Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-29T17:11:25.763Z Has data issue: false hasContentIssue false

Effect of Tillage Systems on the Efficacy and Phytotoxicity of Imazaquin and Imazethapyr in Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

J. Anthony Mills
Affiliation:
Dep. Agron., Univ. Kentucky, Lexington, KY 40546
William W. Witt
Affiliation:
Dep. Agron., Univ. Kentucky, Lexington, KY 40546

Abstract

Field experiments were conducted to evaluate the interactions of tillage systems with imazaquin and imazethapyr on weed control and soybean injury and yield. Control of jimsonweed, common cocklebur, ivyleaf morningglory, velvetleaf, and giant foxtail from imazaquin and imazethapyr in conventional tillage was generally equal to or greater than control in no-tillage. However, under limited rainfall, weed control in no-tillage was generally equal to or greater than control in conventional tillage. Reductions in soybean heights due to herbicide treatment were evident in both tillage systems in 1985 and 1986 but not in. Soybean yields were reduced in 1985 from imazaquin at 140, 210, and 250 g/ha and imazethapyr at 105 and 140 g/ha. Yields were not reduced in 1986 and. Imazaquin and imazethapyr appear to provide adequate control of jimsonweed, common cocklebur, ivyleaf morningglory, velvetleaf, and giant foxtail in conventional and no-till systems.

Type
Weed Control and Herbicide Technology
Copyright
Copyright © 1989 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Anonymous. 1986–87. Kentucky Agricultural Statistics. U.S. Dep. Agric. Google Scholar
2. Banks, P. A. and Robinson, E. L. 1982. The influence of straw mulch on the soil reception and persistence of metribuzin. Weed Sci. 30:164168.CrossRefGoogle Scholar
3. Banks, P. A. and Robinson, E. L. 1984. The fate of oryzalin applied to straw-mulched and nonmulched soils. Weed Sci. 32:269272.Google Scholar
4. Banks, P. A. and Robinson, E. L. 1986. Soil reception and activity of acetochlor, alachlor, and metolachlor as affected by wheat (Triticum aestivum) straw and irrigation. Weed Sci. 34:607611.CrossRefGoogle Scholar
5. Basham, G. W. and Lavy, T. V. 1987. Microbial and photolytic dissipation of imazaquin in soil. Weed Sci. 35:865870.CrossRefGoogle Scholar
6. Basham, G. W., Lavy, T. L., Oliver, L. R., and Scott, H. D. 1987. Imazaquin persistence and mobility in three Arkansas soils. Weed Sci. 35:576582.CrossRefGoogle Scholar
7. Bauman, T. T. and Ross, M. A. 1983. Effect of three tillage systems on the persistence of atrazine. Weed Sci. 31:423426.Google Scholar
8. Croon, K. A. and Slife, F. W. 1983. Evaluation of AC 252,214 for broad spectrum weed control in soybeans. Proc. North Cent. Weed Control Conf. 38:2930.Google Scholar
9. Crutchfield, D. A., Wicks, G. A., and Burnside, O. C. 1985. Effect of winter wheat (Triticum aestivum) straw mulch level on weed control. Weed Sci. 34:110114.CrossRefGoogle Scholar
10. Ghadiri, H., Shea, P. J., and Wicks, G. A. 1984. Interception and retention of atrazine by wheat (Triticum aestivum L.) stubble. Weed Sci. 32:2427.CrossRefGoogle Scholar
11. Goetz, A. J., Wehtje, G., Walker, R. H., and Hajek, B. 1986. Soil solution and mobility characterization of imazaquin. Weed Sci. 34:788793.CrossRefGoogle Scholar
12. Kapusta, G. 1979. Seedbed tillage and herbicide influence on soybean (Glycine max) weed control and yield. Weed Sci. 27:520526.CrossRefGoogle Scholar
13. Liebl, R. A. and Worsham, A. D. 1983. Tillage and mulch effects on morningglory (Ipomoea spp.) and certain other weed species. Proc. South. Weed Sci. Soc. 36:405414.Google Scholar
14. Newcomer, D. T. and Banks, P. A. 1986. Three new broadleaf herbicides in no-till soybeans. Proc. South. Weed Sci. Soc. 39:82.Google Scholar
15. U.S. Department of Agriculture. 1975. Minimum tillage: a preliminary technology assessment. Office of Planning and Evaluation, U.S. Dep. Agric., Washington, DC.Google Scholar
16. Webber, C. L., Kerr, H. D., and Gebhardt, M. R. 1987. Interrelations of tillage and weed control for soybean (Glycine max) production. Weed Sci. 35:830836.CrossRefGoogle Scholar