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Herbicidal Control of Common Milkweed (Asclepias syriaca)

Published online by Cambridge University Press:  12 June 2017

Prasanta C. Bhowmik
Prasanta C. Bhowmik*
Affiliation:
Dep. Plant and Soil Sci., Univ. of Massachusetts, Amherst, MA 01003
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Abstract

Five field experiments were conducted to evaluate effectiveness of postemergence herbicidal treatments. Amitrole (3-amino-s-triazole) at 1.1 kg ai/ha and picloram (4-amino-3,5,6-trichloropicolinic acid) at 0.6 kg ai/ha reduced stands of common milkweed (Asclepias syriaca L.) for a 4-yr period. Glyphosate [N-(phosphonomethyl)glycine] at 2.2 kg ai/ha reduced stands of milkweed for two to three growing seasons. Glyphosate or amitrole applied in June (early bud stage) more effectively reduced milkweed stands in the second year than did the herbicides when applied in August (post-flowering stage). Treatments of 2,4-D [(2,4-dichlorophenoxy)acetic acid], 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid], and dicamba (3,6-dichloro-o-anisic acid) did not reduce stands of common milkweed.

Keywords

Long-term controlglyphosateamitrolepicloram
Type
Research Article
Information
Weed Science , Volume 30 , Issue 4 , July 1982 , pp. 349 - 351
Copyright
Copyright © 1982 by the Weed Science Society of America 

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References

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