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Comparison of Aminocyclopyrachlor Absorption and Translocationin Leafy Spurge (Euphorbia esula) and Yellow Toadflax (Linaria vulgaris)

Published online by Cambridge University Press:  20 January 2017

Rodney G. Lym
Rodney G. Lym*
Affiliation:
Plant Sciences Department, North Dakota State University, Fargo, ND 58108
*
Corresponding author's E-mail: rod.lym@ndsu.edu
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Abstract

Aminocyclopyrachlor has provided excellent control of many perennial weedspecies including leafy spurge, but control of yellow toadflax has beeninconsistent. 14C-aminocyclopyrachlor absorption was rapid inboth leafy spurge and yellow toadflax and averaged 72% 48 h after treatment(HAT). However, translocation within the plant differed by species. More 14C translocated to the aboveground portion of yellow toadflax(28% of applied) compared to leafy spurge (16.5% of applied). There wasrapid translocation of 14C-label to the roots of both species butmore reached the belowground portion of leafy spurge than yellow toadflax.Over 12% of applied 14C translocated into leafy spurge rootswithin 24 HAT but declined to 2% by 192 HAT. In comparison, only 2% ofapplied 14C was found in yellow toadflax roots 24 HAT, and just0.15% remained in belowground plant parts by 192 HAT. The inconsistentlong-term control of yellow toadflax with aminocyclopyrachlor is likely dueto poor translocation to the root system, which would allow for rapidregrowth in this hard to control perennial species.

Keywords

Aminocyclopyrachlorleafy spurge, Euphorbia esula L. EPHES, yellow toadflax, Linaria vulgaris P. Mill. LINVU.14C-herbicideefficacyselectivity

Information

Type
Weed Management
Information
Weed Science , Volume 62 , Issue 2 , June 2014 , pp. 321 - 325
Copyright
Copyright © Weed Science Society of America 

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References

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