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BASF
Chopper Gen2 Herbicide
Chopper Gen2 Herbicide is a professional-grade forestry herbicide that controls various broadleaf weeds, grasses, brush, and vines without the heavy environmental load of older formulas.
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SKU
Chopper Gen2 Herbicide Product Page
Min : 274.06 - Max : 274.06
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Price as of
11/04/25
11/04/25
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Chopper Gen2 Herbicide, manufactured by BASF, is a next-generation post-emergent herbicide that brings exceptional residual control, low-odor application, and powerful vegetation management in forestry sites.
Designed for tough site prep and mid‑rotation hardwood release, this herbicide offers a broader application window from leaf‑on to leaf‑off and consistently performs even under unpredictable weather, thanks to its superior rainfastness. Chopper Gen2 Herbicide is the only herbicide in its class with Transport Technology. This innovation accelerates uptake starting within 2 hours, making the product more rainfast and effective, even against resistant hardwoods.
Chopper Gen2 Herbicide specialized formulation provides extended, reliable vegetation control, making it ideal for site preparation, mid-rotation release, and invasive species management in forest environments. Because it’s systemic, this product travels throughout the entire plant down to the roots. That means when you kill the plant, you kill it completely, preventing regrowth. By removing invasive hardwoods, Chopper Gen2 Herbicide lets sunlight penetrate the forest floor, encouraging native grasses, brambles, and legumes that benefit wildlife.
Tools Needed
A backpack sprayer, handheld pump sprayer, spray rig, brush, injection equipment, hatchet, or machete will be needed.
How to Use
- Step 1: Determine how much Chopper Gen2 Herbicide to use by measuring the square footage of the treatment area. Find the square footage by measuring the treatment area's length and width in feet, then multiplying them together (length X width = square footage). For acreage, take the square footage and divide it by one acre (square footage / 43,560 sq. ft. = acres). For tree-injection applications, apply 1 mL of solution at each injection site. Make at least one injection cut for every three inches of diameter at breast height (dbh) on the target tree. To prepare a dilute solution for stump and cut treatments, mix 8 to 12 fluid ounces of product with one gallon of water. Refer to the product label for specific application rates and restrictions.
- Step 2: Fill the sprayer tank with half the amount of water, add the proper amount of product, and then pour in the remaining half of water into the tank. Close the lid and shake until well-mixed.
- Step 3: For cut and stump treatments, after cutting the tree close to ground level, immediately apply the herbicide mix directly to the cambium ring (just inside the bark).
Where to Use
Chopper Gen2 Herbicide is only for forestry sites.
When to Use
Applications can be made at any time of the year except during periods of heavy sap flow in the spring. Tree injection and cut-stem treatments are most effective in late summer and early fall.
Safety Information
Chopper Gen2 Herbicide is safe for people and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and applying this product.
Do not allow people or pets to enter the treated area until the spray has dried.
Special Considerations
Injury may occur to nontarget or desirable woody plants if they extend from the same root system or their root systems are grafted to those of the treated tree.
| Availability | Online |
| Restricted Use | No |
| Shipping Restrictions * = not registered** = restricted use | 2.5 Gallon: VT** |
| Brand | BASF |
| Keith's Pro Tips | "Applying a thick layer of landscape fabric can prevent tree seeds from germinating by blocking sunlight." |
| Product Drawbacks | This product is toxic to plants. |
| Target Pests | Alder, American Beech, Annual Bluegrass, Annual Spurge, Arrowwood, Ash, Aspen, Autumn Olive, Bahiagrass, Baldcypress, Barnyardgrass, Beardgrass, Bermudagrass, Big Bluestems, Birch, Blackgum, Blueberry, Boxelder, Brazilian Peppertree, Broadleaf Signalgrass, Broom Snakeweed, Bull Thistle, Burclover, Burdock, Camelthorn, Camphorweed, Canada Bluegrass, Carolina Geranium, Ceanothus, Cheat, Cherry, Chinaberry, Chinese Tallowtree, Chinquapin, Clover, Cocklebur, Cogongrass, Common Chickweed, Common Ragweed, Cottonwood, Crabgrass, Cypress, Dallisgrass, Dandelion, Diffuse Knapweed, Dock, Dogfennel, Dogwood, Downy Brome, Eucalyptus, Fall Panicum, Feathertop, Fescue, Fiddleneck, Field Bindweed, Filaree, Fleabane, Florida