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Weed Control in Wheatgrass Seedbeds with Siduron and Picloram

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

Preemergence applications of 3 lb/A of 1-(2-methylcyclohexyl)-3-phenylurea (siduron) plus 0.3 lb/A of 4-amino-3,5,6-trichloropicolinic acid (picloram) sufficiently suppressed competition from downy brome (Bromus tectorum L.) or medusahead (Taeniatherum asperum (Sim.) Nevski) and associated broadleaf species to allow the marginal establishment of intermediate wheatgrass (Agropyron intermedium (Host.) Beauv., var. Amur) seedlings. The technique was only successful on semi-arid range sites with above-average soil moisture and moderately dense stands of weed grasses. The range in tolerance of the three species to siduron is very similar, but downy brome is slightly more susceptible than medusahead or intermediate wheatgrass. There is a significant negative relation between plant moisture stress and root length of intermediate wheatgrass plants when root elongation is suppressed by low rates of siduron.

Type
Research Article
Information
Weed Science , Volume 18 , Issue 5 , September 1970 , pp. 546 - 549
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

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