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Paraquat for Weed Control Prior to Establishing Legumes

Published online by Cambridge University Press:  12 June 2017

D. L. Linscott ,
A. A. Akhavein  and
R. D. Hagin
D. L. Linscott
Affiliation:
Agr. Res. Serv., U. S. Dep. of Agr. and the Department of Agronomy, Cornell University, Ithaca, N.Y.
A. A. Akhavein
Affiliation:
Agr. Res. Serv., U. S. Dep. of Agr. and the Department of Agronomy, Cornell University, Ithaca, N.Y.
R. D. Hagin
Affiliation:
Agr. Res. Serv., U. S. Dep. of Agr. and the Department of Agronomy, Cornell University, Ithaca, N.Y.
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Abstract

Land was prepared conventionally in early spring for the planting of small seeded legumes. Planting was delayed to allow emergence of weeds. We applied 1,1'-dimethyl-4,4'-bipyridinium salts (paraquat) and planted legumes immediately afterwards. Stage of weed growth, time of herbicide application, rate of chemical applied, and the methods of seeding were variables imposed. Paraquat (plus surfactant) applied at 1.1 and 2.2 kg/ha to emerged weeds prior to the seeding of legumes controlled quackgrass [Agropyron repens (L.) Beauv.] sufficiently to allow excellent establishment of alfalfa (Medicago sativa L.) and birdsfoot trefoil (Lotus corniculatus L.). A paraquat application delayed until yellow nutsedge (Cyperus esculentus L.) was at least 10 cm in height, followed by a disking, controlled the sedge sufficiently to allow legume establishment. For annual weed control, 0.3% kg/ha of paraquat was sufficient. Drilling as a method of seeding gave better legume stands than did surface-seeding techniques.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 4 , October 1969 , pp. 428 - 431
Copyright
Copyright © 1969 Weed Science Society of America 

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References

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