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Dissertations / Theses on the topic 'Weed control'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Mühleisen, Martin Bernd. "Chemical weed control : options in fibre flax." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0031/MQ64411.pdf.

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2

Umeda, Kai. "Weed Control in Melons." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/146709.

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3

Umeda, K., and G. Gal. "Noncrop Herbicide Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/221655.

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Paraquat and diquat were effective against weeds immediately at 3 DAT. Glyphosate, sulfosate, and glufosinate exhibited activity against the weeds at 7 to 10 DAT. Paraquat provided the most complete weed control of most weeds at 10 to 16 DAT. Most of the diquat treated weed recovered and exhibited regrowth after 22 DAT. Glufosinate did not provide adequate control of most weeds at 22 DAT similar to diquat. Glyphosate and sulfosate were nearly equivalent at 0.50 and 2.0 lb AI/A against most weeds at most of the rating dates.

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4

Bitterlich, Iris. "Weed interference and weed control in cole crops and onion." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28920.

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Additive weed competition experiments were undertaken to study the effect of lamb's-quarters (Chenopodium album) interference on direct seeded broccoli. Lamb's-quarters (3, 8, 10, 12, and 15 plants m⁻²) began to affect broccoli growth 28 to 36 days after seeding. Decreases in crop growth increased with weed density as time after seeding increased. Yield data were fitted to a rectangular hyperbolic model which indicated that even one lamb's-quarters plant m⁻² could reduce total yield by 18 to 20 percent and marketable yield (head >10 cm across) by 22 to 37 percent. Lamb's-quarters reduced total

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5

Umeda, Kai. "Weed Control in Cole Crops." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/146700.

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6

Tickes, Barry R., and E. Stanley Heathman. "Wheat Weed Control, Yuma County." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/200519.

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7

Umeda, K., N. Lund, D. MacNeil, and D. Robertz. "Grass Weed Control in Melons." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/214922.

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Efficacy of the grass herbicides showed that Select (clethodim) and BAS-620 (BASF Corporation) at rates as low as 0.1 lb AI/A were nearly comparable in controlling 2 leaf stage of growth watergrass or when applied a week later on 3-4 inch tall watergrass. Fusilade DX (fluazifop-p-butyl) was intermediate in controlling grasses and 0.188 lb AI/A was necessary to give equivalent control of larger grasses as compared to the 0.1 lb AI/A rate that gave acceptable control of smaller grasses. Poast (sethoxydim) at 0.188 lb AI/A gave acceptable control of small grasses but lower rates or later timed ap

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8

Umeda, K., and D. MacNeil. "Garbanzo Bean Weed Control Study." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219974.

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Pendimethalin (Prowl7) and oxyfluorfen (Goal7) applied preemergence (PREE) caused minimal injury and gave very good weed control (>90%). Goal and sulfentrazone alone applied postemergence (POST) gave very good weed control at 6 WAT. The combination of Prowl followed by Goal or sulfentrazone gave complete control of all weeds. Goal and sulfentrazone applied POST following PREE treatments gave nearly complete weed control with good crop safety. Clomazone (Command7) caused significant crop injury and stand reduction when applied PREE. Metribuzin (Sencor7) applied POST completely reduced the crop

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9

Umeda, K. "Herbicide Weed Control in Cantaloupes." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/221497.

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Preemergence herbicide treatments metolachlor (Dual®) and pendimethalin (Prowl®) gave better than acceptable weed control ( >85 %) of prostrate and tumble pigweeds, puncturevine, common purslane, and groundcherry in cantaloupes. Preplant incorporated treatments provided less than adequate control of pigweeds and groundcherry. Bentazon (Basagran®) applied postemergence gave good control of pigweeds but groundcherry control was marginal. Napropamide (Devrinol®), trifluralin (Treflan®), and DCPA (Dacthal (D) caused cantaloupe stand reduction and injury. Bensulide (Prefar®) and Basagran® were safe

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10

Umeda, Kai. "Sweet Corn Herbicide Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/221636.

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The sequence of preemergence (PREE) herbicide metolachlor (Dual II®) followed by postemergence (POST) herbicide mixture of primisulfuron plus prosulfuron (Exceed®) provided season-long near complete weed control in sweet corn. Preplant incorporated (PPI) treatments of dimethenamid (Frontier®), EPTC plus safener (Eradicane®), and herbicide mixture FOE 5043 plus metribuzin (Axiom®, Bayer) provided effective weed control for most of the season. Similar effective weed control was observed for PREE treatments of pendimethalin (Prowl®), Frontier, and Axiom.

