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Uptake, Translocation, and Metabolism of Quinclorac in Two Grass Species

Published online by Cambridge University Press:  12 June 2017

William J. Chism ,
S. Wayne Bingham  and
Richard L. Shaver
William J. Chism
Affiliation:
Dep. Plant Pathol., Physiol., Weed Sci., Va. Polytech Inst. State Univ., Blacksburg, VA 24061-0331
S. Wayne Bingham
Affiliation:
Dep. Plant Pathol., Physiol., Weed Sci., Va. Polytech Inst. State Univ., Blacksburg, VA 24061-0331
Richard L. Shaver
Affiliation:
Dep. Plant Pathol., Physiol., Weed Sci., Va. Polytech Inst. State Univ., Blacksburg, VA 24061-0331
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Abstract

Research was conducted to determine the role of uptake, distribution, and metabolism of quinclorac in differential sensitivity of southern crabgrass and Kentucky bluegrass. At 0.5 h, quinclorac uptake was 85% in southern crabgrass and 66% in bluegrass. Uptake and distribution differed between species. By 128 h, Kentucky bluegrass had uniformly distributed quinclorac and exuded 17% into the nutrient solution. Metabolism of quinclorac was limited to less than 3.6% of the applied 14C in the two species, at 128 h. Selectivity of quinclorac may be influenced by differences in uptake, distribution, and exudation by the roots but not by metabolism.

Keywords

Quinclorac, 3,7-dichloro-8-quinolinecarboxylic acid, (also known as BAS 514 H) southern crabgrass, Digitaria ciliaris (Retz.) Koel ♯ DIGSPKentucky bluegrass, Poa pratensis L. ♯ POAPR, ‘Plush’BAS 090 02S Sherbicide physiologyprofile analysis
Type
Research
Information
Weed Technology , Volume 5 , Issue 4 , December 1991 , pp. 771 - 775
Copyright
Copyright © 1990 by the Weed Science Society of America 

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