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United States Department of Agriculture

Agricultural Research Service


item Maw, B
item Stephenson, M
item Ritchie, G
item Mullis, S
item Thomson, Steven

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 2/16/2006
Publication Date: 2/16/2006
Citation: Maw, B.W., Stephenson, M.G., Ritchie, G.L., Mullis, S.W., Thomson, S.J. 2006. Comparing methods fo measuring reflectance and thermal emissivity of leaves under stress. Meeting Abstract. Presented at the 42nd Tobacco Workers Conference, Charleston, SC. CD-ROM

Interpretive Summary: Not needed for Abstract

Technical Abstract: Reflecrtance and emissivity in infrared wavebands have been used to distinguish between diseased and healthy plant leaves. Photographs of leaves from both healthy plants and plantsinfected with the Tomato Spotted Wilt Virus have shown indications of relectance value variations accordingto disease infection. Photographs have been taken of plants in the field during Summer as well as plants grown in pots in the greenhouse during Autumn and Winter, Diseased plants in the field were recognized by visual observation. Diseased plantsin the greenhouse were identified by those known to have been inoculated. During the summer additional observations were made with a spectroradiometer. Deifferences have been osderved between the reflectance of near infrared radiation from diseased plants and that from healthy plants, the relectance for diseased plants being lower than that from healthy plants.

Last Modified: 06/28/2017
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