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Title: Evaluation of endothall/adjuvant mixtures in flowing water
Authors: Getsinger, Kurt D.
Westerdahl, Howard E.
Keywords: Adjuvants
Eurasian watermilfoil
Myriophyllum spicatum
Aquatic plant control
Flowing water
Poly Control
Aquatic Plant Control Research Program (U.S.)
Publisher: U.S. Army Engineer Waterways Experiment Station
Series/Report no.: Miscellaneous Paper (Aquatic Plant Control Research Program (U.S.)) ; no.Miscellaneous Paper A-88-1
Abstract: Four endothall/adjuvant formulations (inverts Asgrow 403 and I'vod and polymers Nalquatic and Poly Control) were evaluated for endothall release profiles and control of Eurasian watermilfoil (Myriophyllum spicatum L.) at flow velocities of 1.5 and 3 cm/sec. Endothall release profiles from the adjuvant formulations were compared with release profiles from conventional liquid endothall formulations. All of the endothall/adjuvant formulations released endothall for longer periods than did the conventional endothall formulation at the 1.5-cm/sec flow velocity. The polymer formulations released endothall for longer periods (72 to 84 min posttreatment) than the invert formulations (36 to 48 min posttreatment). At the 3-cm/sec flow velocity, endothall residues were below detection (0.01 mg/l) by 12 min posttreatment when using all of the endothall formulations. In comparison, endothall release profiles were 12 to 132 min shorter than 2,4-dichlorophenoxyacetic acid profiles obtained from a previous study using identical adjuvants and flow velocities. The extended release profiles of the polymers Nalquatic and Poly Control make these adjuvants the most promising of those tested for use with endothall in stands of Eurasian watermilfoil where flow velocities are < 3 cm/sec.
Description: Miscellaneous Paper
Gov't Doc #: Miscellaneous Paper A-88-1
Rights: Approved for public release; distribution is unlimited
Appears in Collections:Miscellaneous Paper

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