- Author: Sharon Lawler
- Author: Maribel Portilla
- Posted by: Guy B Kyser
Mosquito research by Maribel Portilla and Sharon Lawler recently included an experiment on how Egeria, or Brazilian water weed, affects mosquito populations. Egeria is a submersed aquatic weed that can cause problems in channels and irrigation waterways. Mosquitoes also breed in stagnant waters, but, we asked, is this because of the weeds?
We used large cattle-watering tanks to simulate stagnant, back-water areas with and without infestations of Egeria (Figure 1). Five tanks had no weeds, five had healthy Egeria, and five had Egeria that was sprayed with the herbicide fluridone. We added zooplankton and insects colonized naturally.
Interestingly, there were fewer...
- Author: Micheal Finnell
- Editor: Guy B Kyser
Micheal Finnell is an Environmental / GIS Assistant with California State Parks Division of Boating and Waterways.
To provide quantitative metrics of herbicide treatment efficacy for the Division of Boating and Waterways' Submersed Aquatic Vegetation (SAV) Program
- Apply consumer-grade echosounders to map SAV in the Sacramento-San Joaquin Delta
- Process sonar files using Biobase, an online GIS algorithm
- Generate SAV geo-spatial products and change detection using the SAV Efficacy Tool
- Conduct qualitative Biobase accuracy assessment
Submersed aquatic vegetation...
- Author: Patrick Moran
- Editor: Guy B Kyser
The giant invasive grass arundo (Arundo donax), one of the weeds targeted under the USDA-ARS-funded Delta Region Areawide Aquatic Weed Project (DRAAWP), has been re-acquainted with one of its natural enemies imported from arundo's native range. A tiny insect called the arundo armored scale (Rhizaspidiotus donacis) has been successfully released in the Sacramento River watershed and in the Delta.
Arundo forms dense stands across at least 10,000 acres in California, and over 100,000 acres in other arid riparian areas such as the Lower Rio Grande Valley of Texas and Mexico. Other control methods such as herbicide application, mechanical removal, mowing or burning have been used to reduce arundo populations in...
- Posted by: Gale Perez
Here's something from the Aquatic Plant Management Society blog :: posted Feb. 2017
(Original source: East County Today)
DBW Begins Herbicide Treatment in the Delta for Water Hyacinth and Egeria.../span>
- Author: Gale Perez
John Madsen shared the following information.
AQUATIC PLANT MANAGEMENT SOCIETY, Inc.
Center for Aquatic and Invasive Plants
7922 NW 71st Street
Gainesville, FL 32653
APMS GRADUATE STUDENT RESEARCH GRANT 2017
A graduate student research grant on the biology, ecology, and management of starry stonewort...