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2005 "Volunteers Working With Invasives"
Grants Report Form

Display Report


Project Title: Exotic invasive plant mapping and control on the A
Region: 2
Station: Attwater Prairie Chicken NWR
Contact Person:
Name and Phone Number
Terry Rossignol / Donna Roach (979) 234-3021
Project Description:
(Up to 250 words)
This project involves mapping and treatment, using integrated pest management (IPM), of exotic invasive plant species on the Attwater Prairie Chicken National Wildlife Refuge. Target plants include deep-rooted sedge (Cyperus entrerianus), Macartney rose (Rosa bracteata), and Chinese tallow (Sapium sebiferum). All of these species aggressively invade coastal prairie grasslands found on the refuge and negatively impact the critically endangered Attwaters prairie-chicken that is known to exist in the wild only at this Refuge and one other 2303 acre property owned by the Texas Nature Conservancy. IPM control methods will include herbicide, prescribed fire, and mechanical treatment as appropriate for each species. Since deep-rooted sedge is a relatively new species to coastal Texas, this project will also include the establishment of study plots to evaluate the most effective treatment for this aggressive invader and to learn more about its physiology. These plots will be established in May 2005 and will be monitored for two years. Invasive species mapping on the 10,528 acre Refuge could reasonably be accomplished within one year with volunteer assistance. Herbicide applications will primarily take place in the fall and the herbicides purchased with this grant will allow us to treat invasives for a minimum of two years.
List of Invasives Species Targeted:Common NameScientific Name
  Deep-rooted sedge Cyperus entrerianus
Macartney rose Rosa bracteata
Chinese tallow Sapium sebiferum
Project Status: InProgress
Project Completion Date
or Estimated Completion Date:


Volunteer Affiliation:
(Check all that apply)
            VA_GradIntern        VA_StudentConsAssoc            VA_Other
Volunteer Involvement:
Describe the type of work the volunteers performed. (Up to 150 words)
Volunteers scoured the Refuge looking for deep-rooted sedge and spot sprayed it with a 2% solution of glyphosate whenever possible. They have taken GPS units into the field and mapped occurrences of deep-rooted sedge, downloaded the data into a GIS and produced maps depicting locations of deep-rooted sedge on the Refuge. A volunteer from Estes, Inc (herbicide distributor) experimented with various concentrations and types of herbicides to determine which was more effective on the sedge. Graduate interns have established study plots and have begun collecting data on deep-rooted sedge.
Total Number of Volunteers: 9
Total Number of Volunteer Hours: 800
List both new and existing partnerships utilized in this project. (Up to 150 words).
Partners on this project include the Student Conservation Association; Stephen F. Austin State University; Estes, Inc.; Monsanto; and BASF.


Project Results:
Give an overview of the results of the project. Include quantifiable measure of success, such as maps produced, efficacy of control measures, number of sites where invasions were detected early and responded to, number of community contacts, etc. (Up to 250 words).
This project is ongoing, but as of this date the following have been accomplished: 1) The entire 10,528 acre Refuge has been surveyed and mapped for the occurrence of deep-rooted sedge (Cyperus entrerianus). 2) Approximately 63 acres of deep-rooted sedge were spot treated in June, July, and August with 2% glyphosate. While we do not yet know if the parent plants were killed, at a minimum they were prevented from setting seed this year. 3) Four ½ acre sections of deep-rooted sedge were treated in August with 3 different concentrations of imazapic and one of sulfosulfuron. The treatments had little to no effect and it is theorized that plants in such an advanced growth stage do not respond well to herbicides. 4) Four 100 x 90 m blocks were established in deep-rooted sedge infested areas. These plots and other infested sites on the Refuge will be used to quantify deep-rooted sedge response to a combination of prescribed fire and herbicide treatments, to document carbohydrate trends to determine the most effective time for herbicide treatments, and to quantify germination requirements and response to prescribed fire treatments.
Number of Acres Treated: 65
Number of Acres Inventoried and/or Mapped: 10,528 for deep-rooted sedge
Number of Acres Restored: The success in controlling the sedge will not be k


Budget: Account for funds in broad categories such as equipment, volunteer stipends, travel, coordinator salary/contract, etc.

Total Grant Amount:

$ 29968

Breakdown of Expenditures:


Total $ Spent
% of Total Grant
Equipment / Supplies 5006.42 16.7
Chemical 14761.58 49.3
Biocontrol Agents 0 0
Travel 0 0
Volunteer Stipends 10000 33.4
Volunteer Coordinator Salary/Contract 0 0
Restoration Materials 0 0
Other 200 0.6
TOTAL 29968 100

Recommendations: (OPTIONAL)
How useful was this program for meeting refuge invasive species objectives and how can it be improved?
This funding and our volunteers have been invaluable in accomplishing our invasive species management on the Refuge.


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