- Author: Dr. Patrick Moran
- Posted by: Guy B Kyser
Biological control of water hyacinth in the Delta is being developed as part of an integrated, adaptive management plan for sustainable, long-term control of water hyacinth. Water hyacinth is one of the most troublesome floating aquatic weeds in the Delta, and one of the key targeted species in the USDA-ARS-funded Delta Region Areawide Aquatic Weed Project (DRAAWP). Biological control can greatly assist the weed control program managed by the Division of Boating and Waterways-California Department of Parks and Recreation (DBW). Before biocontrol can be fully implemented, the control plan must be reviewed by the U.S. Fish and Wildlife Service (USFWS) and the NOAA-National Marine Fisheries Service. USFWS is responsible for protecting...
- Author: John Madsen
- Author: Angela Llaban
The USDA ARS and California State Parks, Division of Boating and Waterways have initiated a study to address concerns that dissolved oxygen may be depleted by plant decomposition under herbicide-treated beds of water hyacinth. Using state-of-the-art miniaturized dissolved oxygen / temperature recording datasondes, the oxygen concentration will be measured before and after treatment of waterhyacinth in channel-side and back-bay areas of the California Sacramento / San Joaquin River Delta, as well as under untreated water hyacinth and in open water areas. Herbicide treatments that will be evaluated include 2,4-D, glyphosate, and imazamox.
The study will be six weeks in duration, and encompass six sites using 25 datasondes. We...