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Mechanisms of resistance in broccoli, Brassica oleracea italica to the garden symphylan, Scutigerella immaculata (Newport)

Creator:: Simagrai, Montri
Abstract:: Studies were conducted on the mechanisms contributing to resistance in broccoli, Brassica oleracea italica, to the garden symphylan, Scutigerella immaculata (Newport). Differences in resistance to symphylan injury were shown between five selected broccoli cultivars. The hybrid cultivars, Crusader, Green Duke and Bravo, showed a higher level of resistance to symphylans...
Resource Type:: Masters Thesis
Full Text:: Mechanisms of resistance in broccoli, Brassica oleracea

Conservation of arthropod natural enemies in broccoli with relay strip-cropping

Creator:: McGrath, Daniel M. (Daniel Morton)
Abstract:: Relay strip-cropping combines two vegetation management tactics, under-sowing and strip-management. In this study conducted from 1994 though 1997, a cover crop seed-mixture containing oats (Avena sativa L. var. "Monida"), common vetch (Vicia sativa L.), red clover (Trifolium pratense L.), annual ryegrass (Lolium multflorum Lam.), and buckwheat (Fagopyrum esculentum Moench) was...
Resource Type:: Dissertation
Full Text:: ofArthropod Natural Enemies in Broccoli with Relay Strip-Cropping Abstract approved: Relay strip-cropping

Seasonal activities of two species of eriophyid mites on holly and their relation to foliage damage

Creator:: Welton, Richard Elroy
Resource Type:: Masters Thesis
Full Text:: ARTS June 1962 APPROVED: In Charge of Major Date thesia is presented aary í1ypOd 3y ;1oise

Oviposition of the codling moth, Laspeyresia pomonella (L.), on several varieties of apples and pears

Creator:: Gut, Larry J.
Abstract:: Ovipositional behavior of the codling moth, Laspeyresia pomonella (L.), on several varieties of apples and pears grown in the Pacific Northwest was investigated during the spring/summer of 1979. Field studies showed that early in the season more eggs were laid on the Bosc variety than on several other apple and...
Resource Type:: Masters Thesis
Full Text:: .), on several varieties of apples and pears grown in the Pacific Northwest was investigated during the

Sampling and management of garden symphylans (Scutigerella immaculata Newport) in western Oregon

Creator:: Umble, Jon R.
Abstract:: Garden symphylans (Scutigerella immaculata Newport) are increasingly important pests of below-ground parts of over 100 crops in Oregon. The focus of our work was to improve S. immaculata management through 1) development of a bait sampling method, 2) examination of the susceptibility of selected crops to S. immaculata feeding in...
Resource Type:: Dissertation
Full Text:: . Squash and broccoli showed sharp decreases in NDVI at densities from 1 to 10 S. immaculata per sample

Biology, ecology and management of Scaptomyza apicalis Hardy (Diptera : Drosophilidae) on meadowfoam, Limnanthes alba benth in western Oregon

Creator:: Panasahatham, Sarote
Abstract:: Biology of Scaptomyza apicalis Hardy (Diptera: Drosophilidae) was studied in relation to its host, meadowfoam, Limnanthes alba, a recent oil seed crop grown in the Willamette Valley, Oregon. Populations of flies and larvae were monitored weekly over three consecutive crop-years beginning in 1996. Yellow sticky traps gave relative population estimates...
Resource Type:: Dissertation
Full Text:: first commercial variety of cultivated meadowfoam (L. a/ba a/ba), Foamore, was released in 1975. This

Biological control of purple loosestrife Lythrum salicaria (Lythraceae) : stability of control and integration with wetland management practices

Creator:: Schat, Marjolein
Abstract:: Purple loosestrife is a wetland perennial that came to the eastern seaboard of North America in ship ballast and raw wool in the 1800's. Since coming to the United States, it has spread across the country, forming dense monospecific stands in wetlands. Mechanical and chemical control was expensive and ineffective,...
Resource Type:: Masters Thesis
Full Text:: study. In the second part of my study I evaluated how biological control of purple loosestrife and the

Biological control of spider mites (Acari: Tetranychidae) on grape emphasizing regional aspects

Creator:: Prischmann, Deirdre A.
Abstract:: During summer of 1998 and 1999, 34 and 10 vineyard sites, respectively, were sampled to assess spider mite pests and associated biological control by phytoseiid mites. Vineyards studied spanned five major valleys in western Oregon where grape production occurs. Leaf samples were taken from site perimeters and centers. One leaf...
Resource Type:: Masters Thesis
Full Text:: . in central Asia (De Blij 1981, Jackson and Schuster 1987, Winkler 1962). By the late 400s (A. D

The parasite complex of the pea aphid, Acyrthosiphon pisum (Harris) on alfalfa in western Oregon

Creator:: Dickie, Alfred Gordon
Abstract:: This study was initiated in the Spring of 1966 for the purpose of determining the present status and effectiveness of imported parasitic wasps of the pea aphid in the Willamette Valley of western Oregon. The pea aphid is a serious pest throughout the pea and alfalfa growing regions of the...
Resource Type:: Masters Thesis
Full Text:: established but in much smaller numbers. The native variety, Aphidius ervi pulcher was rarely encountered

Varietal resisitance of hops, Humulus lupulus (Linn.), to the two-spotted spider mite, Tetranychus urticae (Koch)

Creator:: Mayberry, Terrel Wilson
Abstract:: The purpose of this study was to determine the relative resistance of genetic lines of hops, Humulus lupulus (Linn.) to the two-spotted spider mite, Tetranychus urticae (Koch) in western Oregon. Approximately three-hundred genetic lines of hops were screened under insectory conditions during the 1965 growing season at Corvallis, Oregon. Reduction...
Resource Type:: Masters Thesis
Full Text:: varieties. This more rapid decline in oviposition on the standard variety had the effect of skewing the

ScholarsArchive@OSU

Mechanisms of resistance in broccoli, Brassica oleracea italica to the garden symphylan, Scutigerella immaculata (Newport)

Conservation of arthropod natural enemies in broccoli with relay strip-cropping

Seasonal activities of two species of eriophyid mites on holly and their relation to foliage damage

Oviposition of the codling moth, Laspeyresia pomonella (L.), on several varieties of apples and pears

Sampling and management of garden symphylans (Scutigerella immaculata Newport) in western Oregon

Biology, ecology and management of Scaptomyza apicalis Hardy (Diptera : Drosophilidae) on meadowfoam, Limnanthes alba benth in western Oregon

Biological control of purple loosestrife Lythrum salicaria (Lythraceae) : stability of control and integration with wetland management practices

Biological control of spider mites (Acari: Tetranychidae) on grape emphasizing regional aspects

The parasite complex of the pea aphid, Acyrthosiphon pisum (Harris) on alfalfa in western Oregon

Varietal resisitance of hops, Humulus lupulus (Linn.), to the two-spotted spider mite, Tetranychus urticae (Koch)

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