- Author: Guy B Kyser
- Author: John Madsen
In June 2016 the Madsen team revisited the site of our 2015 surfactant study to establish a more extensive test of aquatic herbicides for controlling waterhyacinth in the Delta.
Recall that in summer 2015 we established a preliminary trial to evaluate waterhyacinth response to different aquatic surfactants with glyphosate, using our famous floating quadrats with color-coded swim noodles (Figure 1).
By season's end, the crawdads had chewed up most of the swim noodles, so this year the quadrats underwent a slight redesign. We used thinwall 2” PVC, no noodles, and no fencing (Figure 2). (Calculating the enclosed volume and the weight per linear foot, we figured we had 8 to 10 pounds of ‘float' per...
- Author: Guy B Kyser
This is the time of year when small islands of waterhyacinth break loose from their parent mats, seeking new marinas to clog up. The Madsen team is embedding radio dog collars into freefloating mats to track their movements with the currents, tides, and wind.
This study is conducted in cooperation with DRAAWP, the Delta Region Areawide Aquatic Weed Project.
- Posted by: Gale Perez
The City of San Diego, Park and Recreation Department is requesting applications for Pesticide Applicators. Two new positions are being added. One position will be working in natural habitat and open space areas and the other position in community park areas. The closing date has been extended to July 6, 2016.
Click here for the
- Posted by: Gale Perez
Position Announcement
OPS Research Biological Science Technician, Center for Aquatic and Invasive Plants, University of Florida
The Center for Aquatic and Invasive Plants at the University of Florida is seeking a Biological Science Technician to conduct research on Old World Climbing Fern (Lygodium microphyllum) biology, ecology, and management in south and central Florida. This is a grant funded, non-permanent position with a minimum duration of three to five years.
Location: The home location of the position is somewhat negotiable and may be in south Florida between Fort Pierce and Fort Lauderdale. However, there is potentially housing available at Loxahatchee National Wildlife Refuge at a...
- Author: Cheryl A. Wilen
There has been more than the usual number of questions about what I am calling "bio-based" herbicides recently. Arguably, this is coming from news that some school districts and cities specifically calling out the use of glyphosate on the properties they manage. Landscaping departments want to know which of the products available work the best.
To start, please be aware that all of these products are contact herbicides that will not move through the plant. Therefore, they will not be effective if you are trying to get to any underground organ such as the roots, rhizomes, tubers, etc. of any perennial plant. Do not try to make a head to head comparison...