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Herbicidal Activity and Metabolism of Dyrene in Canada Thistle

Published online by Cambridge University Press:  12 June 2017

P. B. Marriage
P. B. Marriage*
Affiliation:
Res. Sta., Agriculture Canada, Harrow, Ont., Canada. NOR 1GO
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Abstract

The fungicide, Dyrene [2,4-dichloro-6-(o-chloroanilino)-s-triazine], severely injured var. mite of Canada thistle [Cirsium arvense (L.) Scop.]; and the damage resembled that caused by bipyridylium herbicides. Regrowth from treated plants was abnormal. Other arylamino-s-triazines were from slightly to severely phytotoxic to leaf sections of the var. mite. The var. horridum of Canada thistle was not affected by Dyrene or related compounds. Dyrene and metabolites of Dyrene which were phytotoxic to var. mite leaf disks in bioassay tests were isolated from treated var. mite and horridum plants, but none of these compounds injured the var. horridum. One metabolite was found only in the var. mite; the other five occurred in both varieties. The metabolites were apparently formed from Dyrene by conjugation reactions.

Type
Research Article
Information
Weed Science , Volume 21 , Issue 5 , September 1973 , pp. 389 - 392
Copyright
Copyright © 1973 Weed Science Society of America 

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References

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