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Factors Affecting Toxicity and Translocation of Glyphosate in Cotton (Gossypium hirsutum)

Published online by Cambridge University Press:  12 June 2017

G. D. Wills*
Affiliation:
Delta Branch of the Mississippi Agric. and For. Exp. Stn., Stoneville, MS 38776

Abstract

Toxicity of nonradiolabeled and translocation of 14C-labeled glyphosate [N-(phosphonomethyl)glycine] in cotton (Gossypium hirsutum L.) were evaluated under different environmental conditions as affected by surfactant and by the maturity of the plant tissue at the place of herbicide application. Toxicity was affected primarily by temperature with 21 to 40% greater cotton injury at 25 C than at 35 C. The addition of surfactant often increased toxicity under environmental conditions where toxicity was initially low. Absorption and translocation of 14C was affected primarily by relative humidity (RH). At constant temperature and rate of surfactant, an increase in RH from 40 to 100% resulted in a 3- to 6-fold increase in translocation of 14C. Autoradiograms indicated that the movement of the 14C-label was primarily into leaves above the treated area. Translocation of 14C was significantly greater following application to the mature lower stem than to the mature lower leaves or to immature upper stem or leaves of cotton.

Type
Research Article
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

Literature Cited

1. Baird, D. D. and Upchurch, R. P. 1972. Postemergence characteristics of a new herbicide, MON-0468 on johnsongrass. Proc. South Weed Sci. Soc. 25:113116.Google Scholar
2. Crafts, A. S. 1961. Translocation in Plants. Holt, Rinehart, and Winston. New York. 182 pp.Google Scholar
3. Crafts, A. S. and Yamaguchi, . 1964. The autoradiography of plant materials. California Agric. Exp. Stn. and Ext. Serv. Manual 35. 143 pp.Google Scholar
4. Hurst, H. R. 1976. Cotton tolerance to glyphosate when applied with the recirculating sprayer. Abstr. Proc. Beltwide Cotton Prod. Res. Conf. p. 46.Google Scholar
5. Jordan, T. N. 1977. Effects of temperature and relative humidity on the toxicity of glyphosate to bermudagrass (Cynodon dactylon) . Weed Sci. 25:448451.CrossRefGoogle Scholar
6. Jordan, T. H. and Bridge, R. R. 1976. Selectivity of glyphosate to cotton cultivars, johnsongrass, and bermudagrass. Proc. South. Weed Sci. Soc. 29:5357.Google Scholar
7. Jordan, T. N. and Baker, R. S. 1975. Control of bermudagrass in cotton. Mississippi Agric. For. Exp. Stn. Res. Rep. 1(20):looseleaf publ. n.p. Google Scholar
8. McWhorter, C. G. 1972. Toxicity of MON-0468 to johnsongrass and soybeans. Proc. South. Weed Sci. Soc. 25:117.Google Scholar
9. McWhorter, C. G. 1974. Effect of environment on the toxicity of glyphosate to soybeans and johnsongrass. Abstr. Weed Sci. Soc. Am. p. 118.Google Scholar
10. McWhorter, C. G. and Wills, G. D. 1978. Factors affecting the translocation of 14C-mefluidide in soybeans (Glycine max) and common cocklebur (Xanthium pensylvanicum) . Weed Sci.: (In press).Google Scholar
11. McWhorter, C. G. and Jordan, T. N. 1976. Effects of adjuvants and environment on the toxicity of dalapon to johnsongrass. Weed Sci. 24:257260.Google Scholar
12. McWhorter, C. G. and Jordan, T. N. 1976. Factors affecting dalapon absorption and translocation in johnsongrass. Physiol. Plant. 38:166170.CrossRefGoogle Scholar
13. McWhorter, C. G. and Azlin, W. R. 1978. Effects of environment on the toxicity of glyphosate to johnsongrass (Sorghum halepense) and soybeans (Glycine max) . Weed Sci.:(In press).Google Scholar
14. Norton, K. R. and Merkle, M. G. 1976. Fall applied herbicides for controlling johnsongrass. Proc. South. Weed Sci. Soc. 29:61.Google Scholar
15. Overton, J. R., Mullins, J. A., and Jeffery, Larry. 1973. Response of cotton, soybeans, and johnsongrass to glyphosate. Proc. South. Weed Sci. Soc. 26:28–25.Google Scholar
16. Prasad, R., Foy, C. L., and Crafts, A. S. 1967. Effect of relative humidity on absorption and translocation of foliarly applied dalapon. Weeds 15:149156.CrossRefGoogle Scholar
17. Sprankle, P., Meggitt, W. F., and Penner, Donald. 1975. Absorption, action, and translocation of glyphosate. Weed Sci. 23:235240.Google Scholar
18. Wills, G. D. 1975. Evaluation of glyphosate for postemergence control of purple nutsedge in cotton. Proc. South. Weed Sci. Soc. 28:5457.Google Scholar
19. Wills, G. D. 1975. Toxicity of glyphosate to cotton as affected by leaf maturity. Abstr. Weed Sci. Soc. Am. p. 62.Google Scholar
20. Wills, G. D. 1976. Translocation of bentazon in soybeans and common cocklebur. Weed Sci. 24:536540.Google Scholar
21. Wills, G. D. 1976. Translocation of 14C-methazole in cotton. Weed Sci. 24:370374.Google Scholar