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11

Umeda, K., G. Gal, and B. Strickland. "Watermelon Herbicide Weed Control Study." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/221654.

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Bensulide (Prefar®), clomazone (Command®), sulfentrazone (FMC), and halosulfuron (FMC) treatments applied preemergence (PREE) gave very good weed control of prostrate pigweed (Amaranthus blitoides), lambsquarters (Chenopodium album), and common purslane (Potulaca oleracea) at 5 weeks after treatment (WAT). Bentazon (Basagran ® and halosulfuron applied postemergence (POST) alone were marginally effective at less than 85% against the pigweed species at 2 WAT and controlled lambsquarters and common purslane. POST treatments following PREE treatments were highly effective to control most weeds. Wa

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12

Umeda, K., G. Gal, and B. Strickland. "Cantaloupe Herbicide Weed Control Study." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/221672.

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Clomazone (Command®), bensulide (Prefar®), sulfentrazone, and halosulfuron treatments applied preemergence (PREE) provided very good control of prostrate pigweed (Amaranthus blitoides), lambsquarters (Chenopodium album), and common purslane (Portulaca oleracea) at better than 90% at 5 weeks after treatment (WAT). Halosulfuron was effective in controlling all weeds better than 90% at 7 WAT Carfentrazone was not effective against most of the weeds present in the test but appeared to be safe on cantaloupe. Postemergence (POST) treatments alone did not provide acceptable control of pigweeds but co

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13

Howatt, Stephen M. (Stephen Michael). "Control of hexazinone tolerant weeds in lowbush blueberries." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61161.

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Field experiments were conducted from 1989 to 1991 to evaluate several sulfonylurea herbicides, glyphosate and clopyralid for the control of bunchberry and other hexazinone tolerant weeds in lowbush blueberry. Broadcast applications of chlorosulfuron, metsulfuron and glyphosate reduced bunchberry densities at all application dates, though crop damage and subsequent yield reductions were unacceptable. Glyphosate was very effective in controlling a large number of plant species when applied as a spot spray treatment. Tribenuron and DPX R9674 were effective in suppressing bunchberry stem densitie

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14

Trembley, Marcella L. "The effect of mechanical weed cultivation on crop yield and quality, disease incidence and phenology in snap bean, carrot and lettuce crops." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0003/MQ29801.pdf.

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15

Kopan, Suzanne. "Mechanical weed control in conservation tillage." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Thesis/Spring2007/s_kopan_010207.pdf.

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16

Godar, Amar S. "Weed control in herbicide-tolerant sunflower." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1682.

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17

Umeda, Kai. "Postemergence Herbicide Weed Control in Onions." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/214728.

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Onions treated at the 2-leaf stage of growth with the 3rd leaf just beginning to emerge with postemergence herbicides bromoxynil (Buctril®) and oxyfluorfen (Goal®) exhibited slight injury at 11 days after treatment (DAT) but had recovered to show no injury at 1 month after treatment (MAT). Annual yellow sweetclover (Melilotus officinalis) was the predominat weed in the test site and early ratings showed that Goal at 0.25 lb a.i. /A and Goal plus Buctril gave marginally acceptable control at 80 %. Buctril alone did not control clover. At 1 MAT, the clovers had recovered from the initial injury

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18

Umeda, Kai. "Postemergence Herbicide Weed Control in Broccoli." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/214734.

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An exploratory field study provided results of postemergence herbicide weed control efficacy and broccoli tolerance. Pyridate (Tough®), clopyralid (Stinger®), and oxyfluorfen (Goal®) did not cause any crop stand reduction compared to bentazon (Basagran®) that completely reduced the broccoli stand. Tough and Goal at the lower rates tested caused marginally acceptable broccoli injury. Goal effectively controlled pigweed species (Amaranthus sp.), groundcherry (Physalis wrightii), and purslane (Portulacç oleracea). Tough gave good control of pigweed and purslane but not groundcherry. Stinger was s

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19

Umeda, Kai. "Broccoli Preemergence Herbicide Weed Control Studies." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/214735.

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Exploratory field studies conducted in broccoli showed that clomazone (Command®) and isoxaben (Gallery®) were extremely phytotoxic to broccoli when applied preemergence (PREE) on the soil surface after planting. Both offered good weed control of the weeds present. Napropamide (Devrinol®) caused moderate crop injury and marginally acceptable weed control.

