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Andrzej K. Noyszewski, Neil O. Anderson, Alan G. Smith, Andrzej Kilian, Diana Dalbotten, Emi Ito, Anne Timm and Holly Pellerin

harvested along trails or rivers, and leaves were steamed, dried, and bundled until woven ( Steltzer, 1976 ). Morphological differences that distinguish native and exotic forms of reed canarygrass have not been identified. Various strategies to control

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Melissa Bravo, Antonio DiTommaso and David Hayes

, miscellaneous hardwood/hemlock ( Tsuga sp.) communities, and freshwater intertidal mudflats. Each site has a rich history of introduced exotic plant species in the manicured landscape and exotic crops for agricultural and silvicultural purposes. History of

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Samson Zeray Tesfay, Sakhile Mathe, Albert T. Modi and Tafadzwanashe Mabhaudhi

, antibacterial, or antiviral agent ( Dai and Mumper, 2010 ). Although the potential of exotic vegetables is widely known and reported on, the opposite is true for ALVs where evidence of their nutritional potential currently remains anecdotal. ALVs, although

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S.M. Scheiber, E.F. Gilman, D.R. Sandrock, M. Paz, C. Wiese and Meghan M. Brennan

residential landscapes ( Anella, 2000 ; Knox, 1990 ). The objective of this study was to evaluate postestablishment growth and aesthetic quality of commonly used native and exotic shrubs under irrigated and nonirrigated landscape conditions. Materials and

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Iftikhar Ahmad, Muhammad B. Rafiq, John M. Dole, Bilal Abdullah and Kinza Habib

outdated techniques and limited resources. Introduction of exotic specialty cut species is one of the best options for small-scale farming businesses, but producers are reluctant to grow new species because of the lack of sufficient information about their

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Reid R. Rice and William F. Tracy

., 2006 ) that genetic gains may be achieved in competitive U.S. dent corn breeding programs through incorporation of exotic germplasm in an effort to address the narrowing diversity of the germplasm base that has resulted from inbred recycling among elite

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Jing Luo, David Tay and John Cardina

Exotic noxious plants, including invasive plants and exotic weeds, have caused huge economic loss and ecological damage around the world. To prevent further introductions of such species as crops or ornamental plants, biological and ecological traits associated with invasiveness and weediness need to be identified so that prediction can be made on the potential of being noxious for proposed species. It was suggested that weeds were usually generalists that can survive and reproduce in a wide range of environments; i.e., they were quite “plastic” in response to different environments. In accordance to this idea, phenotypic plasticity has been recently proposed as an indicator and predictor for weeds and invasive plants. This hypothesis is tested using two exotic dandelion species: Taraxacum officinale (common dandelion), widespread weed, and T. laevigatum (red-seeded dandelion), which occurs in a much lower frequency in Ohio. A greenhouse experiment was conducted in which the two species were grown in two soil moisture levels (dry vs. wet) combined with two light exposure levels (full sun vs. shade). Various traits were measured to see whether T. officinale is more plastic than T. laevigatum in these four environments. The results show that, when using coefficient of variance (CV) as a measurement of plasticity, T. officinale has significantly larger CV than T. laevigatum in plant diameter (P = 0.02), shoot: root ratio (P = 0.04) and soil pH (P = 0.02). This indicates that T. officinale is more plastic in some of the resource-capture-related traits such as leaf morphology and biomass allocation, and presumably also in root exudates, which alter the soil pH.

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Paul W. Bosland

109 WORKSHOP 17 Use of Introgression and Exotic Germplasm in the Improvement of Vegetable Species

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James D. McCreight, Jack E. Staub, Todd C. Wehner and Narinder P.S. Dhillon

scientific program of screening exotic germplasm (of Indian origin), crossing of resistant germplasm with susceptible germplasm, and subsequent controlled pollination with one backcross generation and selection for resistance and horticultural type. In this

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Edward L. McWilliams

Hurricanes strike the Gulf Coast of the United States every few years. We briefly describe generalized hurricane tracks for the Gulf Coast and vegetation damage using NDVI satellite imagery as well as slides of damaged urban trees in Florida. The impact of recent hurricanes on both pecan defoliation and production and on initial damage and subsequent recovery of various ornamental trees is described. Pecan harvests were greatly reduced by hurricanes that struck late in the season in both Alabama and Texas. Varieties of pecans varied in their susceptibility to various stresses. Pine forests were sometimes devastated by certain hurricanes while live oaks, various shrubs, and important insects often survived the same storms with little damage. Many exotic ornamental plants including Chinese tallow are either adventive or invasive along the Gulf Coast. Species escape from cultivation over a long period of time and exhibit different invasion lag phases. In Texas and Louisiana, hurricane damage to native trees allowed Chinese tallow seedlings and saplings to subsequently dominate some areas as a result of the disturbance. One delayed ecological response to hurricanes and typhoons is an acceleration of ongoing exotic plant invasions.