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Control and Ecological Studies of Scotch Thistle

Published online by Cambridge University Press:  12 June 2017

James A. Young  and
Raymond A. Evans
James A. Young
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr., Reno, Nevada
Raymond A. Evans
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr., Reno, Nevada
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Abstract

The range weed, Scotch thistle (Onopordum acanthium L.), is an increasing problem in the western United States. It competes with desirable forage plants and the flower stalks are a barrier to livestock movement. Prolific production of viable but dormant achenes makes this species a persistent pest. Applications of 4-amino-3,5,6-trichloropicolinic acid (picloram) in the spring or fall, at rates as low as 0.03 lb/A, gave control of Scotch thistle.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 1 , January 1969 , pp. 60 - 63
Copyright
Copyright © 1969 Weed Science Society of America 

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References

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