Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1983. / Vita. Abstract. Includes bibliographical references (leaves 72-80). Also available via the Internet.

Thesis--University of Wisconsin--Madison. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 42-43).

Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 74-77).

Thesis--University of Florida. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 143-153).

No description available.

Typescript, etc. / Digitized by Kansas State University Libraries

No description available.

Animal population ecology has become a rapidly expanding natural science over the past decade. This trend is the result of many interacting factors, not least among them being; the maturation of ecology from a more or less descriptive and a priori science to the beginnings of a quantitative, deductive-inductive approach; and, the need for a better understanding of the effect of pesticides and biological agents on the trend of pest populations. Such knowledge is almost completely lacking, although the work in Canada of R.F. Morris, E.J. LeRoux and their associates forms the basis of such a need. Obviously any quantitative study aimed at understanding the dynamics of any animal population, and hence the causes that account for changes in the rise and fall of such a population, must be a valuable addition to knowledge on this subject. [...]

No description available.

Ovipositors of female leafminers were examined microscopically to locate and describe types of sensory receptors present. Two basic types were found: trichoid sensilla and basiconic sensilla. These receptors are believed to function as mechano- and chemoreceptors to evaluate the suitability of a host plant for feeding, oviposition, and subsequent larval development. Two greenhouse experiments were conducted to evaluate the effects of photoperiod and application of plant growth regulators on two factors: 1) feeding and oviposition site selection and 2) spatial distribution of feeding and oviposition sites on individual chrysanthemum plants. In the photoperiod experiment, leafminers fed and oviposited more intensely on chrysanthemums grown under short days (SD) than on plants grown under long days (LD). Densities of feeding punctures and larval mines on chrysanthemums grown under SD was positively related to leaf height on the plant, and negatively related to leaf trichome density. Spatial distribution of feeding and oviposition sites within plants under LD was variable, and no specific pattern of preference was discerned. An experiment to determine the effect of plant growth regulators on site selection by female leafminers revealed no significant differences (P > 0.05) in feeding and oviposition densities on chrysanthemums treated with plant growth regulators napthalene napthaleneacetic acid, gibberellic acid, and daminozide. / Master of Science