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Effect of Silvex and 2,4,5-T on Alkaloid Content of Tall Larkspur

Published online by Cambridge University Press:  12 June 2017

M. Coburn Williams  and
Eugene H. Cronin
M. Coburn Williams
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, in cooperation with the Utah Agricultural Experiment Station, Logan
Eugene H. Cronin
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, in cooperation with the Utah Agricultural Experiment Station, Logan
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Abstract

Amine salts of 2,4,5-trichlorophenoxy-propionic acid (silvex) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) were applied to tall larkspur, Delphinium barbeyi Huth, at 2, 4, and 8 lb/A on three dates. Leaf and stem samples collected 1, 2, and 3 weeks after treatment yielded significantly higher concentrations of alkaloids than did controls. Leaves and stems from plants treated with silvex contained more alkaloids than did those treated with 2,4,5-T. Alkaloid concentration in the leaves varied directly with the rate of herbicide following the first treatment in mid-July, but this relation was not apparent in samples obtained from the third treatment in August.

Type
Research Article
Information
Weeds , Volume 11 , Issue 4 , October 1963 , pp. 317 - 319
Copyright
Copyright © 1963 Weed Science Society of America 

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References

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