Previsual detection of stressed coniferous trees

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dc.contributor.authorAlger, Larry Allenen
dc.contributor.committeechairHeikkenen, Herman Johnen
dc.contributor.committeememberGrayson, James McD.en
dc.contributor.committeememberBunce, George Edwinen
dc.contributor.committeememberAleida, S. P.en
dc.contributor.departmentEntomologyen
dc.date.accessioned2014-03-14T21:29:15Zen
dc.date.adate2009-02-13en
dc.date.available2014-03-14T21:29:15Zen
dc.date.issued1974-05-06en
dc.date.rdate2009-02-13en
dc.date.sdate2009-02-13en
dc.description.abstractThe study consisted of two parts: following the fade rates of killed field-grown Virginia pine (<u>Pinus virginiana</u> Mill.); and to study the effects of different stresses on seedlings. Foliage fade rates of killed field-grown Virginia pine varied with the time of the year the tree was killed. Little variation in fade rates was found between years. Foliage of seedlings grown under stress due to: girdling; sevpring; defoliating; and drought, were studied by paper chromntographv, cross sectioning, and photography. The four pigments found appeared to decline proportionately as the foliage went from green to red. An error in technique resulted in uninterpretable needle cross sections. Photography using black and white, black and white infrared, color, and color infrared films gave no previsual detection of stress.en
dc.description.degreeMaster of Scienceen
dc.format.extent48 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-02132009-172201en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-02132009-172201/en
dc.identifier.urihttp://hdl.handle.net/10919/41077en
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1974.A4.pdfen
dc.relation.isformatofOCLC# 37591845en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectfoliage fadeen
dc.subject.lccLD5655.V855 1974.A4en
dc.titlePrevisual detection of stressed coniferous treesen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineEntomologyen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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