Skip to main content Accessibility help
×
Home

Phytotoxic Effects of Glyphosate on Pepper (Capsicum annuum)

  • James P. Gilreath (a1), Carlene A. Chase (a2) and Salvadore J. Locascio (a2)

Abstract

Glyphosate was applied to pepper as single or sequential applications to assess the consequences of drift or other accidental exposures. Foliar injury increased and plant vigor declined with increased rates of glyphosate and were exacerbated by a second application. Single applications at flowering (stage 1) were more damaging than single applications after fruit set (stage 2). Decline in marketable yield with increased glyphosate rate was greater with stage 1 applications, except in spring 1987 when marketable yields with single applications of glyphosate at stage 1 or stage 2 were statistically similar. Sequential applications resulted in the lowest marketable yields. Total yields declined with increased glyphosate rate and decline was more pronounced with sequential applications than with single applications. Total yield was affected to a greater extent when glyphosate was applied at stage 1 than at stage 2. Yield was more sensitive to two successive exposures than to single applications. Mean fruit weight was reduced by glyphosate in two of the four experiments.

Copyright

Corresponding author

Corresponding author's E-mail: drgilreath@aol.com.

References

Hide All
Cornish, P. S. 1992. Glyphosate residues in a sandy soil affect tomato transplants. Aust. J. Exp. Agric. 32: 395399.
Eberbach, P. L. and Douglas, L. A. 1983. Persistence of glyphosate in a sandy loam. Soil Biol. Biochem. 15: 485487.
Lutman, P.J.W. and Richardson, W. G. 1978. The activity of glyphosate and aminotriazole against volunteer potato plants and their daughter tubers. Weed Res. 18: 6570.
Masiunas, J. B. and Weller, S. C. 1988. Glyphosate activity in potato (Solanum tuberosum) under different temperature regimes. Weed Sci. 36: 137140.
Powles, S. B., Lorraine-Colwill, D. F., Dellow, J. J., and Preston, C. 1998. Evolved resistance to glyphosate in rigid ryegrass (Lolium rigidum) in Australia. Weed Sci. 46: 604607.
Romanowski, R. R. 1980. Simulated drift studies with herbicides on field-grown tomato. HortScience 15: 793794.
Russo, V. M. 1990. Reaction of tomato cultivars to a sublethal dose of glyphosate. HortScience 25:1662.
[SAS] Statistical Analysis Systems. 1988. SAS/STAT User's Guide. Release 6.03 Edition. Cary, NC: Statistical Analysis Systems Institute, Inc. 1,028 p.
Semidey, N. and Almodóver, L. 1987. Glyphosate on tomato and sweet pepper yields. J. Agric. Univ. P. R. 71: 235237.
Smid, D. and Hiller, L. K. 1981. Phytotoxicity and translocation of glyphosate in the potato (Solanum tuberosum) prior to tuber initiation. Weed Sci. 29: 218223.
Snedecor, G. W. and Cochran, W. G. 1980. Statistical Methods. Ames, IA: The Iowa State University Press, pp. 274297.
Wallace, A., Lancaster, R. A., and Hill, N. L. 1998. Application of non-selective herbicides during flowering of pasture legumes can reduce seed yield and alter seed characteristics. Aust. J. Exp. Agric. 38: 583594.

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed