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Effects of Temperature on Absorption and Translocation of Profluralin and Dinitramine

Published online by Cambridge University Press:  12 June 2017

K. Hawxby  and
E. Basler
K. Hawxby
Affiliation:
School of Biol. Sci., Oklahoma State Univ., Stillwater, Oklahoma 74074
E. Basler
Affiliation:
School of Biol. Sci., Oklahoma State Univ., Stillwater, Oklahoma 74074
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Abstract

The absorption, translocation, and metabolism of 14C-profluralin [N-(cyclopropylmethyl)-α,α,α-trifluoro-2,6-dinitro-N-propyl-p-toluidine] and 14C-dinitramine (N4,N4-diethyl-α,α,α-trifluoro-3,5-dinitrotoluene-2,4-diamine) in sorghum [Sorghum bicolor (L.) Moench ‘RS6–12′], barnyardgrass [Echinochloa crus-galli (L.) Beauv.], soybean [Glycine max (L.) Merr. ‘Dare’], and Palmer amaranth (Amaranthus palmeri S. Wats.) were determined after treatment with 14C-labeled herbicides in nutrient solution for 24 hr at 16 or 38 C. 14C-profluralin accumulated in roots to a greater extent at 16 C, while metabolism was greatest at 38 C. Very little 14C-profluralin was translocated to the tops of plants. Conversely, 14C-dinitramine accumulated in the tops of plants to a greater extent at 38 C. Metabolism was not greatly affected by temperature. These effects may relate to excess toxicity of profluralin at 16 C and dinitramine at 38 C in species which normally exhibit resistance to the herbicides.

Type
Research Article
Information
Weed Science , Volume 24 , Issue 6 , November 1976 , pp. 545 - 548
Copyright
Copyright © 1977 by the Weed Science Society of America 

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References

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