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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

Enhancement of the weed competitive ability of lowland rice (Oryza sativa L.) cultivars

Creator:: Ranasinghe, Lakshman L.
Abstract:: Most of the presently grown cultivars of rice (Oryza sativa L.) have poor competitive ability against weeds if compared with traditional cultivars. Therefore, effective weed control is an important but often costly and difficult management practice in rice crop production. If weed competitive ability of rice cultivars could be improved...
Resource Type:: Dissertation
Full Text:: different rice varieties in different ways. For C 4-63, an intermediate-stature variety, the weed free

The control of colonial bentgrass in Kentucky bluegrass turf

Creator:: McLoughlin, John Walter
Abstract:: Herbicides were tested for the selective control of bentgrass in Kentucky bluegrass turf under three levels of competition. Best control in zero competition was obtained with a winter treatment of bromacil at two pounds per acre. Under circumferential and direct competition, best control was obtained with a summer and fall...
Resource Type:: Masters Thesis
Full Text:: invasion was accentuated in bluegrass varieties which were weakened by disease. The competitive ability

Resistance to atrazine and diuron in California brome

Creator:: Workineh, Mengistu Lemma
Resource Type:: Masters Thesis
Full Text:: (Hughes et a1.,1962). This native species is widely distributed in the Pacific northwest, is highly

The influence of selected environmental factors on diuron toxicity to winter wheat

Creator:: Homesley, Wylie Buress
Abstract:: Previous work has shown that diuron (3-(3, 4- dichlorophenyl)-1, 1-dimethylurea) is less toxic to fall-planted wheat than to wheat planted in the spring. Diuron has been a significant factor in increasing yields of winter wheat grown in Oregon's Willamette Valley. The influence of several selected environmental factors on diuron toxicity...
Resource Type:: Dissertation
Full Text:: fall than in an early fall development. The resistance of Nugaines, a new variety, to diuron was com

Girdling and shading effects on inflorescence necrosis and rachis composition of pinot noir grapevine

Creator:: Ibacache, Antonio E.
Abstract:: There are several grape disorders that reduce fruit set. One, millerandage, is from poor fertilization to produce "hen and chicken" or small seedless berries; while another, Coulure, is the failure of grape flowers to develop into berries. A third one, inflorescence necrosis (INec), is a disorder that should be in...
Resource Type:: Masters Thesis
Full Text:: INec was evaluated in 1990. Shoot density, which was adjusted before bloom, did not affect INec

Annual bluegrass (Poa annua L.) control with ethofumesate during turfgrass establishment

Creator:: Wieneche, David L.
Abstract:: Temperate climates are particularly conducive to growth of annual bluegrass which readily invades and dominates most cool-season turfgrasses. Ethofumesate (2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranyl methanesulfonate) is one herbicide available which will selectively control annual bluegrass. The primary objectives of this research were to determine optimum application rates and timing of ethofumesate for control of...
Resource Type:: Masters Thesis
Full Text:: environment such as a pasture or lawn. Varieties found in different habitats worldwide exist as annuals

Effect of broadleaf weeds on winter wheat yields

Creator:: Gingrich, Gale Allen
Resource Type:: Masters Thesis
Full Text:: % and in taller varieties where populations were 69 to 85 plants/m2, yields were reduced by over 20

Yellow nutsedge (Cyperus esculentus L.) control with herbicides : the role of tuberization

Creator:: Pereira, Welington
Resource Type:: Dissertation
Full Text:: evaluated, and single and repeated yearly applications are compared in chapter 6. Chapter 2 REVIEW

Effect of density, proportion, and spatial arrangement on the competition of winter wheat and Italian ryegrass (Lolium multiflorum Lam)

Creator:: Hashem, Abul, 1956-
Resource Type:: Dissertation
Full Text:: State University in 1987. In the Willamette Valley, its yields have surpassed most other varieties. It

ScholarsArchive@OSU

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

Enhancement of the weed competitive ability of lowland rice (Oryza sativa L.) cultivars

The control of colonial bentgrass in Kentucky bluegrass turf

Resistance to atrazine and diuron in California brome

The influence of selected environmental factors on diuron toxicity to winter wheat

Girdling and shading effects on inflorescence necrosis and rachis composition of pinot noir grapevine

Annual bluegrass (Poa annua L.) control with ethofumesate during turfgrass establishment

Effect of broadleaf weeds on winter wheat yields

Yellow nutsedge (Cyperus esculentus L.) control with herbicides : the role of tuberization

Effect of density, proportion, and spatial arrangement on the competition of winter wheat and Italian ryegrass (Lolium multiflorum Lam)

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