Introduction

383
Formulation:
336 g/L topramezone formulated as a suspension.
• Container size - 8 L
º Armezon: 0.6 L
º Impact: 8 L
Crops and Staging:
Corn (field†, seed, sweet †† ): From the 1 to 7 leaf stage
†
Including both conventional and herbicide tolerant varieties.
††
NOTE: Tolerance of sweet corn varieties to topramezone and its mix partners may be variable. When tolerance is
unknown, check with the supplier of seed and/or apply to a small area first to assess tolerance.
Weeds and Staging:
The following weeds are controlled with topramezone unless otherwise indicated:
Topramezone MUST BE applied in tank mix with one of the herbicide options indicated in ‘Tank Mixes:’
Weed Control
• Grass weeds below from the 1 to 4 leaf stage:
º Barnyard grass* º Foxtail (green
and yellow)*
• Broadleaf weeds below from the 1 to 8 leaf stage:
º Chickweed
(common)*
º Kochia
(up to 10 cm)**
º Lamb’s-quarters*
º Lady’s-thumb*
º Nightshade (eastern
black)
* Suppression only.
** Armezon only. All types including glyphosate-resistant varieties.
º Pigweed (redroot,
green)
º Ragweed (common)
º Velvetleaf*
º Volunteer canola (up
to 8 leaf ) including
glyphosate-tolerant
varieties**
º Wild mustard
Rates:
15 mL per acre
Must be applied with either:
• Merge adjuvant at 0.5 L per 100 L of spray solution
-or-
• Assist (or XA Oil concentrate*) at 1.25 L per 100 L plus UAN (liquid 28-0-0) at 1.25 L per 100 L of spray solution.
Maximum one application of topramezone per season.
Application Information:
• Water Volume: Minimum 81 L per acre.
• Nozzles and Pressure: Use 20 to 40 psi (140-276 kPa) if applying without drift reduction nozzles. Drift reduction
nozzles may require higher pressures for proper performance. Select the nozzle and pressure combination that
produces of ASABE medium droplets while maintaining good coverage of foliage.
How it Works:
Refer to Table 9 on page 48.
Effects of Growing Conditions:
When weeds are stressed because of drought, flooding, hot or cool temperatures, weeds are not actively growing, control
may be reduced.