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Creator:: Harper, James Douglas
Abstract:: A study of mortality, food consumption, food utilization, and polyhedral production following single and simultaneous challenges of the variegated cutworm, Peridroma saucia (Hubner), with DDT and a nuclear polyhedrosis virus was made. Fourth instar larvae were challenged topically with three levels of DDT and per os with three levels of...
Resource Type:: Dissertation
Full Text:: value: Dr. Clarence G. Thompson, Entomologist, United States Forest Service, for his advice and

Creator:: Koontz, Robert Frank
Abstract:: A study was made to determine biological relationships between the garden symphylan, Scutigerella immaculata (Newport), and an entomogenous fungus, Entomophthora coronata (Costantin), which attacks it under certain conditions. Until this fungus was found to infect this pest, no organism which seemed to offer promise of control had been discovered. Symphylan...
Resource Type:: Dissertation

Creator:: Wong, Kwan Lun
Resource Type:: Masters Thesis
Full Text:: his indebtedness to the Oregon State Agricultural Experiment Station, and to Mr. B. G. Thompson

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