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Detection of False Broomweed (Ericameria austrotexana) by Aerial Photography

Published online by Cambridge University Press:  12 June 2017

James H. Everitt
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., P.O. Box 267, Weslaco, TX 78596; Texas Tech. Univ., Plant Stress and Water Cons. Res. Unit, Lubbock, TX 79409; and P.O. Box 748, Temple, TX 76503
Sammy J. Ingle
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., P.O. Box 267, Weslaco, TX 78596; Texas Tech. Univ., Plant Stress and Water Cons. Res. Unit, Lubbock, TX 79409; and P.O. Box 748, Temple, TX 76503
Harold W. Gausman
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., P.O. Box 267, Weslaco, TX 78596; Texas Tech. Univ., Plant Stress and Water Cons. Res. Unit, Lubbock, TX 79409; and P.O. Box 748, Temple, TX 76503
Herman S. Mayeux Jr.
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., P.O. Box 267, Weslaco, TX 78596; Texas Tech. Univ., Plant Stress and Water Cons. Res. Unit, Lubbock, TX 79409; and P.O. Box 748, Temple, TX 76503

Abstract

False broomweed (Ericameria austrotexana M.C. Johnst.) had lower near-infrared (0.75- to 0.90-μm waveband) reflectance than did six other associated rangeland species and mixed herbaceous vegetation. False broomweed's low near-infrared reflectance was attributed to its erectophile (erect-leaf) canopy structure. Other species had planophile (horizontal-leaf) or intermediate-leaf orientation. False broomweed's low near-infrared reflectance caused its image to be dark reddish-brown on color-infrared (0.50- to 0.90-μm waveband) film, compared with red or magenta images of other rangeland species. Microdensitometric measurements made on the film showed that false broomweed had significantly higher optical counts than those of associated species and mixtures of species.

Type
Weed Biology and Ecology
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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