Type of Document	Master's Thesis
Author	Alger, Larry Allen
URN	etd-02132009-172201
Title	Previsual detection of stressed coniferous trees
Degree	Master of Science
Department	Entomology
Advisory Committee	Advisor Name Title Heikkenen, Herman John Committee Chair Aleida, S. P. Committee Member Bunce, George Edwin Committee Member Grayson, James McD. Committee Member
Keywords	foliage fade
Date of Defense	1974-05-06
Availability	restricted
Abstract The study consisted of two parts: following the fade rates of killed field-grown Virginia pine (Pinus virginiana 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 foliege 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.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access  LD5655.V855_1974.A4.pdf 3.01 Mb 00:13:55 00:07:09 00:06:15 00:03:07 00:00:16 next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.

If you have questions or technical problems, please Contact DLA.