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Dodder (Cuscuta spp.) Control in Established Alfalfa (Medicago sativa) with Glyphosate and SC-0224

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

Glyphosate and SC-0224 at 75 or 150 g ae/ha, applied to alfalfa foliage after field dodder and largeseed dodder were parasitically well established, controlled dodder selectively. Glyphosate applied at any time over a range of developmental stages stopped the growth of dodder. Control was best when the herbicides were applied when alfalfa was 20 to 30 cm tall, when maximum length of dodder shoots was 30 to 60 cm, and while host and parasite were both vegetative and growing vigorously. Later application allowed dodder to injure alfalfa before being controlled, and earlier application sometimes allowed dodder to recover and suppress alfalfa before the hay was cut.

Keywords

Glyphosate, N-(phosphonomethyl)glycineSC-0224, trimethylsulfonium carboxymethylaminomethylphosphonatealfalfa, Medicago sativa L.field dodder, Cuscuta campestris Yuncker ♯3 CVCCAlargeseed dodder, Cuscuta indecora Choisy ♯ CVCINHerbicideparasitic weedspost-attachment control
Type
Research
Information
Weed Technology , Volume 3 , Issue 4 , December 1989 , pp. 552 - 559
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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