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Dodder (Cuscuta spp.) Control in Newly Seeded Alfalfa (Medicago sativa) with Glyphosate

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
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Abstract

A heavy, uncontrolled infestation of field dodder and largeseed dodder suppressed newly seeded alfalfa severely and killed many of the plants. Glyphosate at 75 or 150 g ae ha-1, sprayed over the top of the dodder-infested alfalfa, stopped the growth of dodder and did not injure alfalfa significantly. Treated dodder began to grow normally again 2 to 3 wk after treatment. This regrowth injured the alfalfa severely in spite of earlier control. Glyphosate at 75 or 150 g ha-1 applied two or three times controlled dodder effectively and protected the alfalfa. A rate of 40 g ha-1 was not effective.

Keywords

Glyphosate, N-(phosphonomethyl)glycinealfalfa, Medicago sativa L.field dodder, Cuscuta campestris, Yuncker ♯3 CVCCAlargeseed dodder, Cuscuta indecora, Choisy ♯ CVCINHerbicideparasitic weedpost-attachment control
Type
Research
Information
Weed Technology , Volume 4 , Issue 4 , December 1990 , pp. 880 - 885
Copyright
Copyright © 1990 Weed Science Society of America 

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References

Literature Cited

1. Dawson, J. H. 1966. Response of dodder to shade. Weed Sci. 14:4–5.Google Scholar
2. Dawson, J. H. 1971. Establishing alfalfa on dodder-infested soil. Weed Sci. 19:222–225.CrossRefGoogle Scholar
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5. Dawson, J. H. 1991. Newly seeded alfalfa (Medicago sativa) tolerates glyphosate and SC-0224 at doses that control dodder (Cuscuta spp.). Weed Technol. 4:876–879.Google Scholar
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