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20

Umeda, Kai. "Postemergence Herbicide Weed Control in Cantaloupes." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219958.

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The addition of an adjuvant, Agridex, to halosulfuron or Basagran7 (bentazon) did not increase crop injury significantly compared to treatments without Agridex. The addition of Agridex to halosulfuron slightly improved morningglory (Ipomoea hederacea) control compared to without the use of an adjuvant. Bentazon at 1.0 lb/A plus Agridex gave very good morningglory control at 92%. At 2 WAT on 20 Aug, cantaloupe injury decreased for halosulfuron and bentazon treatments. A second application of halosulfuron at 0.05 lb/A did not cause additional crop injury.

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21

Umeda, K. "Sweet Corn Herbicide Weed Control Study." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219975.

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The soil applied herbicides EPTC plus safener (Eradicane7), metolachlor (Dual)7, dimethenamid (Frontier7), pendimethalin (Prowl7), and fluthiamide/metribuzin (Axiom7) applied at planting time all provided very good weed control of pigweeds (Amaranthus spp.), grasses, and puncturevine (Tribulus terrestris). Most of the soil applied followed by POST combination treatments gave very good control (>90%) of lambsquarters (Chenopodium spp.), pigweeds, and groundcherry (Physalis wrightii). POST treatments bentazon (Basagran7), dicamba (Clarity7), and diflufenzopyr plus dicamba (Distinct7) applied alo

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22

Umeda, K., D. MacNeil, D. Roberts, and N. Lund. "Halosulfuron for Weed Control in Watermelon." College of Agriculture, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/220398.

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Halosulfuron at rates ranging from 0.05 to 0.10 lb AI/A with no adjuvant added to the POST application spray did not cause any injury to watermelons. Halosulfuron did not appear to cause significant crop injury earlier in the season to reduce marketable fruit yield at harvest. Halosulfuron was highly effective against London rocket but did not control purslane or groundcherry. Weed control efficacy was improved significantly when Latron CS-7 or Activator-90 was added to halosulfuron at either 0.05 or 0.075 lb AI/A. LI-700 did not improve the activity of halosulfuron over the treatments without

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23

Umeda, K., and C. Fredman. "Preemergence Herbicide Weed Control in Spinach." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/221475.

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Two field studies were conducted to evaluate metolachlor (Dual®) for preemergence weed control in spinach to provide support to gain registration through the IR-4 program. Dual® at 1.0 to 1.5 lb a.i./A gave acceptable control of London rocket, black mustard, lambsquarters, and knotweed. Nettleleaf goosefoot, cheeseweed, and yellow sweetclover control was not acceptable. In one test, dimethenamid (Frontier® or SAN -582H, Sandoz) controlled London rocket, lambsquarters, knotweed, and goosefoot at 0.25 lb ai. /A and did not control cheeseweed or sweetclover. Spinach was not injured by Dual® or Fr

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24

Umeda, K. "Herbicide Weed Control in Sweet Corn." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/221496.

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Preplant incorporated and/or preemergence herbicide treatments including metolachlor (Dual®), EPTC with safener (Eradicane®), cyanazine (Bladex®), pendimethalin (Prowl®), and tank-mix combinations provided good (88 %) to excellent ( >98 %) weed control of prostrate and tumble pigweeds and purslane in sweet corn.

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25

Umeda, Kai, G. Gal, and B. Strickland. "Sweet Corn Herbicide Weed Control Study." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/221671.

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Season-long near complete weed control in sweet corn was achieved with preemergence (PREE) herbicide applications of pendimethalin (Prowl®), metolachlor (Dual®), or thiafluamide/metribuzin (Axiom®) followed by postemergence applications of bentazon (Basagran®) or dicamba (Banvel®). Basagran applied alone POST gave very good control ( >93 %) of lambsquarters (Chenopodium album) and purslane (Portulaca oleracea) but did not adequately control tumble pigweed (Amaranthus albus). Prowl applied alone PREE gave acceptable control of most weeds. POST applications of prosulfuron/primisulfuron (Exceed®)

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26

Umeda, K. "Postemergence Weed Control in Cantaloupe Study." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/221673.

