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Common Dandelion (Taraxacum officinale) Control with 2,4-D and Mechanical Treatments

Published online by Cambridge University Press:  12 June 2017

Henrietta Mann
Henrietta Mann*
Affiliation:
Dep. Plant Sci., Univ. of Western Ontario, London, Ontario N6A 5B7, Canada
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Abstract

The application of 2,4-D [(2,4-dichlorophenoxy) acetic acid], at 1.1 kg/ha to common dandelion (Taraxacum officinale Weber) resulted in 40% or less survival in lawn and hayfield habitats, in both spring and fall treatments. A significantly lower incidence of regeneration (12 to 20%) was attained independent of the season by shoot removal (spudding) combined with 2,4-D in the lawn, but not in the hayfield habitat. No measure of control was obtained by spudding alone, confirming the high capacity of common dandelion for root regeneration. Removal of leaves 2 weeks after application of 2,4-D diminished the effectiveness of control in both lawn and hayfield habitats, with 49 to 50% and 60 to 70% regeneration, respectively. Apparently, there is incomplete translocation of the herbicide within this interval. Significant mortality from spudding alone was observed only in plants less than 4 months old (64% survival). One-year-old plants responded to all treatments in the same manner as common dandelion populations as a whole. Optimum control of common dandelion in lawns was obtained by 2,4-D application in combination with spudding, during the spring.

Keywords

Forage weedslawn weedsroot regenerationturf weedsphenoxy herbicides
Type
Research Article
Information
Weed Science , Volume 29 , Issue 6 , November 1981 , pp. 704 - 708
Copyright
Copyright © 1981 by the Weed Science Society of America 

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References

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