This table includes Natural Resources Spray Areas (Staff) for Week of May 19-May 23, 2025.
| Natural Resources Area | Target Species | Chemical Trade Name |
|---|---|---|
| Undeveloped Dry Creek Park | Canada Thistle, Biennial Thistles, Hoary Cress, Bindweed, Kochia | Alligare Chlorsulfuron 75, Milestone, Method 240SL, Vista XRT, Vision, Dupont Perspective |
| Dry Creek corridor 75th St. to Hover St. | Canada Thistle, Biennial Thistles, Hoary Cress, Bittersweet Nightshade, Yellow Flag Iris, Kochia | Alligare Chlorsulfuron 75, Milestone, Garlon 3A, Polaris, Clearcast, Rejuvra, Vista XRT, Vision |
| Left Hand Creek from South Pratt Pkwy to confluence with St. Vrain | Canada Thistle, Biennial Thistles, Hoary Cress, Yellow Flag Iris, Kochia | Alligare Chlorsulfuron 75, Milestone, Polaris, Clearcast, Rejuvra, Vista XRT, Vision |
| Roger's Grove District Park and Open Space | Canada Thistle, Biennial Thistles, Hoary Cress, Yellow Flag Iris, Kochia | Alligare Chlorsulfuron 75, Milestone, Polaris, Clearcast, Rejuvra, Vista XRT, Vision |
| Peschel Open Space | Canada Thistle, Biennial Thistles, Hoary Cress, Yellow Flag Iris, Kochia | Alligare Chlorsulfuron 75, Milestone, Polaris, Clearcast, Rejuvra, Vista XRT, Vision |
| St. Vrain corridor at Sandstone Ranch Nature Area | Canada Thistle, Biennial Thistles, Hoary Cress, Yellow Flag Iris, Kochia | Alligare Chlorsulfuron 75, Milestone, Polaris, Clearcast, Rejuvra, Vista XRT, Vision |
| St. Vrain Greenway from Golden Ponds to 119th Trailhead | Canada Thistle, Biennial Thistles, Hoary Cress, Yellow Flag Iris, Kochia | Alligare Chlorsulfuron 75, Milestone, Polaris, Clearcast, Rejuvra, Vista XRT, Vision |
