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Metabolism of Siduron by Barley and Crabgrass

Published online by Cambridge University Press:  12 June 2017

Walter E. Splittstoesser  and
Herbert J. Hopen
Walter E. Splittstoesser
Affiliation:
Department of Horticulture, University of Illinois, Urbana
Herbert J. Hopen
Affiliation:
Department of Horticulture, University of Illinois, Urbana
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Abstract

At rates as high as 40 lb/A, 1-(2-methylcyclohexyl)-3-phenylurea (siduron) did not reduce the growth of crabgrass (Digitaria spp.) seedlings although it was highly toxic to germinating seeds. Siduron placed at the 2-inch soil depth reduced root growth but not shoot growth of crabgrass. Barley (Hordeum vulgare L., var. Trail) roots, like crabgrass, were more affected than shoots. Carbonyl labeled siduron-14C was absorbed by both barley roots and shoots. Siduron-14C was translocated from roots to shoots but not from shoots to roots. Analysis of the extracts from plants treated at various times revealed that no metabolites of siduron-14C were present. Siduron must be present at the time of seed germination to effectively reduce plant growth.

Type
Research Article
Information
Weed Science , Volume 16 , Issue 3 , July 1968 , pp. 305 - 308
Copyright
Copyright © Weed Science Society of America 

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References

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