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Effect of MCPA on 14C-Diclofop Uptake and Translocation

Published online by Cambridge University Press:  12 June 2017

Wayne Olson  and
J. D. Nalewaja
J. D. Nalewaja
Affiliation:
Dep. Agron., North Dakota State Univ., Fargo, ND 58105
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Abstract

Experiments were conducted to determine the influence of the dimethylamine salt of MCPA {[(4-chloro-o-tolyl)oxy] acetic acid} pretreatment, darkness from 1 day prior to treatment until harvest, and exogenous sucrose on diclofop {2-[4-(2,4-dichlorophenoxy)phenoxyl] propanoic acid} glucose, and sucrose uptake and translocation by wild oat (Avena fatua L.). Uptake of 14C-diclofop label by wild oat foliage was not influenced by MCPA pretreatment, constant dark treatment, or the addition of exogenous sucrose. Total 14C-diclofop and 14C-glucose label uptake and translocation were similar whether 5 cm of the treated leaf tip were placed in distilled water or 1% (w/v) sucrose. Downward translocation of 14C-diclofop, 14C-sucrose, and 14C-glucose label in the phloem of wild oat was reduced similarly by MCPA, constant dark treatments, or a combination of the two. Upward translocation of 14C-diclofop label was greater and exudation of 14C-diclofop label into the ‘tip’ solution was less than that of 14C-sucrose or 14C-glucose label, regardless of MCPA or constant dark treatments. Downward translocation of 14C-diclofop label was reduced as much by MCPA topically applied to the wild oat leaf 1 cm above, 1 cm below, or with the diclofop as with the MCPA broadcast pretreatment.

Keywords

Antagonismherbicide interactions
Type
Research Article
Information
Weed Science , Volume 30 , Issue 1 , January 1982 , pp. 59 - 63
Copyright
Copyright © 1982 by the Weed Science Society of America 

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References

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