seed in the pouch is worth two in the pod
… for wild peony (Paeonia brownii), an herbaceous perennial that produces large seeds and is found in Jeffrey pine forests at elevations between 1950-2000 m and in sagebrush scrub at elevations between 1550-1580 m in the mountain ranges of western Nevada. Wild peony appears to follow a …
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The Investigation of the Soil Seedbank in a Long-term Mowing and Fertilization Experiment
… while the mowed plots are dominated by herbaceous perennial species. Long-term fertilization and drainage have also altered the species composition of the aboveground plant community, with these treatments causing a decrease in species richness. We collected soil samples from each plot …
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Controlling Growth in Echinacea Hybrids
New hybrid Echinacea cultivars, based on crosses of Echinacea purpurea (L.) Moench with several other Echinacea species, have generated interest and excitement in the marketplace due to novel flower colors and forms. However, these cultivars vary significantly in their growth habits and …
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THE ANTAGONISTIC AND MUTUALISTIC PLANT-INSECT INTERACTIONS OF PITCHER’S THISTLE (CIRSIUM PITCHERI [TORR. EX EAT.] TORR. & A. GRAY, ASTERACEAE), A FEDERALLY THREATENED GREAT LAKES DUNE AND COBBLE SHORE ENDEMIC PLANT
… pitcheri (Asteraceae). Pitcher's thistle is an herbaceous perennial monocarpic plant with no means of vegetative reproduction, relying solely on seed set for population persistence. The seed head weevil is univoltine and lays eggs in thistle heads. The developing larva chews the ovules or seeds …