According to the label From the product label
These details were extracted from this product's label PDF.
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EPA registration data for Reg. 5481-689 →
IMPACT SWT™ Herbicide is a systemic herbicide used for the selective control or suppression of emerged broadleaf and grass weeds. It is designed for use in sweet corn (grown for ear, kernel, or seed), sugarcane, and between crops. The active ingredient is Topramezone at 29.7%. This product works by inhibiting carothenoid biosynthesis (HPPD inhibitor, Group 27). For optimal results, apply to actively growing weeds before they exceed maximum size limits. It can be tank-mixed with other herbicides to broaden spectrum control, but users must follow the most restrictive directions of all products in the mixture. When applying, ensure adequate spray coverage and use appropriate droplet sizes to minimize drift. Note that crops under environmental stress (extreme cold or heat) may show temporary injury such as minor twisting or leaf bleaching. Always follow Worker Protection Standard (WPS) requirements and use appropriate personal protective equipment, including long-sleeved shirts, long pants, chemical-resistant gloves, and protective footwear.
Pests covered (2)
emerged broadleaf and grass weedsBroadleaf Weeds
Areas treatable (1)
sweet corn, sugarcane, and between crops
How to treat each type of area 1
sweet corn, sugarcane, and between crops
emerged
| Target pest |
Location |
Rate |
Unit |
Label notes |
| emerged broadleaf and grass weeds |
Outdoor |
0.75 fl oz per acre (for weeds ≤ 4 inches) or 1.0 fl oz per acre (for weeds ≤ 6 inches) |
fl oz per acre |
Check Table 1 and Table 2 for specific weed species and corresponding rates/sizes. |
Mixing instructions 1
| For pests |
Label notes |
| broad spectrum weed control |
May be tank-mixed with other herbicides; follow most restrictive directions of all products in the mixture. |
Worker safety
Re-entry interval (REI)
12
PPE required
Long-sleeved shirt and long pants; Chemical-resistant gloves (barrier laminate, butyl rubber ≥ 14 mils, nitrile rubber ≥ 14 mils, neoprene rubber ≥ 14 mils, or polyvinyl chloride (PVC) ≥ 14 mils, or Viton® ≥ 14 mils); Shoes plus socks.
Timing & weather
- Apply to actively growing weeds.
- Apply before weeds exceed maximum size.
- Apply at least one hour before rainfall or overhead irrigation.
- Do not apply during temperature inversions.
Use restrictions 5
- Do not apply within 30 feet of native plant community.
- Do not apply during temperature inversions.
- Ground boom applications: do not apply when windspeed exceeds 15 mph.
- Aerial applications: do not apply when windspeed exceeds 15 mph.
- Avoid applying to crops under extreme environmental stress.
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