Pusley, Foxtail, Gallberry, Giant Ragweed, Giant Reed, Goldenrod, Goosegrass, Greenleaf Manzanita, Guineagrass, Hawthorn, Hedge Bindweed, Henbit, Hickory, Honeysuckle, Horseweed, Huckleberry, Indian Mustard, Italian Ryegrass, Itchgrass, Japanese Bamboo, Johnsongrass, Junglerice, Kentucky Bluegrass, Knotweed, Kochia, Lambsquarters, Lovegrass, Macartney Rose, Madrone, Maple, Melaleuca, Milkweed, Minerslettuce, Morningglory, Mouseear Chickweed, Mulberry, Mullein, Multiflora Rose, Nettleleaf Goosefoot, Orchardgrass, Oxeye Daisy, Panicum, Paragrass, Pepperweed, Persimmon, Phragmites, Pigweed, Pinegrass, Plantain, Poison Ivy, Poison Oak, Pokeweed, Poplar, Prairie Cordgrass, Prairie Threeawn, Primrose, Privet, Prostrate Knotweed, Puncturevine, Purple Loose Strife, Purslane, Quackgrass, Rabbitbrush, Red Alder, Red Maple, Redvine, Reed Canarygrass, Russian Knapweed, Russian Thistle, Saltbush, Saltcedar, Saltgrass, Sand Dropseed, Sandbur, Sassafras, Shepherdspurse, Silverleaf Nightshade, Smartweed, Smooth Brome, Sorrel, Sourwood, Sowthistle, Sprangletop, Stinging Nettle, Sumac, Sunflower, Sweetclover, Sweetgum, Sycamore, Tanoak, Tansymustard, Texas Thistle, Timothy, Titi, Torpedograss, Tree-Of-Heaven, Trumpetcreeper, Vaseygrass, Velvetleaf, Virginia Creeper, Waxmyrtle, Western Ragweed, Wild Barley, Wild Buckwheat, Wild Carrot, Wild Grape, Wild Lettuce, Wild Oat, Wild Parsnip, Wild Rose, Wild Turnip, Willow, Wirestem Muhly, Witchgrass, Wooly Cupgrass, Woolyleaf Bursage, Yaupon, Yellow Poplar, Yellow Starthistle, and Yellow Woodsorrel. |
| Application Equipment | Backpack Sprayer, Injection System, Pump Sprayer |
| Application Methods | Broadcast Spray, Injection |
| Active Ingredient | isopropylamine salt of imazapyr 26.7% |
| Product Type | Herbicide |
| Formulation | Emulsifiable Concentrate (EC) |
| Application Rate | For tree-injection applications, apply 1 mL of solution at each injection site. Make at least one injection cut for every three inches of diameter at breast height (dbh) on the target tree. To prepare a dilute solution for stump and cut treatments, mix 8 to 12 fluid ounces of product with one gallon of water. |
| Shelf Life | Chopper Gen2 Herbicide will last for 3 years when stored in a dry, clean area. |
| Yield | 2.5 gallons of Chopper Gen2 Herbicide will cover 5 to 10 acres. |
| Use Sites | Outdoors |
| Time to Kill | Treated plants stop growing soon after herbicide application. Chlorosis first appears in the youngest leaf tissue. In perennials, the herbicide is translocated into the roots, thus preventing resprouting. Chlorosis and tissue necrosis may not be apparent in some species for several weeks after application. Woody plants, brush, and trees may not display the full extent of herbicide control until several months following application. |
| Comparable Products | TVC Total Vegetation Control, Imazapyr 4 SL Herbicide |
| Incompatible Home Siding | Brick, Hardie Plank, Stone Veneer, Stucco, Wood, Vinyl |
| EPA Registration # | 241-430 |
| Restricted Use | No |
|---|---|
| Availability | Online |
| Signal Word | CAUTION |
| Keith's Pro Tip | "Applying a thick layer of landscape fabric can prevent tree seeds from germinating by blocking sunlight." |
| Time to Kill | Treated plants stop growing soon after herbicide application. Chlorosis first appears in the youngest leaf tissue. In perennials, the herbicide is translocated into the roots, thus preventing resprouting. Chlorosis and tissue necrosis may not be apparent in some species for several weeks after application. Woody plants, brush, and trees may not display the full extent of herbicide control until several months following application. |
| Chemical Type | Herbicide |
| Formulation | Emulsifiable Concentrate (EC) |
| Application Methods | Broadcast Spray, Injection |
| Product Drawbacks | This product is toxic to plants. |
| Active Ingredient | isopropylamine salt of imazapyr 26.7% |
| Application Equipment | Backpack Sprayer, Injection System, Pump Sprayer |
| Mix Rate | For tree-injection applications, apply 1 mL of solution at each injection site. Make at least one injection cut for every three inches of diameter at breast height (dbh) on the target tree. To prepare a dilute solution for stump and cut treatments, mix 8 to 12 fluid ounces of product with one gallon of water. |
| Use Sites | Outdoors |
| Yield | 2.5 gallons of Chopper Gen2 Herbicide will cover 5 to 10 acres. |
| EPA Registration No. | 241-430 |
| Shelf Life | Chopper Gen2 Herbicide will last for 3 years when stored in a dry, clean area. |
| Comparable Products | TVC Total Vegetation Control, Imazapyr 4 SL Herbicide |
| Children or pets? | No |
| Property Characteristics | Grazing Animals |
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