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Effect of Temperature and Photoperiod on Triclopyr, Picloram, and 2,4,5-T Translocation

Published online by Cambridge University Press:  12 June 2017

S. R. Radosevich  and
D. E. Bayer
S. R. Radosevich
Affiliation:
Dep. Bot., Univ. of California, Davis, CA 95616
D. E. Bayer
Affiliation:
Dep. Bot., Univ. of California, Davis, CA 95616
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Abstract

The effects of photoperiod and temperature on the translocation of triclopyr {[1(3,5,6-trichloro-2-pyridinyl)oxy] acetic acid}, picloram (4-amino-3,5,6-trichloropicolinic acid) and 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid] were studied on tanoak [Lithocarpus densiflorus (Hook. & Arn.) Rehd.], snowbush ceanothus (Ceanothus velutinus Dougl.), bigleaf maple (Acer macrophyllum Pursh), bean (Phaseolus vulgaris L. var. ‘Red Kidney’) and barley (Hordeum vulgare L. var. CM-67). Isolation of 14C and analysis for the radioactive herbicides revealed little metabolism of the herbicides. Regardless of herbicide or plant species herbicide movement was greatest under warm temperature and long day conditions. Among the herbicides tested, 14C associated with triclopyr was the most mobile in each species. Each herbicide moved readily in the symplast but root applications of each herbicide revealed limited apoplastic mobility.

Keywords

Metabolismautoradiographywoody plantsPhaseolus vulgarisHordeum vulgare
Type
Research Article
Information
Weed Science , Volume 27 , Issue 1 , January 1979 , pp. 22 - 27
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

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