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Dichlobenil as a Herbicide in Fish Habitats

Published online by Cambridge University Press:  12 June 2017

Charles R. Walker
Charles R. Walker*
Affiliation:
Missouri Conservation Commission, Fisheries Section, Columbia, Missouri
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Abstract

Application of 20 to 40 lb/A dichlobenil made prior to emergence accomplished various degrees of control of pondweeds (Potamogeton diversifolius, P. foliosus, P. pectinatus, P. pusillus) and a slender naiad (Najas flexilis). Coontail (Ceratophyllum demersum) was affected only by the higher dosage. Limited control and growth inhibition was achieved on several forms of algae in early spring applications. However, applications made to rooted submersed aquatic plants and filamentous algae (Cladophora, Pithophora and Chara) at postemergence stage of development had little herbicidal effect.

Dichlobenil was not acutely toxic to fish at herbicidal concentrations. The range of median tolerance limits was 10 to 20 ppmw for pumpkinseed (Lepomis gibbosus), bluegill (L. macrochirus), redear sunfish (L. microlophus), and largemouth bass (Micropterus salmoides).

Type
Research Article
Information
Weeds , Volume 12 , Issue 4 , October 1964 , pp. 267 - 269
Copyright
Copyright © 1964 Weed Science Society of America 

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