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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 20 of 48 for “"Agrostis"”.
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Development of genetic transformation systems in creeping bentgrass (Agrostis palustris Huds.)
… first step toward improving creeping bentgrass (Agrostis palustris Huds.) via genetic engineering, this study was conducted to develop genetic transformation systems in creeping bentgrass. Establishment of embryogenic cell cultures is a prerequisite for crop improvement via genetic engineering. A …
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From microbiome diversity to endophyte ecology in the wild grass Agrostis capillaris
… associated with the wild grass species Agrostis capillaris, and the interactions between the plant host and its endophytes. Chapter I characterizes the composition and diversity of the fungal and bacterial communities associated with A. capillaris and describes their dynamics in relation …
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Definition of Agrostis palustris leaf health at the time of infection and colonization by Curvularia lunata
The state of leaf health of intact Penneagle creeping bentgrass leaves into which Curvularia lunata was able to ingress was determined by reducing cuticle/wax formation with trichloroacetic acid (TCA) and stressing plants with high air temperatures. Plants were grown until the third leaf had fully …
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Nitrogen and chelated iron fertilization on the growth and physiology of creeping bentgrass (Agrostis palustrus Huds)
Fall-winter and spring-summer fertilizations with chelated iron and nitrogen were evaluated on the growth and physiology of creeping bentgrass. Iron, when applied alone, did not provide a satisfactory turf color during the winter and early spring. However, spring root growth was generally increased …
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The influence of high temperature stress and herbicides on the susceptibility of creeping bentgrass (Agrostis palustris) to Curvularia lunata
… as a primary pathogen of creeping bentgrass (Agrostis palustris) has been debated in the literature for many years. The most recent and most complete evidence indicates that this fungus is a weak pathogen, colonizing only senescing tissues. In the present study, four groups of experiments were …
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Photosynthetic adaptations in grasses to abnormal levels of soil cations
… The main investigative plants belong to the Agrostis genus. Plants were sampled from habitats with soi.ls which provided a range of abnormal levels of cations; mine spoil sites with heavy metal contaminations, calcareous and acidic sites with contrasting levels of cations particularly calcium …
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Crop-water stress index models for cool season turfgrasses
… (Poa pratensis L.) (KB) and creeping bentgrass (Agrostis palustris Huds.) (CB), and (iii) to evaluate the performance of CB when managed under different CWSI models.
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Responses of two grass species to plant growth regulators, fertilizer N, chelated Fe, salinity and water stress
… (Poa praetensis L.) and creeping bentgrass (Agrostis palustris Huds.) to foliar applications of two plant growth regulators (PGR) and/or chelated Fe (Na Fe diethylene triamine pentaacetate). Environmental variables considered were N levels, soil moisture regimes, and saline irrigations. The …
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Creeping bentgrass response to plant growth regulating substances and annual bluegrass competition
Creeping Bentgrass (Agrostis stolonifera var. palustris (Huds.) Farw.) is the most widely used cool-season turf grass used for putting greens in North America. Frequently it becomes invaded with a persistent weed, annual bluegrass (Poa annua L.). Studies were conducted on a predominately annual …
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A Comparative Study of Composted Organic Wastes and IBDU Fertilizer in Nitrogen Utilization by Bentgrass Cultivars
… materials were applied to one cultivars of (Agrostis capillaries) and three cultivars of (A. palustris) at the rate of .S^/IOOO**2 in the months of April, June, and September. The plots were sampled one month after application to evaluate the nitrogen concentration of the leaf and thatch …
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Topdressing and aerification programs on creeping bentgrass fairways
… and aerification for creeping bentgrass(<i>Agrostis stolonifera<i> L.) fairways and the effect that these two cultural practices have on soil physical properties have not been fully assessed. The first objective of this study was to determine the optimum timing of topdressing and …
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Evaluation of bacterial strains for control of dollar spot on creeping bentgrass and brown patch on tall fescue
… agent of dollar spot on creeping bentgrass (Agrostis palustris Huds.); and Rhizoctonia solani Kihn, causal agent of brown patch on tall fescue (Festuca arundinacea Schreb.), are important pathogens of turfgrass. This research evaluated the ability of twenty bacterial strains of the genus …
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Field Measurements of Denitrification From Fertilizer Applied to Turfgrass
… (Poa pratensis L.) or creeping bentrgrass (Agrostis palustris Huds). Atmospheric samples were collected daily (data extrapolated to a 24-h period) for the duration of each experiment and analyzed by mass spectrometric procedures. Data reported indicate that labeled fertilizer N losses from …
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Use of tartrazine dye as a tracer to measure foliar spray retention on turfgrass
… on foliar spray retention on a bentgrass (Agrostis stolonifera L.) golf fairway. For water-based spray mixtures, the results indicated that increasing spray volume decreased foliar recovery to a plateau at around 85%. Compared to flat fan nozzles, air induction nozzles delivered the same …
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Evaluation of Novel Techniques to Control Annual Grasses in Intensively Managed Turfgrass Systems
… smooth crabgrass >80% in creeping bentgrass (Agrostis stolonifera L.) and hybrid bermudagrass turf. Although similar programs also controlled goosegrass, acceptable control required more applications than are allowed on the product label. Targeted application devices (TAD), such as spot …
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Creeping Bentgrass, Kentucky Bluegrass and Tall Fescue Responses to Plant Growth Stimulants Under Deficit Irrigation
… within Virginia. Creeping bentgrass (<i>Agrostis palustris</i> "L93"), Kentucky bluegrass (<i>Poa pratensis </i>"Midnight"), and tall fescue (<i>Festuca arundinacea</i>) Dominion blend were evaluated under deficit irrigation and upon exogenous application of plant growth stimulants (PGS), …
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The Effects of Agrochemicals on Litter Fungi
… and species numbers isolated from leaf litter of Agrostis tenuis, although there were little or no effects with the herbicides at either normal field rate or elevated rates. When applied at a rate three times greater than normal field rate the fungicides drastically reduced the number of species …
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The effects of rapid establishment and subsequent turf quality of agressive grasses seeded with Poa pratensis L
… bluegrass, because of frayed leaf tips. Redtop (Agrostis alba L.) and creeping red fescue (Festuca rubra L.) were less competitive to bluegrass than the ryegrasses, but they provided little advantage in ground cover; however, turf quality was similar to pure bluegrass. It was concluded that …
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