Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-27T07:24:18.439Z Has data issue: false hasContentIssue false
  • English
  • Français

Established Forage Alfalfa (Medicago sativa) Tolerates Glyphosate and SC-0224 Applied to Control Dodder (Cuscuta spp.)

Published online by Cambridge University Press:  12 June 2017

Jean H. Dawson
Jean H. Dawson*
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Irrigated Agric. Res. and Ext. Cent., Prosser, WA 99350
Get access Rights & Permissions [Opens in a new window]

Abstract

Established alfalfa treated with glyphosate at 75 or 150 g ae/ha (rates known to control dodder) during the vegetative or bud stage showed symptoms of narrowed leaves and mildly chlorotic new growth, and yield of one cutting of alfalfa usually was reduced by 10 to 20%. Glyphosate, applied in the vegetative stage, affected the treated foliage more than postharvest regrowth. Applied at bud stage, the regrowth that followed harvest of treated foliage was affected more. Symptoms and effect on yield were greater at 300 g ae/ha, but alfalfa always recovered. Applying glyphosate at 75 or 150 g ae/ha in each of two or three sequential cuttings showed no cumulative effect. Glyphosate and SC-0224 had similar effects on alfalfa and suppressed alfalfa much less than would a severe infestation of dodder.

Keywords

Glyphosate, N-(phosphonomethyl)glycineSC-0224, trimethylsulfonium carboxymethylaminomethylphosphonatealfalfa, Medicago sativa L.dodder, Cuscuta spp.Herbicidecrop suppressionselective controlparasitic weedsulfosate
Type
Research
Information
Weed Technology , Volume 3 , Issue 4 , December 1989 , pp. 560 - 565
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. Carlson, K. L., and Burnside, O. C. 1984. Comparative phytotoxicity of glyphosate, SC-0224, SC-0545, and HOE-00661. Weed Sci. 32:841–844.Google Scholar
2. Dawson, J. H. 1989. Dodder (Cuscuta spp.) control in established alfalfa (Medicago sativa) with glyphosate and SC-0224. Weed Technol. 3:552–559.Google Scholar
3. Dawson, J. H. 1966. Response of dodder to shade. Weed Sci. 14:4–5.Google Scholar
4. Dawson, J. H., and Saghir, A. R. 1983. Herbicides applied to dodder (Cuscuta spp.) after attachment to alfalfa (Medicago sativa). Weed Sci. 31:465–471.CrossRefGoogle Scholar
5. Fer, A. 1984. Physiological approach to the chemical control of Cuscuta: experiments with 14C-labelled herbicides. Proc. Third Int. Symp. Parasitic Weeds, Aleppo. p. 164–174.Google Scholar
6. Kivlin, P. T., and Doll, J. D. 1988. Quackgrass (Agropyron repens) control with SC-0224 and glyphosate Weed Technol. 2:147–152.Google Scholar
7. Wilson, H. P., Hines, T. E., Bellinder, R. R., and Grande, J. A. 1985. Comparison of HOE-39866, SC-0224, paraquat, and glyphosate in no-till corn (Zeamays). Weed Sci. 33:531–536.Google Scholar