Foliar and Basal Bark Brush Control Herbicide Recommendations
Table of Contents
Foliar Brush Control Herbicide Recommendations
| Species | Chem-Trol/VMS (2002) | UAP/Timberland (2002) | Roadside Manager Recommendations (2011) |
|---|---|---|---|
| Boxelder | Escort 2 oz. Tordon K | Tordon K Garlon Escort XP | Garlon/Escort |
| Chinese Elm | Escort 2 oz. Garlon 4 Krenite Tordon K | Garlon Dicamba Escort XP Tordon 101 | Garlon/Escort |
| Cottonwood | Escort 2 oz. Garlon 4 Krenite | Escort XP Garlon Krenite Dicamba/Vanquish Patron 170 | Garlon/Escort |
| Dogwood | n/a | n/a | Garlon/Escort |
| Eastern Red Cedar | Escort 3 oz. Tordon K with non-ionic surfactant | Escort XP Tordon K | Garlon/Escort — thorough coverage not needed. Krenite — high-volume treatment seems to work on small cedars (< 8 ft.) in July. This may be a function of the surfactant. |
| Green Ash | Krenite Escort | Krenite/Tordon K Escort XP Garlon | Garlon 4/Escort Garlon |
| Honeysuckle | n/a | n/a | Roundup — works well but kills understory. Garlon/Escort — provides partial control; seems to work best when fall-applied. Surfactant improves results. Two applications in the same year (spring and fall) provides better control. Tordon |
| Locust | Tordon K | Tordon K/Tordon 101 2,4-D/Dicamba | Garlon/Escort Krenite Milestone |
| Maple | Escort 2 oz. Krenite Tordon K Garlon 4 | Tordon K Arsenal Krenite or Garlon + Tordon or Escort | Garlon/Escort |
| Mulberry | Escort 2 oz. Garlon Krenite | Tordon K Escort XP Stalker/Arsenal Krenite | Garlon/Escort Garlon |
| Oak | n/a | n/a | Garlon/Escort |
| Olive, Autumn | n/a | n/a | Garlon/Escort — provides partial control; seems to work best when fall-applied. |
| Plum | Escort 2 oz. Garlon Tordon Krenite | Escort XP Garlon Tordon K Krenite | Garlon/Escort |
| Sumac | Escort Arsenal | Escort XP Garlon Tordon K/Tordon 101 Patron 170 | Garlon/Escort |
| Willow | Escort 1 oz. Garlon 4 Krenite | 2, 4-D same as cottonwood | Garlon/Escort Krenite |
Roadside manager notes (2011) — Foliar herbicide:
- Garlon/Escort is a common mix for brush control. Where Garlon (triclopyr) is noted, either Garlon 3A (amine formulation) or Garlon 4 (ester) can be used. Garlon 4 is usually more effective but in hot weather can volatilize drift and affect non-target species. 3A is non-volatile and usually considered the best choice for hot weather.
- We quit spraying Tordon in roadside situations due to standing water and high water tables.
- Arsenal usually kills cool season grass, which can eventually create thistle problems. We limit its use to Japanese Knotweed.
- We've had good luck with Opensight at 3.3 ounces per acre plus an additional 1 ounce per acre of Escort on all of these trees.
- Honeysuckle control is different. When isolated patches are found, consider basal treatment.
Basal Bark Brush Control Herbicide Recommendations
| Species | (2002) | Roadside Manager Recommendations (2011) |
|---|---|---|
| Black Locust | Garlon 4 | Garlon 4 |
| Boxelder | Pathfinder 2 Garlon 4 | Garlon 4 |
| Chinese Elm | Pathfinder 2 Garlon 4 | Garlon 4 |
| Cottonwood | Garlon 4 (+ Stalker optional) | Garlon 4 |
| Eastern Red Cedar | Pathfinder 2 Garlon 4 (poor) | 25% Garlon 4 (works fair-to-well on trees < 8 feet) |
| Honeysuckle | n/a | Garlon 4 (+ 1% Stalker, optional. Hacking bark with pocket saw before spraying improves results. Cut stump treatment is best for bigger plants.) |
| Mulberry | n/a | Garlon 4 (hacking bark with pocket saw before spraying may improve results) |
| Oak | Garlon 4 | Garlon 4 |
| Poplar | Garlon 4 | Garlon 4 |
| Sumac | Pathfinder 2 Garlon 4 | Garlon 4 |
| Willow | Stalker + Garlon 4 | Garlon 4 (no need to include Stalker) |
Roadside manager notes (2011) — Basal bark herbicide:
- We've started adding about 0.5–1% Stalker to our 25% Garlon 4 mix. We used to add 3% Stalker, but our "ring of death" seemed to last for three or more years rather than just one.
- It helps to hack up thick- or corky-barked tress and trees > 2 inches in diameter.
- For most trees, we use 2.5 gallons Garlon plus 4 quarts Stalker plus 12.5 gallons diesel fuel or basal oil to make about a 15 gallon mix.
2002 herbicide recommendations taken from Tree and Brush Control for County Road Right-of-Way.