Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-27T06:49:46.942Z Has data issue: false hasContentIssue false
  • English
  • Français

Bentazon for Annual Weed Control in Newly Seeded Alfalfa (Medicago sativa L.)

Published online by Cambridge University Press:  12 June 2017

R. Gordon Harvey
R. Gordon Harvey*
Affiliation:
Dep. Agron., Univ. of Wisc., Madison, WI 53706
Get access Rights & Permissions [Opens in a new window]

Abstract

Preplant-incorporated (PPI) herbicides were applied to suppress annual weeds in new seedings of alfalfa, then additional annual weed control and crop tolerance from selected bentazon treatments were evaluated. Bentazon applied at 0.8 kg ai ha-1 without an adjuvant caused an average of 8% visual injury to newly seeded alfalfa but did not reduce first-harvest alfalfa yields. Bentazon improved common lambsquarters control in newly seeded alfalfa and reduced weed biomass in first-harvest forage. No significant difference in crop injury, weed control, alfalfa yield, or weed yield was observed when bentazon was applied at 0.6, 0.8, or 1.1 kg ha-1. Greater alfalfa injury occurred when bentazon was applied with 1.25% v/v oil-emulsifier mixture, than when applied alone or with 5% v/v 28% liquid nitrogen fertilizer (28% N). Ten alfalfa cultivars did not differ in sensitivity to bentazon applied early postemergence (POST) or POST.

Keywords

Bentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzotMadiazin-4(3H)-one 2,2-dioxidealfalfa, Medicago sativa L.common lambsquarters, Chenopodium album L. ♯ CHEALForagecrop injuryChenopodium album CHEAL
Type
Research
Information
Weed Technology , Volume 5 , Issue 1 , March 1991 , pp. 154 - 158
Copyright
Copyright © 1990 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. Anderson, R. N., Lueschen, W. E., Warnes, D. D., and Nelson, W. W. 1974. Controlling broadleaf weeds in soybeans with bentazon in Minnesota. Weed Sci. 22:136–142.Google Scholar
2. Dawson, J. H., and Harvey, R. G. 1981. Management systems for weeds in alfaifa. p. 303–315 in Pimentel, D., ed., Handbook of Pest Management in Agriculture, Vol. III. CRC Press Inc., Boca Raton, FL.Google Scholar
3. Fischer, A. J., Dawson, J. H., and Appleby, A. P. 1988. Interference of annual weeds in seedling alfalfa (Medicago sativa). Weed Sci. 36: 583–588.CrossRefGoogle Scholar
4. Kust, C. A. 1968. Herbicides or oat companion crops for alfalfa establishment and forage yields. Agron. J. 60:151–154.Google Scholar
5. Nalewaja, J. D., and Adamczewski, K. A. 1977. Uptake and translocation of bentazon with additives. Weed Sci. 25:309–315.Google Scholar
6. Nielsen, R. L., Stuthman, D. D., and Barnes, D. K. 1981. Interference between oats and alfalfa in mixed seedings. Agron. J. 73:635–638.Google Scholar
7. Peregrine, E. K., and Norris, R. F. 1988. Environmental modification of seedling alfalfa (Medicago sativa) tolerance to bromoxynil. Weed Sci. 36:671–677.Google Scholar
8. Schmid, A. R., and Behrens, R. 1972. Herbicide versus oat companion crop for alfalfa establishment. Agron. J. 64:157–159.Google Scholar
9. Temme, D. G., Harvey, R. G., Fawcett, R. S., and Young, A. W. 1979. The effects of annual weed control on alfalfa forage quality. Agron. J. 71:51–54.Google Scholar
10. Wilson, R. G. 1986. Weed control in irrigated seedling alfalfa (Medicago sativa). Weed Sci. 34:423–426.Google Scholar