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Effects of Environment on the Toxicity of Glyphosate to Johnsongrass (Sorghum halepense) and Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

C. G. McWhorter  and
W. R. Azlin
C. G. McWhorter
Affiliation:
South. Weed Sci. Lab., Sci. Ed. Admin., Fed. Res., U.S. Dep. Agric., Stoneville, MS 38776
W. R. Azlin
Affiliation:
South. Weed Sci. Lab., Sci. Ed. Admin., Fed. Res., U.S. Dep. Agric., Stoneville, MS 38776
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Abstract

Johnsongrass [Sorghum halepense (L.) Pers.] and soybeans [Glycine max (L.) Merr. ‘Lee 68’] were treated over-the-top with glyphosate [N-(phosphonomethyl)glycine] at 0.2 and 0.4 kg/ha with surfactant in spray solutions and 0.4 and 0.7 kg/ha without surfactant in spray solutions. Treated plants were maintained in the growth chamber for 2 weeks after treatment at 24, 29, and 35 C; 45 and 100% relative humidity (RH); and 12 and 20% soil moisture. Glyphosate at 0.4 kg/ha applied without surfactant controlled johnsongrass better at 100% than at 45% RH. Johnsongrass control was better with 20% than with 12% soil moisture. Averaged over all evironments, the order of glyphosate toxicity to johnsongrass at 0.4 and 0.7 kg/ha was 35 C > 29 C > 24 C. The environmental condition of 45% RH and 12% soil, moisture resulted in least johnsongrass control regardless of temperature. The order of glyphosate toxicity to soybeans when applied without surfactant was 24 C > 29 C > 35 C. Glyphosate applied without surfactant was more toxic to soybeans at 100% than at 45% RH and more toxic at 12% than at 20% soil moisture. Surfactant in spray solutions increased glyphosate toxicity to johnsongrass and soybeans.

Keywords

Adjuvantsurfactantweed-control
Type
Research Article
Information
Weed Science , Volume 26 , Issue 6 , November 1978 , pp. 605 - 608
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

Literature Cited

1. Burt, G. W. and Wedderspoon, I. M. 1971. Growth of Johnsongrass selections under different temperatures and dark periods. Weed Sci. 19:419–423.CrossRefGoogle Scholar
2. Burton, G. W., Jackson, J. E., and Knox, F. E. 1959. The influence of light reduction upon the production, persistence, and chemical composition of coastal bermudagrass, Cynodon dactylon . Agron. J. 51:537–542.Google Scholar
3. Clor, M. A., Crafts, A. S., and Yamaguchi, S. 1962. Effect of high humidity on translocation of foliar-applied labeled compounds in plants. Part I. Plant Physiol. 37:609–617.CrossRefGoogle ScholarPubMed
4. Cornell, J. T. and Jeffery, L. S. 1977. Johnsongrass control systems in no-till soybeans. Proc. South. Weed Sci. Soc. 30:75–80.Google Scholar
5. Dudek, C., Basler, E., and Santelmann, P. W. 1973. Absorption and translocation of terbutryn and propazine. Weed Sci. 21:440–442.Google Scholar
6. Foy, C. L. 1961. Absorption, distribution, and metabolism of 2,2-dichloropropionic acid in relationship to phytotoxicity. II. Distribution and metabolic fate of dalapon in plants. Plant Physiol. 36:698–709.Google Scholar
7. Foy, C. L. 1962. Absorption and translocation of dalapon 2-C14 and -CI36 in Tradescantia fluminencis . Weeds 10:97–100.Google Scholar
8. Foy, C. L. 1964. Review of herbicide penetration through plant surfaces. J. Agric. and Food Chem. 12:473–476.Google Scholar
9. Foy, C. L. and Smith, L. W. 1965. Surface tension lowering, wettability of paraffin and corn leaf surfaces, and herbicidal enhancement of dalapon by seven surfactants. Weeds 13:15–19.Google Scholar
10. Knight, W. E. 1955. The influence of photoperiod and temperature on growth, flowering, and seed production of dallisgrass, Paspalum dilatatum Pair. Agron. J. 47:555–559.Google Scholar
11. McWhorter, C. G. 1963. Effects of surfactant concentration on johnsongrass control with dalapon. Weeds 11:83–86.Google Scholar
12. McWhorter, C. G. 1963. Effects of surfactants on the herbicidal activity of foliar sprays of diuron. Weeds 11:265–269.CrossRefGoogle Scholar
13. McWhorter, C. G. 1977. Weed control in soybeans with glyphosate applied in the recirculating sprayer. Weed Sci. 25:135–141.Google Scholar
14. McWhorter, C. G. and Jordan, T. N. 1976. The effect of light and temperature on the growth and development of johnsongrass. Weed Sci. 24:88–91.CrossRefGoogle Scholar
15. McWhorter, C. G. and Jordan, T. N. 1976. Effects of adjuvants and environment on the toxicity of dalapon to johnsongrass. Weed Sci. 24:257–260.Google Scholar
16. Mitchell, K. J. 1953. Influence of light and temperature on the growth of ryegrass (Lolium spp.) I. Pattern of vegetative development. Physiol. Plant. 6:21–46.CrossRefGoogle Scholar
17. Nalewaja, J. D., Pudelko, J., and Addmczewski, K. A. 1975. Influence of climate and additives on bentazon. Weed Sci. 23:504–507.Google Scholar
18. Parochetti, J. V., Wilson, H. P., and Burt, G. W. 1975. Activity of glyphosate on johnsongrass. Weed Sci. 23:395–400.Google Scholar
19. Prasad, R., Foy, C. L., and Crafts, A. S. 1967. Effect of relative humidity on absorption and translocation of foliarly applied dalapon. Weeds 15:149–156.Google Scholar
20. Richardson, J. T. and Frans, R. E. 1977. Johnsongrass control in soybean after three years of herbicide application. Proc. South. Weed Sci. Soc. 30:73.Google Scholar
21. Robertson, M. M. and Kirkwood, R. C. 1970. The mode of action of foliage-applied translocated herbicides with particular reference to the phenoxy-acid compounds. II. The mechanism and factors influencing translocation, metabolism, and biochemical inhibition. Weed Res. 10:94–120.Google Scholar
22. Sheets, T. J. 1961. Uptake and distribution of simazine by oat and cotton seedlings. Weeds 9:1–3.Google Scholar
23. Smith, L. W., Foy, C. L., and Bayer, D. E. 1967. Herbicidal enhancement by certain new biodegradable surfactants. Weeds 15:87–89.Google Scholar
24. Szabo, S. S. and Buchholtz, K. P. 1961. Penetration of living and non-living surfaces by 2,4-D as influenced by ionic additives. Weeds 9:177–184.Google Scholar
25. Wills, G. D. 1975. Effect of light and temperature on growth of purple nutsedge. Weed Sci. 23:93–96.Google Scholar
26. Wills, G. D. 1976. Translocation of bentazon in soybeans and common cocklebur. Weed Sci. 24:536–540.Google Scholar