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The postemergence (POST) herbicide treatments did not cause any crop stand reduction following applications. Bentazon (Basagran®) at 0.50 lb AI /A caused marginally acceptable injury on the cantaloupe leaves. At 2 weeks after treatment (WAT), the amount of injury decreased and cantaloupe treated with Basagran at 1.0 lb AI/A showed marginally acceptable injury symptoms. Halosulfuron (Monsanto) at 0.05 to 0.10 lb AI/A caused slightly more injury (10 to 17 %) with increasing rates. Basagran at 1.0 lb Al/A gave good control ( >90 %) of morningglory and was marginal in controlling morningglory at 0

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27

Baraibar, Padró Bàrbara. "Seed predators and weed seed predation for weed control in winter cereals." Doctoral thesis, Universitat de Lleida, 2011. http://hdl.handle.net/10803/31991.

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La depredació de llavors pot causar pèrdues significatives de llavors de males herbes en sistemes agrícoles i, per tant, pot contribuir al control de les arvenses. Actualment, el coneixement existent sobre la identitat i la contribució relativa dels diferents depredadors de llavors, i dels factors que limiten aquesta depredació és escàs. Aquest estudi té com a objectiu contribuir a augmentar aquest coneixement pel cas específic del cereals d’hivern a les zones semi-àrides del nord-est espanyol. Tradicionalment, aquesta zona ha estat de secà i caracteritzada per un intens treball del sòl.

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28

Beamer, Kenneth Paul. "Weed Management and Soil Quality Outcomes of Non-Chemical Weed Control Tactics." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/28854.

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In the Northern Great Plains (NGP), weed management within organic systems remains a challenge. Experiments were conducted at two distinct sites in North Dakota to investigate effects of deep mulch no-till (NT) on soil quality indices, weed densities, and weed seedbank densities. We hypothesized that alfalfa mulch no-till and arbuscular mycorrhizal fungi (AMF) inoculant would be associated with reductions in weed densities and improvements to soil quality and vegetable yield. NT treatments were associated with reductions in weed densities and time required for weeding, with improvements in soi

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29

McCloskey, William B., Paul B. Baker, and Will Sherman. "Survey of Cotton Weeds and Weed Control Practice in Arizona Upland Cotton Fields." College of Agriculture, University of Arizona (Tucson, AZ), 1998. http://hdl.handle.net/10150/210369.

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The distribution of weed species and the herbicides and cultural practices used to control weeds in Arizona cotton fields were surveyed in 1995 and 1996. The most common weeds were purple nutsedge, bermudagrass, annual morningglory, Palmer amarnath, Wright groundcherry, common purselane, yellow nutsedge and Johnsongrass. The average statewide cost for hand weeding in 1995 was reported as $27.87 per acre in addition to other weed control costs. Statewide, most growers used preemergence herbicides before or at planting and used pre- and post-emergence herbicides later in the season. Most of thes

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30

Poliquin, Bernard. "Quackgrass [Agropyron repens (L.) Beauv.] control in potatoes with quizalofop-ethyl." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59287.

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Field trials were conducted to evaluate the effect of quizalofop-ethyl on quackgrass plants in a potato cropping sequence. Fall and summer applications were compared for their quackgrass control potential. Season-long quackgrass control was obtained with quizalofop-ethyl at 96 g/ha following summer application. An increase in the rate of quizalofop-ethyl did not further improve control. Yields with quizalofop-ethyl at 96 g/ha were similar to standard treatments sethoxydim and fluazifop-butyl at recommended rates. Quackgrass control following a summer application was not maintained through to t

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31

Case, Luke Thomas. "Herbicide-treated mulches for ornamental weed control." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1399623802.

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32

Mellendorf, Tracy G. "Control of spring weed vegetation with saflufenacil /." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1796330141&sid=10&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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33

Nigh, Edward L. Jr. "Weed Control Investigations in Deserted Irrigated Asparagus." College of Agriculture, University of Arizona (Tucson, AZ), 1989. http://hdl.handle.net/10150/214283.

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34

Umeda, Kai. "Sweet Corn Tolerance and Herbicide Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/214727.

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No observable injury was evident by any herbicide treatment on any of the twelve sweet corn varieties during the season. Overall, pendimethalin (Prowl®) treatments applied preemergence (PREE) provided very good control ( >87 %) of all weeds rated. Metolachlor (Dual®), EPTC plus safener (Eradicane®), dimethanamid (Frontier®), and cyanazine ( Bladex®) treatments gave good control ( >80 %) of pigweeds ( Amaranthus sp.) and purslane (Portulaca oleraceq) with annual yellow sweetclover (Melilotus ocf`icinalis) not adequately controlled. All treatments except Bladex alone gave good control of volunte

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35

Umeda, Kai, and Chris Fredman. "Soil-Applied Herbicide Weed Control in Cantaloupes." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/214733.

