CORRELATION OF ENDOTHAL AND FLUORESCENT DYE CONCENTRATIONS FOLLOWING CONCURRENT APPLICATION TO TIDAL CANALS

Herbicide residue samples are expensive and time-consuming to collect and analyze. The potential for using 'Rhodamine WT' to simulate endoth al dissipation in moving water was tested in the weed-infested Three S isters tidal canals (Citrus Co., FL). Concurrent applications were mad e using a variety of application techniques. Significant correlations between dye and endothal concentrations were found in each treatment, indicating that 'Rhodamine WT' concentrations can be used to predict e ndothal movement and concentrations. The ratios of endothal:dye half-l ives were similar (0.2, 0.25, 0.17) for three of the application metho ds tested, indicating that estimations of dye half-lives could be used to predict those for endothal.