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Measuring Herbicide Injury to Soybeans (Glycine max) Using a Radiometer

Published online by Cambridge University Press:  12 June 2017

Timothy E. Adcock ,
Forrest W. Nutter Jr.  and
Philip A. Banks
Timothy E. Adcock
Affiliation:
Dep. Agron., Univ. Georgia, Athens, GA 30602
Forrest W. Nutter Jr.
Affiliation:
Dep. Plant Path., Univ. Georgia, Athens, GA 30602
Philip A. Banks
Affiliation:
Dep. Agron., Univ. Georgia, Athens, GA 30602
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Abstract

Light reflectance from soybean foliage was compared to visual evaluations for assessing soybean injury caused by postemergence-applied paraquat and glyphosate. Coefficients of variation and of determination from multiple linear regressions for both herbicides indicated that reflectance was better correlated with injury measured by changes in leaf number, leaf weight, and stem weight than visual evaluations. Correlation coefficients among radiometer readings taken by different individuals were ≥0.98 for both herbicides. Correlation coefficients among visual evaluators ranged from 0.69 to 0.96 and from 0.74 to 0.94 for plots treated with paraquat and glyphosate, respectively. Light reflectance measured with a radiometer may be useful in evaluating injury from herbicides that cause chlorosis, necrosis, or defoliation of the target species.

Keywords

Soybeans, Glycine max L. ‘Gordon’paraquat, 1,1′-dimethyl-4,4′-bipyridinium ionglyphosate, N-(phosphonomethyl)glycineVisual evaluationsinjury assessmentparaquatglyphosate
Type
Special Topics
Information
Weed Science , Volume 38 , Issue 6 , November 1990 , pp. 625 - 627
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

Literature Cited

1. Amrhein, N., Hollander-Czytko, H., Leifeld, J., Schulz, A., Steinrucken, H. C., and Topp, H. 1982. Inhibition of the shikimate pathway by glyphosate. Pages 21–31 in Journees internationales d'etudes du Groupe Polyphenols. Bulletin de Liaison. Vol. II. Boudet, A. M. and Ranjeva, R., eds. Toulouse.Google Scholar
2. Ashton, F. M. and Crafts, A. S. 1981. Bipyridyliums. Pages 164–175 in Mode of Action of Herbicides. 2nd ed. John Wiley and Sons, New York.Google Scholar
3. Ashton, F. M. and Crafts, A. S. 1981. Glyphosate. Pages 234–249 in Mode of Action of Herbicides. 2nd ed. John Wiley and Sons, New York.Google Scholar
4. Davies, P. J. and Seaman, D. E. 1968. The tetrazolium reaction as a measure of the action of diquat in elodea. Weed Sci. 16:329–333.Google Scholar
5. Nutter, F. W. Jr. 1987. Detection of plant disease gradients using a hand-held, multispectral radiometer. Phytopathology. 77:643.Google Scholar
6. Nutter, F. W. Jr., Littrell, R. H., and Pederson, V. D. 1985. Use of a low-cost, multispectral radiometer to estimate yield loss in peanuts caused by late leaf spot (Cercosporidium personatum). Phytopathology. 75:50.Google Scholar
7. Shea, P. J. and Weber, J. B. 1983. Effect of soil pH on fluridone activity and persistence as determined by chlorophyll measurements. Weed Sci. 31:347–350.Google Scholar
8. Sweet, R. D. 1975. Comments on rating systems in weed science. Proc. Northeast. Weed Sci. Soc. 29:264–268.Google Scholar
9. Ting, I. P. 1982. Plant physiology. Addison-Wesley Publ. Co., Reading, MA. Pages 66–80.Google Scholar
10. Vanstone, D. E. and Stobbe, E. H. 1977. Electrolytic conductivity–a rapid measure of herbicide injury. Weed Sci. 25:352–354.Google Scholar