- Author: Thomas Jabusch
- Posted by: Guy B Kyser
Arundo donax is devastating to riparian habitat and becoming increasingly widespread in the Sacramento – San Joaquin Delta. To counter this growing problem, the Sacramento-San Joaquin Delta Conservancy (Delta Conservancy) envisions a delta-wide, long-term Arundo Control and Restoration Program to treat Arundo infestations and restore native vegetation to improve habitat along Delta waterways.
Since 2014, the Delta Conservancy has led a pilot project controlling Arundo and restoring riparian forest habitat in the Cache Slough Complex, funded by the California Department of Water Resources (DWR), and partnered with the Solano Resource Conservation District (SRCD) and Sonoma Ecology Center (SEC). As part of the Delta...
- Posted by: Guy B Kyser
Occasional good news on the weed front...
"SACRAMENTO — The California Department of Food and Agriculture (CDFA), working in cooperation with the Shasta County Agricultural Commissioner's office, has eradicated two hydrilla infestations within the cites of Redding and Anderson, ending a quarantine that began on July 18, 1996. Hydrilla, an invasive aquatic weed, was last detected in Shasta County in 2006."
https://www.morningagclips.com/hydrilla-eradicated-from-shasta-county/
- Author: Karen Jetter
- Author: Kjersti Nes
- Posted by: Guy B Kyser
Attached is a presentation on the economics of controlling invasive aquatic weeds in the Sacramento-San Joaquin Delta. This was presented by Karen Jetter at the Delta Region Areawide Aquatic Weeds Program (DRAAWP) stakeholders meeting in October 2018.
- Author: Dr. Paul Pratt
- Editor: Guy B Kyser
It may be widely understood that most aquatic and wetland weeds are spread by water currents, but the patchwork of colonizing exotic plants can be puzzling. Why do weeds establish in some places but not others? Generally, the number of propagules (seeds or plant fragments) moving in a watershed is assumed to increase downstream. This assumption influences management decisions, such as prioritizing management efforts between upstream and downstream areas of a river to reduce reinvasion.
Uruguay waterprimrose (Ludwigia hexapetala) is an emergent aquatic weed from South America which has invaded many riverine wetland ecosystems in the western US and Europe. This is a clonal plant which can reproduce asexually via shoot...
- Author: John Madsen
- Posted by: Guy B Kyser
We are doing a trial of eleven aquatic herbicides for their potential to control Brazilian waterweed (Egeria densa). The active ingredients being tested are bispyribac sodium, carfentrazone, copper-ethylenediamine complex, diquat, dipotassium salt of endothall, the dimethylalkylamine salt of endothall, florpyrauxifen-benzyl, flumioxazin, fluridone, imazamox, and penoxsulam. The study is a twelve-week static exposure of a single initial treatment, using all of the 50 tanks in the mesocosm facility. While not all of these aquatic herbicides would be allowed in the Sacramento/San Joaquin River Delta, we should at least know what might be useable in other habitats near the Delta. Currently, California State Parks Division of...
