Index Catalog // ScholarsArchive@OSU

Biology, distribution and economic threshold of the strawberry root weevil, Otiorhynchus ovatus (L.), in peppermint

Creator:: Cacka, Joseph Francis
Resource Type:: Masters Thesis
Full Text:: , Dr. Ralph E. Berry, whose support and constant encouragement will always be remembered. TABLE OF

Development and evaluation of sequential sampling plans for redbacked cutworm larvae, Euxoa ochrogaster (Guenée), in Oregon peppermint

Creator:: Danielson, Stephen Dale
Abstract:: Field studies were conducted in 1975 and 1976 to evaluate sequential sampling plans for the redbacked cutworm, Euxoa ochrogaster (Guenee), in Oregon peppermint. Sequential sampling resulted in reliable decisions concerning whether or not cutworm densities were high enough to justify treatment with insecticides. The use of sequential sampling reduced the...
Resource Type:: Masters Thesis
Full Text:: (GUENEE), IN OREGON PEPPERMINT Abstract approved: ,Redacted for Privacy RAlph E. Berry Field studies

Resistance in snap beans, Phaseolus vulgaris L., to adult western spotted cucumber beetle, Diabrotica u. indecimpunctata Mann

Creator:: Eltoum, Elameen M. A.
Abstract:: Studies to evaluate resistance in snap beans, Phaseolus vulgaris L. to adult western spotted cucumber beetles, Diabrotica u. undecimpunctata Mann. were conducted in greenhouse cages, field cages, field plots, and in temperature controlled cabinet in the laboratory. Results showed that there were differences in susceptibility to adult feeding injury between...
Resource Type:: Masters Thesis
Full Text:: . Ralph E. Berry, my major professor, for his kindness, understanding, and support. Dr. Berry helped and

The response of scutigerella immaculata to naturally occurring chemical stimuli

Creator:: Reeve, Daniel Hart
Abstract:: A study was conducted of the response of the garden symphylan, Scutigerella immaculata (Newport), to naturally occurring chemicals. Results of olfactometer studies with plant odors were inconclusive because air currents in one olfactometer and the shape of another had undesirable effects on symphylan behavior. Non-random distributions of symphylans in chambers...
Resource Type:: Masters Thesis
Full Text:: IMMACULA TA TO NATURALLY OCCURRING CHEMICAL STIMULI Redacted for Privacy Abstract approved: Ralph E

Studies on resistance of rice to Sogatodes oryzicola (Muir) and a parasitoid, Haplogonatopus sp., in Costa Rica

Creator:: Alvarez B., Francisco
Abstract:: Twenty-one rice cultivars were evaluated to determine the difference between populations of Sogatodes oryzicola (Muir) (Homoptera: Delphacidae) in Costa Rica and Colombia, Survival, mortality and population development of S. oryzicola on five selected cultivars was used to determine levels of plant resistance. The importance and potential of the parasitoid-predator Haplogonatopus...
Resource Type:: Masters Thesis
Full Text:: Costa Rica. Abstract approved: Redacted for Privacy s Ralph E. Beiky Twenty-one rice cultivars were

Biology and population regulation of the strawberry root weevil, Otiorhynchus ovatus (L.) (Coleoptera:Curculionidae)

Creator:: Emenegger, Donald Brian
Abstract:: The life history of the strawberry root weevil, Otiorhynchus ovatus (L.), on peppermint was studied in the Willamette Valley of Oregon to provide the information necessary to develop effective control measures. Adult weevils emerged from the soil from late May until mid- June and were active in the field until...
Resource Type:: Masters Thesis
Full Text:: : CURCULIONIDAE) Abstract approved: Redacted for Privacy Ralph E. Berry The life history of the strawberry root

Management of variegated cutworm in peppermint

Creator:: Coop, Leonard Bryan
Abstract:: A pest management program for variegated cutworm (VC), Peridroma saucia (Hubner), in Oregon peppermint was developed based on studies of pheromone trapping, sampling methods, and economic thresholds. Pheromone traps effectively trapped VC males and were used to reflect development and oviposition trends. Trap height was linearly correlated to moth catch...
Resource Type:: Dissertation
Full Text:: : Redacted for Privacy 7 Ralph E. t.96 A pest management program for variegated cutworm (VC), Peridroma

Mechanisms of hop resistance to the twospotted spider mite (Tetranychus urticae Koch)

Creator:: Peters, Kay Myra
Abstract:: Hop varieties were compared under field and greenhouse conditions to determine their relative susceptibility to the twospotted spider mite, Tetranychus urticac Koch. A fertility schedule was prepared for mites on resistant and susceptible varieties, and tests were conducted to compare sex ratio, oviposition rate, survival rate, and developmental rate of...
Resource Type:: Masters Thesis
Full Text:: TWOSPOTTED SPIDER MITE (TETRANYCHUS URTICAE KOCH) Abstract approved: Redacted for Privacy Ralph E. Berry

Influence of the secondary metabolites of Mentha piperita L. on Tetranychus urticae Koch

Creator:: Larson, Katherine Cole
Resource Type:: Masters Thesis
Full Text:: the author, Katherine C. Larson ACKNOWLEDGEMENTS I would like to thank Ralph E. Berry, my major

Ecology of the predatory mite, Pergamasus quisquiliarum Canestrini (Acari: Mesostigmata)

Creator:: Groth, Eric M.
Abstract:: Pergamasus quisquiliarum Canestini is a polyphagous predatory mite that has been shown to feed on the economically important arthropod, Scutigerella immaculata Newport (Symphyla: Scutigerellidae), Collembola, Diptera larvae, Enchytraeid worms, and miscellaneous other soil organisms. This study examined the feeding behavior of P. quisquiliarum, the effects of cover cropping and tillage...
Resource Type:: Masters Thesis
Full Text:: quisquiliarum Canestrini (Acari: Mesostigmata). Abstract approved: / Ralph E. Be Pergamasus quisquiliarum

ScholarsArchive@OSU

Biology, distribution and economic threshold of the strawberry root weevil, Otiorhynchus ovatus (L.), in peppermint

Development and evaluation of sequential sampling plans for redbacked cutworm larvae, Euxoa ochrogaster (Guenée), in Oregon peppermint

Resistance in snap beans, Phaseolus vulgaris L., to adult western spotted cucumber beetle, Diabrotica u. indecimpunctata Mann

The response of scutigerella immaculata to naturally occurring chemical stimuli

Studies on resistance of rice to Sogatodes oryzicola (Muir) and a parasitoid, Haplogonatopus sp., in Costa Rica

Biology and population regulation of the strawberry root weevil, Otiorhynchus ovatus (L.) (Coleoptera:Curculionidae)

Management of variegated cutworm in peppermint

Mechanisms of hop resistance to the twospotted spider mite (Tetranychus urticae Koch)

Influence of the secondary metabolites of Mentha piperita L. on Tetranychus urticae Koch

Ecology of the predatory mite, Pergamasus quisquiliarum Canestrini (Acari: Mesostigmata)

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