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Uptake, Movement, and Metabolism of Cyanazine in Fall Panicum, Green Foxtail, and Corn

Published online by Cambridge University Press:  12 June 2017

A. D. Kern ,
W. F. Meggitt  and
Donald Penner
A. D. Kern
Affiliation:
Dep. of Crop and Soil Sci. Michigan State Univ., E. Lansing, MI 48824
W. F. Meggitt
Affiliation:
Dep. of Crop and Soil Sci. Michigan State Univ., E. Lansing, MI 48824
Donald Penner
Affiliation:
Dep. of Crop and Soil Sci. Michigan State Univ., E. Lansing, MI 48824
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Abstract

In greenhouse studies root absorption after postemergence applications of cyanazine 2-[[4-chloro-6-(ethylamino)-s-triazine-2-yl] amino]-2-methylpropionitrile enhanced phytotoxicity to fall panicum (Panicum dichotomiflorum Michx.), green foxtail (Setaria viridis L.), and corn (Zea mays L.). Less 14C-cyanazine was taken up by the foliage of corn than by the weed species. A lower concentration of parent cyanazine in corn leaves was also evident. The addition of a phytobland oil to the treatment solution increased foliar cyanazine absorption 1 and 5 days following treatment. Although rapid metabolism occurred in corn roots, the large amount of cyanazine absorbed via the root system resulted in internal concentrations of parent cyanazine similar to that observed in the weed species. Cyanazine translocation was mainly acropetal from the point of application. The basis of selectivity is not solely based on the differential foliar uptake of cyanazine, but also on the proportion taken up by the foliage and roots. Under conditions favoring uptake by roots, the margin of selectivity may be reduced.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 4 , July 1975 , pp. 277 - 282
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

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