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Herbicide Tolerance in Relation to Growth and Stress in Conifers

Published online by Cambridge University Press:  12 June 2017

Sandra P. King  and
Steven R. Radosevich
Sandra P. King
Affiliation:
Univ. of California, Davis, CA
Steven R. Radosevich
Affiliation:
Univ. of California, Davis, CA
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Abstract

Herbicide injury to five coniferous species was determined for the butoxyethanol ester of 2,4-D [(2,4-dichlorophenoxy)acetic acid], the isopropylamine salt of glyphosate [N-(phosphonomethyl)glycine], and the triethylamine salt of triclopyr {[(3,5,6-trichloro-2-pyridinyl) oxy] acetic acid} throughout the growing season of 1981. The relationship of herbicide tolerance to growth rate, water stress, and photosynthesis was determined for Jeffrey pine (Pinus jeffreyii Grev. & Balif), sugar pine (P. lambertiana Dougl.), red fir (Abies magnifica A. Murr.), white fir [A. concolor (Gord. & Glend) Lindl.], and Douglas fir [Pseudotsuga menziesii (Mirb.) Franco]. Although most of the species showed a high correlation of injury to leader or needle growth rate and xylem pressure potential, the seasonal trend in the degree of injury and the relationship of herbicide tolerance to various physiological factors were unique for each species. Criteria for determining herbicide application periods depended on species and herbicide.

Keywords

Glyphosatetriclopyr2,4-DAbies concolorAbies magnificaPinus jeffreyiiP. lambertianaPseudotsuga menziesii
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 33 , Issue 4 , July 1985 , pp. 472 - 478
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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