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Pubescence Affects Spectra and Imagery of Silverleaf Sunflower (Helianthus argophyllus)

Published online by Cambridge University Press:  12 June 2017

H.W. Gausman ,
R.M. Menges ,
D.E. Escobar ,
J.H. Everitt  and
R.L. Bowen
H.W. Gausman
Affiliation:
This study was conducted at Weslaco, Texas. Plant Physiol., Hortic., Biol. Tech., Range Conserv., and Photographer, respectively. This study was supported in part by the National Aeron. and Space Admin. under Contract No. S-53876-AG, Southern Region, Agric. Res. Serv., U. S. Dep. Agric., Weslaco, TX 78596
R.M. Menges
Affiliation:
This study was conducted at Weslaco, Texas. Plant Physiol., Hortic., Biol. Tech., Range Conserv., and Photographer, respectively. This study was supported in part by the National Aeron. and Space Admin. under Contract No. S-53876-AG, Southern Region, Agric. Res. Serv., U. S. Dep. Agric., Weslaco, TX 78596
D.E. Escobar
Affiliation:
This study was conducted at Weslaco, Texas. Plant Physiol., Hortic., Biol. Tech., Range Conserv., and Photographer, respectively. This study was supported in part by the National Aeron. and Space Admin. under Contract No. S-53876-AG, Southern Region, Agric. Res. Serv., U. S. Dep. Agric., Weslaco, TX 78596
J.H. Everitt
Affiliation:
This study was conducted at Weslaco, Texas. Plant Physiol., Hortic., Biol. Tech., Range Conserv., and Photographer, respectively. This study was supported in part by the National Aeron. and Space Admin. under Contract No. S-53876-AG, Southern Region, Agric. Res. Serv., U. S. Dep. Agric., Weslaco, TX 78596
R.L. Bowen
Affiliation:
This study was conducted at Weslaco, Texas. Plant Physiol., Hortic., Biol. Tech., Range Conserv., and Photographer, respectively. This study was supported in part by the National Aeron. and Space Admin. under Contract No. S-53876-AG, Southern Region, Agric. Res. Serv., U. S. Dep. Agric., Weslaco, TX 78596
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Abstract

Silverleaf sunflower (Helianthus argophyllus Torr. & Gray) is a weed in the sandy soils of south and southeast Texas. The young plant parts are densely white-tomentose. This pubescence greatly increased laboratory and field-measured light reflectance over the 0.5- to 2.5-μm waveband compared with the sparsely-hairy leaves of common sunflower (Helianthus annum L.). This increased reflectance caused silverleaf sunflower's image on Eastman Kodak Aerochrome infrared color type 2443 film to be “pinkish” compared with darker magenta images for other plant species. Therefore, aerial photography may be useful to distinguish silverleaf sunflower plants from other plant species to locate its endemic areas, monitor its spread, and delineate areas needing weed control.

Type
Research Article
Information
Weed Science , Volume 25 , Issue 5 , September 1977 , pp. 437 - 440
Copyright
Copyright © 1977 by the Weed Science Society of America 

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References

Literature Cited

1. Allen, W.A. and Richardson, A.J. 1971. Calibration of a laboratory spectrophotometer for specular light by means of stacked glass plates. Rev. Sci. Instrum. 42:1813–1817.CrossRefGoogle Scholar
2. Billings, W.D. and Morris, R.J. 1951. Reflection of visible and infrared radiation from leaves of different ecological groups. Amer. J. Bot. 38:327–331.CrossRefGoogle Scholar
3. Coblentz, W.W. 1913. The diffuse reflecting power of various substances. Bur. Stand., Bull. 9:283–325.Google Scholar
4. Correll, D.S. and Johnston, M.D. 1970. Manual of the vascular plants of Texas. Texas Research Foundation, Renner, Texas, 1881 pp.Google Scholar
5. Ehleringer, J., Björkman, O., and Mooney, H.A. 1976. Leaf pubescence: Effects on absorptance and photosynthesis in a desert shrub. Science 192:376–377.CrossRefGoogle Scholar
6. Gates, D.M. and Tantraporn, W. 1952. The reflectivity of deciduous trees and herbaceous plants in the infrared to 25 microns. Science 115:613–616.Google Scholar
7. Gausman, H.W., Allen, W.A., Cardenas, R., and Brown, R.L. 1970. Color photos, cotton leaves and soil salinity. Photogramm. Eng. 36:454–459.Google Scholar
8. Gausman, H.W. and Cardenas, R. 1969. Effect of leaf pubescence of Gynura aurantiaca on light reflectance. Bot. Gaz. 130:158–162.CrossRefGoogle Scholar
9. Heilman, M.D., Gonzalez, C.L., Swanson, W.A., and Rippert, W.J. 1968. Adaptation of a linear transducer for measuring leaf thickness. Agron. J. 60:578–579.Google Scholar
10. Horwitz, W. (ed.). 1965. Official methods of analysis, ed. 10, Assoc. Offic. Agric. Chemists, Washington, D.C. 957 pp.Google Scholar
11. Jensen, W.A. 1962. Botanical histochemistry. W. H. Freeman & Co., San Francisco. 408 pp.Google Scholar
12. Jones, F.B. 1975. Flora of the Texas coastal bend. Welder Wildlife Foundation, Sinton, Texas. 262 pp.Google Scholar
13. Leamer, R.W., Myers, V.I., and Silva, L.F. 1973. A spectroradiometer for field use. Rev. Sci. Instrum. 44:611–614.Google Scholar
14. Pearman, G.I. 1966. The reflection of visible radiation from leaves of some western Australian species. Aust. J. Biol. Sci. 19:97–103.Google Scholar
15. Shull, C.A. 1929. A spectrophotometric study of reflection of light from leaf surfaces. Bot. Gaz. 87:583–607.Google Scholar
16. Steel, R.G.D. and Torrie, J.H. 1960. Principles and procedures of statistics. McGraw-Hill, New York. 481 pp.Google Scholar