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Interaction of Calcium and 2,4-D on Eurasian Watermilfoil

Published online by Cambridge University Press:  12 June 2017

Ronald A. Stanley
Ronald A. Stanley*
Affiliation:
Environ. Biol. Branch, Div. of Environ. Planning, TVA, Muscle Shoals, AL 35660
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Abstract

The interaction of 2,4-D [(2,4-dichlorophenoxy) acetic acid], substrate, and calcium on eurasian watermilfoil (Myriophyllum spicatum L.) was determined. The effectiveness of 2,4-D was twice as great on plants grown on a substrate containing soil as it was on plants grown on a sand substrate. The presence of calcium chloride in sand culture during the period of 2,4-D uptake caused comparable or greater increases than sand culture without calcium in the effectiveness of 2,4-D. Possible differences in effectiveness of field treatments were calculated to be 48% greater at the highest natural concentrations of calcium than at the lowest concentrations in water of the Tennessee Valley. Calcium concentration and substrate altered the effectiveness of 2,4-D on eurasian watermilfoil.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 3 , May 1975 , pp. 182 - 184
Copyright
Copyright © 1975 by the Weed Science Society of America 

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