Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-28T00:49:03.643Z Has data issue: false hasContentIssue false
  • English
  • Français

Weed Control in Alfalfa (Medicago sativa) Grown for Seed

Published online by Cambridge University Press:  12 June 2017

John Waddington
John Waddington*
Affiliation:
Agric. Can. Res. Stn., Melfort, Saskatchewan, Canada S0E 1A0
Get access Rights & Permissions [Opens in a new window]

Abstract

Applications of 1.6 kg ai/ha of metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one] to established alfalfa (Medicago sativa L. ‘Rambler’) at the start of each growing season for 4 yr increased seed yield by 68% and controlled established dandelion (Taraxacum officinale Weber. in Wiggers ♯ TAROF) and smooth brome (Bromus inermis Leyss. ♯ BROIN). A lesser amount of metribuzin was not sufficient for smooth brome control, and a greater amount damaged the alfalfa. Hexazinone [3-cyclohexyl-6-(dimethylamino)-methyl-1,3,5-triazine-2,4(1H,3H)-dione] applied at 1.0 kg ai/ha also controlled dandelion and smooth brome and produced increases in alfalfa seed yield. Mixtures of terbacil (3-tert-butyl-5-chloro-6-methyluracil) with reduced rates of metribuzin or hexazinone controlled dandelion well, but gave only fair control of smooth brome. Alfalfa seed yield was negatively correlated with the smooth brome population.

Keywords

Seed yieldhexazinonemetribuzinterbacilBROINTAROF
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 33 , Issue 3 , May 1985 , pp. 411 - 414
Copyright
Copyright © 1985 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. Kapusta, G. and Strieker, C. F. 1975. Selective control of downy brome in alfalfa. Weed Sci. 23:202–206.Google Scholar
2. Robison, L. R., Williams, C. F., and Laws, W. D. 1978. Weed control in established alfalfa (Medicago sativa). Weed Sci. 26:37–40.Google Scholar
3. Rowell, J. G. and Walters, D. E. 1976. Analyzing data with repeated observations on each experimental unit. J. Agric. Sci., Camb. 87:432–432.CrossRefGoogle Scholar
4. Sheaffer, C. C. and Wyse, D. L. 1972. Common dandelion (Taraxacum officinale) control in alfalfa (Medicago sativa). Weed Sci. 30:216–220.Google Scholar
5. Waddington, J. 1980. Chemical control of dandelion (Taraxacum officinale) and perennial sowthistle (Sonchus arvensis) in alfalfa (Medicago sativa) grown for seed. Weed Sci. 28:164–167.Google Scholar
6. Wilson, R. G. Jr. 1981. Weed control in established dryland alfalfa (Medicago sativa). Weed Sci. 29:615–618.Google Scholar