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Filtering by: Creator Hardy, Pierre-Yves Remove constraint Creator: Hardy, Pierre-Yves Degree Field Horticulture Remove constraint Degree Field: Horticulture

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  • Breeding and genetics of lilacs and hardy hibiscus

    Creator:
    Lattier, Jason D.
    Abstract:
    Lilacs are a group of ornamental trees and shrubs in the Oleaceae family consisting of 22 to 30 species. There are six series within genus Syringa: Pubescentes, Villosae, Ligustrae, Ligustrina, Pinnatifoliae, and Syringa. Fertility and cross-compatibility among cultivars, species, and series have yet to be formally investigated. Over three years,...
    Resource Type:
    Dissertation
    Full Text:
    : Breeding and Genetics of Lilacs and Hardy Hibiscus Abstract approved

  • Growth in herbaceous perennials

    Creator:
    Nakajima, Rie
    Abstract:
    Several studies of herbaceous perennials have addressed the effects of environmental factors during and after production, inherent cold hardiness, and post-harvest handling procedures to enhance flowering and growth during establishment. The regrowth of both woody and herbaceous forage plants following establishment is reported to be directly related to reserve-nitrogen content....
    Resource Type:
    Masters Thesis
    Full Text:
    " overwinter because these plants, such as begonias, impatiens, and geraniums (Pelargoniums) are not hardy

  • Water relations and the root regeneration response of Douglas-fir

    Creator:
    Cobb, Cheryl Anne
    Abstract:
    The effect of lifting date and root-pruning treatments on water potential, root regeneration, and shoot growth of six-month-old and three-year-old Douglas-fir seedlings bare-root transplanted into a growth chamber, and sawdust bed, respectively, was studied. Root growth in six-month-old and three-year-old seedlings was highest in February and August respectively. Survival was...
    Resource Type:
    Masters Thesis
    Full Text:
    be regenerated. Nurserymen term those plants resistant to stress "hardy" and those susceptible

  • Influence of abiotic and biotic factors on developmental parameters of Drosophila suzukii (Diptera: Drosophilidae)

    Creator:
    Tochen, Samantha
    Abstract:
    Drosophila suzukii (Diptera: Drosophilidae), a pest of thin-skinned fruits, has been detected worldwide recently, with new locations of establishment determined annually since it first became a concern on continental North America in 2008. Drosophila suzukii females are different from most other drosophilids as being one of two known species capable...
    Resource Type:
    Masters Thesis
    Full Text:
    1970s, D. suzukii could be found throughout mainland Asia (Delfinado and Hardy 1977). The first known

  • Indicators of deciduous shade tree development useful for timing chemical defoliation and harvest

    Creator:
    Hotze, Mary Louise
    Abstract:
    In the mild climate of the Pacific Northwest, the harvesting of deciduous shade trees in wholesale nurseries is prolonged from October to January because of autumn growth and prolonged leaf retention. Economically, it is advantageous to defoliate nursery trees at the earliest possible date. Premature defoliation, however, can cause die...
    Resource Type:
    Dissertation
    Full Text:
    as plants became hardy to -45 C. Initiation of vegetative and reproductive primordia in apical