Thesis (Ph. D.)--University of Adelaide, 1982. / Includes bibliographical references (leaves A19-A23).

Thesis (M.S.)--Oregon State University, 2001. / Typescript (photocopy). Includes bibliographical references (leaves 45-48). Also available on the World Wide Web.

Thesis (PhD)--Montana State University--Bozeman, 2009. / Typescript. Chairperson, Graduate Committee: Patrick G. Hatfield. Includes bibliographical references (leaves 57-68).

Thesis--Virginia Polytechnic Institute and State University. / Vita. Abstract. Includes bibliographical references (leaves 51-70). Also available via the Internet.

This study was designed to investigate the repellent effects of pineoil on the Sitka spruce weevil (=white pine weevil), Pissodes strobi Peck, and to evaluate the utility of large scale color aerial photography for detecting weevil attacked Sitka spruce, Picea sitchensis (Bong.) Carr.. Two formulations of pineoil, BBR1 and BBR2, were field tested for their effect in protecting immature Sitka spruce from weevil attack in 36 twenty meter square plots at two locations on Vancouver Island. The pineoil formulations were applied both topically to the terminal leaders and in slow release devices hung at the apical whorl of Sitka spruce trees. The topical application of BBR1 to the leaders of all trees in the plots reduced the number of new weevil attacks to two trees compared with 24 new attacks in the control plots. None of the other pineoil treatments were found to differ significantly from the controls. An examination of the weevil attack history in the study plots showed that the average number of new weevil attacks in the pineoil treated plots were proportionately lower than the number of new attacks in the control plots. These findings suggest that applications of BBR1 to the terminal leaders of Sitka spruce trees will protect them from attack by P. strobi. Large scale color infra-red (CIR) and normal color (NC) aerial photograph stereo transparencies were evaluated for their utility in detecting weevil attacks in immature Sitka spruce stands. Four independent interpreters correctly identified an average of 38% more weeviled trees on CIR film than on NC film during a 1 minute test period. More errors were made by the interpreters with CIR film than with NC film. Interpreter errors made with CIR film were mainly due to a lack of ability to discriminate between new weevil attacks and attacks made the previous year. Errors made with NC film were due mainly to misidentifying healthy trees as new weevil attacks. These findings suggest that for the purpose of detecting weevil attacked Sitka spruce trees, CIR aerial photographs would be both faster and more accurate than NC photographs. / Forestry, Faculty of / Graduate

Experiments were conducted to determine the impact of water management strategies on populations of rice water weevil, Lissorhoptrus oryzophilus Kuschel. One experiment was conducted at the Delta Research and Extension Center during 2017 and 2018. The performance of chlorantraniliprole and thiamethoxam was evaluated in combination with flood removal of a field as a cultural control tactic for rice water weevil. Seed treatments significantly reduced rice water weevil populations at the prelood sample timing, only chlorantraniliprole reduced populations at the post-drainage sample timing. Overall, flood removal had little impact on rice water weevil management. An experiment was also conducted to determine the spatial and temporal distribution of rice water weevil larvae within a furrow irrigated rice production system. This experiment was established across eleven grower fields in major rice producing counties across the Mississippi Delta from 2017 to 2018. Fields were divided into three zones based on free standing water within that portion of the field between irrigation events. Rice water weevil larval populations were reduced in portions of the field that did not remain at two of the three sample timings. An experiment was conducted at the Delta Research and Extension Center during 2017 to determine the impact of various water management strategies and insecticide seed treatments on rice water weevil populations. The –10 cm free standing water management strategy significantly reduced rice water weevil populations from the untreated control. Chlorantraniliprole had significantly higher yields across all water management strategies compared to other seed treatments and the untreated control.

A survey of Bariditae in Mississippi resulted in records of 75 species in 32 genera and included two undescribed species and 36 new state records. An additional two species were recognized as possibly occurring in Mississippi as well. Diagnoses for all of the genera and species in the state are provided and keys to the genera as well as all of the species were made. Species were found in every county within Mississippi and are representative of the Bariditae fauna of the southeastern United States. Open, prairie-like habitats and aquatic wetland habitats were the habitats with the highest biodiversity of Bariditae in the state. Species of Baris, Geraeus, Linogeraeus, and Odontocorynus, were found in the highest numbers and Linogeraeus and Sibariops were found to be the most speciose genera in the state. Sibariops amica, S. benigna, and S. houstoni, are proposed as new synonyms of S. concinna.

Call number: LD2668 .T4 1956 O32 / Master of Science

No description available.

No description available.