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Cogongrass in Georgia: 2011 Update
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November 3, 2011
Mark McClure Forest Health Specialist Georgia Forestry Commission 2910 Newton Rd. Albany, GA 31701
Cogongrass In Georgia
“Those who fail to learn from history are doomed to repeat it.” Sir Winston Churchill
Cogongrass In Georgia
Georgia’s cogongrass goal:
100% detection and eradication.
Free Zone
Free Zone Outlier Zone
Outlier Zone Epicenter
Heavily Infested Zone
Cogongrass Infestations in Georgia
Summary of Georgia Cogongrass Sites:
•596 Locations (10/13/11)
•49 Counties
•166+ acres total
•All sites are being treated!
Cogongrass Infestations in Georgia
Summary of Georgia Cogongrass Sites:
•596 Locations (10/13/11)
•49 Counties
•166+ acres total
•All sites are being treated!
Georgia Counties with Known Cogongrass Infestations • Atkinson 1 • Baker 21 • Barrow 1 • Brantley 4 • Brooks 7 • Calhoun 5 • Camden 1 • Carroll 46 • Catoosa 1 • Charlton 20 • Chattahoochee 3 • Clarke 1 • Clay 1 • Clinch 2 • Cobb 1 • Colquitt 7
• Cowetta 1 • Crawford 2 • Crisp 1 • Decatur 132 • DeKalb 1 • Dougherty 1 • Douglas 1 • Early 50 • Echols 8 • Grady 42 • Haralson 3 • Lee 2 • Marion 9 • McDuffie 1 • Meriwether 1 • Miller 30
• Mitchell 24 • Muscogee 1 • Newton 1 • Paulding 2 • Pike 3 • Randolph 6 • Richmond 3 • Seminole 68 • Stewart 3 • Talbot 6 • Telfair 2 • Terrell 1 • Thomas 45 • Troup 4 • Upson 1 • Ware 1 • Worth 18
49 counties with a total of 596 sites as of October 13, 2011 ranging in size from <0.1 to >10.0 acres totaling 166.5 acres
Reports of Cogongrass as of 10-13-11
Title 1994-2006: 59 total sites 2007: 37 sites reported, 96 total sites 2008: 131 sites reported; 227 total sites 2009: 110 sites reported; 337 total sites 2010: 135 sites reported; 472 total sites 2011: 124 sites reported; 596 total sites
Cogongrass locations Pine timber 67.7% Right-of-ways 22.5% Open 7.2% Yard 1.2% Planted 1.3% Food plots 0.03%
Logging Equipment and a small number of tree planter introductions.
R-O-W includes both highway and powerline.
Open includes pastures, pond dams, woods roads, landfill, bar pit and baseball field.
Yard includes flower beds & balled landscape trees.
Planted-planted for pasture decades back.
Status of Cogongrass spots
Title
New spots treated in 2011: 124 sites-26.5 acres
Spots retreated in 2011:
64 sites-36.1 acres
Total spots examined in 2011: 596
All (100%) of the 596 total spots have been treated.
Status of Cogongrass spots
Title
Year 1 Negative 157 26.3% Year 2 Negative 147 24.7% Eradicated 87 14.6% Active 205 34.4% TOTAL 596 100.0%
Cogongrass Success
65.6% all known sites being negative.
157 spots negative for one year.
147 spots negative for two years.
87 spots Eradicated.
All sites have been treated!
Cogongrass Success
Inactive # Counties 0-25% 15 26-50% 4 51-75% 10 76-100% 20
49 Counties with Cogongrass
* Decatur Co.-132 spots. 102 spots or 77% are
negative.
Cogongrass Success
Herbicide treatments & monitoring Control •All areas excluding: •1.5-3% Chopper® + 1% glyphosate+ 1% Dyne-a-pak •1-2% Arsenal AC® + 1% glyphosate+ 1% Dyne-a-pak
•Hardwood sites: •3% glyphosate + 1% Dyne-a-pak
•Treatments being made mid-May thru October. •If possible, sites are burned in winter prior to spraying to remove dense litter layer.
•Monitor annually for 5+ years
Funding & Support Provided by USDA Forest Service
Cogongrass Identification Brochures
Cogongrass banner stand & poster
QUESTIONS ?
Mark McClure Forest Health Specialist Georgia Forestry Commission 2910 Newton Rd. Albany, GA 31701 Office: 229-430-5122 Cell: 229-869-8592 E-mail: [email protected]