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Several registered and exploratory herbicides were effective for broadleaved weed control when applied preplant incorporated or preemergence in cantaloupes. Bensulide (Preface), clomazone (Command®), cyanazine (Bladex®), dimethanamid (Frontier®), ethafluralin (Curbit®), metolachlor (Dual ®), pendimethalin (Prowl®), trifluralin, dithiopyr (Rohm and Haas), and thiazopyr (Rohm and Haas) gave marginally acceptable control of most weeds. Crop injury was observed for some treatments of Frontier, Prowl, napropamide (Devrinol®), and Command. As the season progressed, groundcherry (Physalis wrightii) w

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36

Umeda, K., and N. Lund. "Preemergence Herbicides for Weed Control in Melons." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/214936.

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All herbicide treatments, Prefar, Frontier, Dual Magnum, Valor, and Prefar combined with Dual Magnum or Frontier caused less than 10% injury on cantaloupes. Frontier at 0.75 lb AI/A, Dual Magnum at 1.0 lb AI/A, Valor at 0.03 and 0.05 lb AI/A controlled weeds similar to Prefar. Prefar at 4.0 lb AI/A combined with Frontier controlled tumble pigweed (94%), narrowleaf lambsquarters (95%), Wright’s groundcherry (97%), and horse purslane (94%). None of the preemergence herbicide treatments controlled purple nutsedge.

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37

Umeda, K., and D. MacNeil. "Early Postemergence Herbicide Weed Control in Onions." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219956.

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Onions treated with bromoxynil (Buctril7) or oxyfluorfen (Goal7) at the time when the first true leaf was emerging were not injured. No significant onion crop stand reduction occurred from any of the postemergence (POST) treatments. Onion height was not affected by any of the POST treatments through the season. A single application of Goal or Buctril offered up to 7 WAT of very good weed control with excellent crop safety. Onions treated at the typical 2-leaf stage of growth with Buctril or Goal exhibited no significant crop injury. Delayed and reduced control of knotweed (Polygonum aviculare)

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38

Umeda, Kai. "Evaluation of Herbicides for Cantaloupe Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219957.

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At 4 weeks after treatment (WAT), all preemergence (PREE) treatments were completely safe on cantaloupes. At 1 WAT of postemergence (POST) applications, marginally acceptable melon injury (11 to 19%) was observed. At 6 WAT, crop injury increased significantly for both halosulfuron and bentazon. Halosulfuron (POST) following bensulide (PREE) caused minimal crop injury. The pigweeds were marginally controlled when POST treatments followed PREE herbicides. Tumble pigweed (Amaranthus albus) was more difficult to control than prostrate pigweed (A. blitoides). Halosulfuron gave good control of nutse

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39

Umeda, K., and D. MacNeil. "Preemergence Herbicide Combinations for Onion Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219959.

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Most herbicides applied alone preemergence (PREE) caused minimal crop injury (<10%) when furrow irrigated. Pendimethalin (Prowl) applied at 0.5 lb AI/A plus bensulide (Prefar) at 6.0 lb AI/A under sprinkler irrigation in Tolleson caused crop injury that was highly unacceptable and the crop stand was severely reduced. Onion yields were significantly reduced for the Prowl plus Prefar treatments. Prowl at 0.25 or 0.5 lb AI/A alone provided very good (>90%) weed control of all weeds. Combination treatments of Prowl plus other herbicides provided very good weed control but did not offer enhanced co

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40

Umeda, K., D. MacNeil, N. Lund, and D. Robertz. "Prowl and Prefar for Onion Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219960.

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Pendimethalin (Prowl7) applied preemergence (PREE) at 0.25 to 0.50 lb AI/A caused no observable injury and did not affect yields of onions that were furrow irrigated . Prowl applied PREE at 0.50 lb AI/A caused significant crop stand and yield reduction compared to lower rates or the untreated check under sprinkler irrigation. Prowl applied preplant incorporated (PPI) at rates ranging from 0.25 to 0.75 lb AI/A did not significantly injure onions or cause a significant yield reduction. Combination treatments of Prowl plus bensulide (Prefar7) applied PREE did not cause any measurable crop height

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41

Umeda, K., and C. Fredman. "Early Postemergence Herbicide Weed Control in Onions." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/221477.

