Carfentrazone-ethyl Pond Dissipation and Efficacy on Floating Plants

Koschnick, Tyler J. and Haller, W. T. and Chen, A. W. (2004) Carfentrazone-ethyl Pond Dissipation and Efficacy on Floating Plants. Journal of Aquatic Plant Management, 42, pp. 103-108.

PDF (The document's language is English .) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (164kB) | Preview
Official URL:


Carfentrazone-ethyl (CE) is a reduced risk herbicide that is currently being evaluated for the control of aquatic weeds. Greenhouse trials were conducted to determine efficacy of CE on water hyacinth ( Eichhornia crassipes (Mart.) Solms- Laub.), water lettuce ( Pistia stratiotes L.), salvinia ( Salvinia minima Baker) and landoltia (Landoltia punctata (G. Mey.) Les & D. J. Crawford ) . CE controlled water lettuce, water hyacinth and salvinia at rates less than the maximum proposed use rate of 224 g ha -1 . Water lettuce was the most susceptible to CE with an EC 90 of 26.9 and 33.0 g ha -1 in two separate trials. Water hyacinth EC 90 values were calculated to be 86.2 to 116.3 g ha -1 , and salvinia had a similar susceptibility to water hyacinth with an EC 90 of 79.1 g ha -1 . Landoltia was not adequately controlled at the rates evaluated. In addition, CE was applied to one-half of a 0.08 ha pond located in North Central, Florida to determine dissipation rates in water and hydrosoil when applied at an equivalent rate of 224 g ha -1 . The half-life of CE plus the primary metabolite, CE-chloropropionic acid, was calculated to be 83.0 h from the whole pond, and no residues were detected in water above the limit of quantification (5 μg L -1 ) 168 h after treatment. CE dissipated rapidly from the water column, did not occur in the sediment above the levels of quantification, and in greenhouse studies effectively controlled three species of aquatic weeds at relatively low rates.(PDF contains 6 pages.)

Item Type: Article
Title: Carfentrazone-ethyl Pond Dissipation and Efficacy on Floating Plants
Personal Creator/Author:
Koschnick, Tyler J.
Haller, W. T.
Chen, A. W.
Refereed: Yes
Journal or Publication Title: Journal of Aquatic Plant Management
Volume: 42
Page Range: pp. 103-108
Date: 2004
Issuing Agency: Aquatic Plant Management Society, Inc.
Uncontrolled Keywords: Salvinia minima, Landoltia punctata, Pistia stratiotes, Eichhornia crassipes, protox inhibitor, half-life
Subjects: Management
Item ID: 1781
Depositing User: Stephanie Haas
Date Deposited: 12 Dec 2008 20:27
Last Modified: 29 Sep 2011 20:03

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...