The implications of light quality for weed control

dc.contributor.advisorSwanton, C.J.
dc.contributor.authorCressman, Scott Tyler
dc.date.accessioned2020-08-24T15:53:08Z
dc.date.available2020-08-24T15:53:08Z
dc.date.copyright2010
dc.degree.departmentDepartment of Plant Agricultureen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.description.abstractCrop seedlings have the ability to detect the presence of neighbouring weeds by means of the R:FR ratio reflected from the weeds leaf surfaces. The role of the R:FR ratio as a weed management tool has not been explored. Laboratory experiments were conducted to test the following hypotheses: 1) the persistence of R:FR ratio reflected from the leaf surface of weeds treated with herbicides is dependent upon herbicide chemistry and dose, and 2) weeds species differ in their ability to reflect R:FR ratio and these differences are dependent on seedling growth, leaf area, and distance from the weed canopy. Results of this study confirm that the R:FR ratio reflected from the leaf surface of weeds is affected by: herbicide chemistry, herbicide dose, weed species, stage of weed development and distance of the weed from the crop. This information is of particular importance to herbicide selection and application timing of postemergence herbicides.
dc.identifier.urihttps://hdl.handle.net/10214/20487
dc.language.isoen
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectcrop seedlings
dc.subjectweeds
dc.subjectweed management tool
dc.subjectred/far-red ratio
dc.subjectlight quality
dc.subjectherbicide
dc.subjectleaf surface
dc.subjectreflection
dc.titleThe implications of light quality for weed control
dc.typeThesisen_US

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