Skip to main content Accessibility help
×
Home

Effect of Rainfall on Glyphosate Plus 2,4-D Performance on Echinochloa crus-galli

  • Gail A. Wicks (a1) and Gordon E. Hanson (a1)

Abstract

Barnyardgrass is a problem in winter wheat fields in the central Great Plains following harvest. Glyphosate plus 2,4-D efficacy on barnyardgrass with or without atrazine was investigated under various watering events at three sites in west central Nebraska. Two experiments were initiated at each site. One experiment dealt with rainfall and the other rainfall plus irrigation. Main plots in stubble fields infested with barnyardgrass were sprayed with glyphosate plus 2,4-D at 0.4 plus 0.7, 0.5 plus 0.8, and 0.6 plus 1.0 kg ae ha−1 alone and with 2.2 kg ai ha−1 atrazine. Barnyardgrass was under drought stress in unwatered areas in 1991 at two sites, but the 1993 site was waterlogged. Glyphosate plus 2,4-D at 0.6 plus 1.0 kg ha1 controlled 62, 99, and 100% of the barnyardgrass at the three sites 30 DAT. Nevertheless, control was reduced to 48, 88, and 35% when atrazine was combined with glyphosate plus 2,4-D. Poorest control came when plants were under stress from drought or waterlogging and atrazine was included in the spray solution. In subplots barnyardgrass plants in a 0.8 m2 area were watered 6, 3, or 1 d before spraying and 1, 4, 7, or 11 d after spraying. By watering drought-stressed barnyardgrass 6 d before spraying, control generally was similar or better than with later watering dates. Watering 6 d before spraying with glyphosate plus 2,4-D plus atrazine at 0.6 plus 1.0 plus 2.2 kg ha−1 reduced but did not eliminate antagonism from atrazine.

Copyright

References

Hide All
1. Ahmadi, M. S., Haderlie, L. C., and Wicks, G. A. 1980. Effect of growth stage and water stress on barnyardgrass (Echinochoa crus-galli) control and on glyphosate absorption and translocation. Weed Sci. 28:277282.
2. Appleby, A. P. and Somabhi, M. 1978. Antagonistic effect of atrazine and simazine on glyphosate activity. Weed Sci. 26:135139.
3. Caseley, J. C. and Coupland, D. 1985. Environmental and plant factors affecting glyphosate uptake, management, and activity. Pages 92123 in Grossbard, E. and Atkinson, D., eds. The Herbicide Glyphosate. Butterworths Co., London.
4. Flint, J. L., Barrett, M., and Olson, G. L. 1987. Effect of 2,4-D or dicamba on glyphosate activity in johnsongrass. Proc. South. Weed Sci. Soc. 40:333.
5. Fraser, G. S. 1985. Fusilade 212: Factors affecting biological activity. Pages 99103 in Martin, R. J. and Felton, W. L., eds. No-tillage crop production in northern N.S.W. Proc. of the project team meeting, Tamworth, NSW, April 17 and 18.
6. Selleck, G. W. and Baird, D. D. 1981. Antagonism with glyphosate and residual herbicide combinations. Weed Sci. 29:185190.
7. Wicks, G. A., Popken, D. H., and Lowry, S. R. 1988. Survey of winter wheat (Triticum aestivum) stubble fields sprayed with herbicides after harvest in 1986. Weed Technol. 3:244254.
8. Wicks, G. A., Felton, W. L., and Welsby, S. M. 1993. Effect of rainfall on glyphosate performance on stressed grass weeds following wheat harvest. Plant Prot. Q. 8:26.
9. Wicks, G. A., Popken, D. H., and Mahnken, G. W. 1992. Survey of winter wheat fields that were sprayed after wheat harvest in 1991. Univ. of Nebraska Ext. Serv. Proc. of the Ecofarming and Winter Wheat Conferences 15:4146.
10. Wilson, H. P., Hines, T. E., Bellinder, R. R., and Grande, J. A. 1985. Comparisons of HOE-39866, SC-0224, paraquat, and glyphosate in no-till corn (Zea mays). Weed Sci. 33:531536.

Keywords

Effect of Rainfall on Glyphosate Plus 2,4-D Performance on Echinochloa crus-galli

  • Gail A. Wicks (a1) and Gordon E. Hanson (a1)

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