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Eurasian Watermilfoil in the Tennessee Valley

Published online by Cambridge University Press:  12 June 2017

Gordon E. Smith ,
T. F. Hall Jr.  and
R. A. Stanley
Gordon E. Smith
Affiliation:
Reservoir Ecology Branch, Division of Health and Safety, Tennessee Valley Authority, Muscle Shoals, Alabama
T. F. Hall Jr.
Affiliation:
Reservoir Ecology Branch, Division of Health and Safety, Tennessee Valley Authority, Muscle Shoals, Alabama
R. A. Stanley
Affiliation:
Reservoir Ecology Branch, Division of Health and Safety, Tennessee Valley Authority, Muscle Shoals, Alabama
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Abstract

Eurasian watermilfoil (Myriophyllum spicatum L.), a submersed aquatic weed, has seriously interfered with many water uses in the TVA reservoirs. More than 150 test plots were treated with 34 herbicides from 1960 through 1965. More effective results were obtained with granular preparations of butoxyethanol ester, 2-ethyl hexanol ester, and propylene glycol butyl ether ester of 2,4-dichlorophenoxyacetic acid (2,4-D) and liquid preparations of propylene glycol butyl ether ester and potassium salt of 2-(2,4,5-trichlorophenoxy)propionic acid (silvex).

The two most effective control methods found from field tests were (a) lowering the lake levels enough to permit complete drying of stems and root crowns and (b) applying butoxyethanol ester of 2,4-D in a 20% granular form. Applications of this herbicide to about 3,700 acres at rates of 20 and 40 lb/A gave results that varied from excellent control in protected embayments to poor control in moving water on these large impoundments.

Type
Research Article
Information
Weeds , Volume 15 , Issue 2 , April 1967 , pp. 95 - 98
Copyright
Copyright © 1967 Weed Science Society of America 

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References

Literature Cited

1. Hall, T. F., Penfound, W. T., and Hess, A. D. 1945. Water level relationships of plants in the Tennessee Valley with particular reference to malaria control. J. Tenn. Acad. Sci. 21:18–59.Google Scholar
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