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Oxyfluorfen (Goal®) herbicide at 0.125 to 0.25 lb. a.i./A applied postemergence (POST) to onions at the 3-leaf stage of growth effectively controlled London rocket, yellow sweetclover, and prostrate pigweed with marginal injury to onions. Earlier POST applications on 1- and 2-leaf onions caused injury and some stand reduction. Bromoxynil (Buctril®) herbicide at 0.25 lb. a.i./A applied early POST gave generally good weed control but did not adequately control sweetclover. Buctril® applied in clear weather did not injure 1-leaf onions but caused severe injury on 2- and 3-leaf onions when applied

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Mellendorf, Tracy. "Control of spring weed vegetation with saflufenacil." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/theses/502.

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Field and greenhouse studies were conducted in 2007 and 2008 to evaluate the foliar efficacy of saflufenacil on horseweed (Conyza canadensis (L.) Cronq.). In the field, saflufenacil applied alone at the lowest rate (25 g/ha) resulted in less control than all other herbicide treatments that included saflufenacil. The addition of glyphosate to 25 g/ha of saflufenacil increased the level of control over either herbicide applied alone. However, the addition of glyphosate to 50 g/ha of saflufenacil or greater was not beneficial because saflufenacil alone provided at least 95% control. Overall, hors

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Li, Bo. "Studies of weed-crop competition." Thesis, University of East Anglia, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262269.

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Perron, France. "Weed response to weed control, tillage and nutrient source in a corn-soybean rotation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0025/MQ50854.pdf.

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Umeda, Kai, and Gabriel Towers. "Postemergence Herbicides for Broadleaved Weed Control in Dormant Bermudagrass Control." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2006. http://hdl.handle.net/10150/216652.

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The treatments that included 2,4-D, mecoprop, and dicamba effectively controlled burclover and malva in the dormant bermudagrass turf. The addition of carfentrazone to the hormonal herbicides (Speedzone*) appeared to enhance malva control earlier than the other treatments. Surge* containing sulfentrazone with hormonal herbicides gave the highest degree of malva control. Fluroxypyr (Spotlight*) was not effective against burclover and showed moderate control of malva in this test.

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McCully, K. V. "Weed problems in Nova Scotia blueberry fields." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63910.

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De, Luna Lilian Z. "Pathogenicity of the three Curvularia isolates to Cyperaceae weeds and rice, Oryza sativa L." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=35869.

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Three isolates of Curvularia belonging to Curvularia tuberculata (isolates 93-020 and 93-022) and Curvularia oryzae (isolate 93-061) were obtained from diseased Cyperus difformis, Cyperus iria, and Fimbristylis miliacea, respectively, in the Philippines in 1993. Under greenhouse conditions, these fungal isolates caused high mortality and significant plant dry weight reduction in C. difformis, C. iria, and F. miliacea when sprayed at the rate of 1 x 108 spores/m3. Cross-pathogenicity of the isolates was demonstrated in three other sedge weed species. C. difformis, C. iria, and F. miliacea were

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Rana, Aman. "Optimizing Weed Management via Microwave Irradiation." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/75115.

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One potential alternative to chemical weed control is the use of microwave radiation, a particular form of indirect thermal weeding. Absorption of microwave radiation causes water molecules within the tissue to oscillate, thereby converting electromagnetic energy into heat. This technique is rapid, versatile and effective, as the electromagnetic waves heat the plant tissue and destroy cellular integrity. The objective of this research was to evaluate the potential use of dielectric heating for weed management. Ten weed species representing monocots and dicots were selected for this study:

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Haring, Steven C. "Harvest Weed Seed Control: An Integrated Weed Management Strategy for Organic and Conventional Production Systems." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78827.

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Harvest weed seed controls (HWSC) destroy weed seeds that are retained by the plant at crop harvest, which would typically be spread by the harvester along with other field residues. HWSC exploits coincidental maturity between crops and weeds, so an experiment was designed to collect weed seeds as they shatter throughout the growing season and through a simulated harvest delay. This experiment monitored four economically important broadleaf species and two grass species in a soybean (Glycine max (L.) Merr.) field. Results indicated that broadleaf species shattered seed at rates accelerating th

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Ritter, Carina. "Evaluation of weed populations under the influence of site-specific weed control to derive decision rules for a sustainable weed management." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:100-opus-2687.

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