Weed Technology (2008) 22, 146-150

Jeremy G. Slade, Angela G. Poovey and Kurt D. Getsinger (2008)
Concentration-exposure time relationships for controlling sago pondweed (Stuckenia pectinata) with endothall
Weed Technology 22 (1), 146-150
Abstract: The submersed macrophyte, sago pondweed, frequently grows to nuisance levels in water conveyance systems throughout the western United States and can cause problems in lakes, reservoirs, and other water bodies. The liquid dipotassium and dimethylalkylamine salt formulations of endothall were evaluated for controlling sago pondweed using short exposure times (3 to 24 h) under controlled environmental conditions (14 : 10 h light : dark; 21.5 C). Endothall treatments ranged from 1 to 10 mg ai/L (dipotassium salt) and 0.5 to 5 mg ae/L (dimethylalkylamine salt). Sixteen concentration and exposure time (CET) combinations were evaluated in each study. At 4 wk after treatment, all CET combinations significantly reduced shoot biomass (43 to 99%) of sago pondweed compared with the untreated reference. Reduction in shoot biomass was greater in plants that received higher herbicide doses and longer exposure times. In addition, more than half of the endothall CET combinations controlled sago pondweed by at least 90%, with some providing >98% control. At the endothall CETs evaluated, regrowth of sago pondweed could occur after 4 wk, and some level of retreatment might be required to maintain plant control throughout the growing season. Results indicate that endothall shows promise as an alternative vegetation management tool in flowing-water environments.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Stuckenia pectinata (weed)