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Creator:: Tanphiphat, Karin
Abstract:: Tuber oatgrass (Arrhenatherum elatius (L.) Presl. var. bulbosum (Willd.) Spenn.) is a perennial grass that often becomes a weed problem in Western Oregon. Control efforts using glyphosate often give unsatisfactory results. The effects of several factors on development of tuber oatgrass were investigated. Long days and cool temperatures (16/8h, 20/10C...
Resource Type:: Dissertation
Full Text:: committee, Dr. Donald Armstrong, Dr. Garvin Crabtree, Dr. George Mueller-Warrant, and Dr. Harry Mack for

Creator:: Alvarado, Renan A.
Resource Type:: Dissertation
Full Text:: . Donald Armstrong took the time and patience to train me in various aspects of enzyme work and provided

Creator:: Colbert, Floyd Oral
Resource Type:: Dissertation
Full Text:: desorbed with 0.1 M BaC1 2° He postu- lated that BaCl2 displaced prometone primarily through cation ex

Creator:: McAuliffe, David
Abstract:: Previous studies have shown loss of ethofumesate activity when the herbicide was applied to dry soil (2% w/w moisture content) in both field and greenhouse studies, even when rainfall or irrigation was received within a few days. Laboratory studies were conducted to determine the mechanism for this activity loss. Dry...
Resource Type:: Dissertation
Full Text:: Typed by Lynn J. O'Hare and Gloria M. Foster for David McAuliffe ACKNOWLEDGMENTS The time spent and

Creator:: Martin, David C. (David Christopher), 1949-
Resource Type:: Masters Thesis
Full Text:: carboxyl resin to catalyze hydrolysis of atrazine has been demonstrated by Armstrong and Chesters (4

Creator:: Wells, Barbara Heard
Abstract:: Time-course growth chamber studies were conducted on little mallow (Malva parviflora L.) to determine whether sublethal doses of lactofen (1'-(carboethoxy)ethyl-5-[2-chloro-4-(trifluoromethyl) phenoxy]-2- nitrobenzoate) would enhance uptake of glyphosate (N'-(phosphonomethyl) glycine) by altering membrane permeability. Lactofen-induced membrane peroxidation was determined by harvesting leaf discs, measuring stress ethylene evolution, and recording increases in...
Resource Type:: Dissertation
Full Text:: of different cuticle abrasion levels (N = none, L = low, M = medium, H = high) on glyphosate uptake

Creator:: McAuliffe, David
Abstract:: Applications of ethofumesate in Oregon have been observed from previous research and from commercial use to be less effective when applied to dry soils, even if subsequent precipitation occurred within a few days. Two field studies were established in the summer of 1979 using sweet corn (Zea mays L. 'Jubilee')...
Resource Type:: Masters Thesis
Full Text:: M. Foster for David McAuliffe DEDICATION This thesis is dedicated to my wife, Donna, for her

Creator:: Harris, James O.
Abstract:: The use of terbacil for weed control was adapted by a high percentage of Oregon peppermint growers soon after its introduction in 1967. To help clarify some of the implications of terbacil usage, three studies were undertaken to collect information concerning (a) the movement and build-up of terbacil in various...
Resource Type:: Masters Thesis
Full Text:: the labor in other operations of the nursery. Armstrong et al. (1968) compared mechanical and

Creator:: Paller, Enrique C.
Abstract:: Greenhouse and growth chamber experiments were conducted with the following objectives: (a) to study the effects of N-1-naphthylphthalamic acid (naptalam) on shoot and tuber production, rhizome transformation, and growth of yellow nutsedge (Cyperus esculentus L.) plants; (b) to study the effects of N-phosphonomethyl glycine (glyphosate) on nutsedge plants at different...
Resource Type:: Dissertation
Full Text:: plants were transferred to 900-m1 jars containing 800 ml each of 2.05 x 10-5 M, 4.11 x 10-5 M, and 8.23

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