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Filtering by: Creator Runge, Jeffrey A. Remove constraint Creator: Runge, Jeffrey A. Advisor Miller, Jeffrey C. Remove constraint Advisor: Miller, Jeffrey C. Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • A three-trophic-level perspective on factors influencing herbivore abundance on collard

    Creator:
    McIver, James D.
    Abstract:
    The influence of natural enemies and plant apparency in determining the abundance of the cabbage aphid Brevicoryne brassicae L. and the imported cabbageworm Pieris rapae L. was examined on collards grown in a collard monoculture and in a collard-alfalfa biculture. This design was used to examine the factors affecting collardherbivore...
    Resource Type:
    Dissertation
    Full Text:
    A Three-Trophic-Level Perspective on Factors Influencing

  • Systematics and host associations of Ormyrus species (Hymenoptera: Chalcidoidea)

    Creator:
    Hanson, Paul E.
    Abstract:
    The genus Ormyrus has a worldwide distribution and comprises about sixty recognized species. The higher taxonomic relationships of the genus are uncertain, as evidenced by its placement in the families Ormyridae, Pteromalidae, or Torymidae. Here, the genus is described in detail and a preliminary catalog of the world species is...
    Resource Type:
    Dissertation
    Full Text:
    genus Ormyrus has a worldwide distribution and comprises about sixty recognized species. The higher