Introduction

326
Pinnacle SG
Herbicide Group
2- thifensulfuron
(Refer to page 44)
Company:
E. I. duPont Canada (PCP#22002)
Formulation:
Pinnacle SG (PCP#29349): 50% thifensulfuron methyl as a water soluble granule.
• Container size - 8 x 12 g water soluble pouches
Crops and Staging:
Soybean: First fully expanded trifoliate leaf to flower initiation. (Tolerance best when applied up to 2 nd trifoliate stage).
Weeds, Rates and Staging:
Apply up to weeds 4 inches (10 cm) tall or wide.
Pinnacle SG at 3.3 g per acre will control:
º Lady’s-thumb
º Redroot pigweed º Wild Mustard
Pinnacle SG at 4.8 g per acre (one container treats 28.5 to 20 acres) will control the weeds above plus:
º Lamb’s-quarters º Velvetleaf *
º Requires the addition of a non-ionic surfactant such as Agral 90, Agsurf II, or Citowett at 1 L per 1000 L of spray
solution. Oil surfactant blends such as Assist at 0.4 to 0.8 L per acre, or Sure-Mix at 0.5 L per 100 L of spray solution
may be used as adjuvants (check label for use rates).
* The addition of 28-0-0 liquid fertilizer at 4 L per 100 L of spray solution or 2.4 kg of 46-0-0 dry urea fertilizer
may improve control of velvetleaf. Refer to the product label for complete mixing instructions.
A general guide to mixing can be found on page 8.
Application Information:
• Water Volume: Minimum of 45 L per acre.
• Nozzles and Pressure: Maximum 40 psi (275 kPa) when using conventional flat fan nozzles. Low drift nozzles may
require higher pressures for proper performance. Use a combination of nozzles and pressure designed to deliver
thorough, even coverage of ASABE medium droplets.
How it Works:
Refer to Table 9 on page 48.
Effects of Growing Conditions:
Pinnacle applied to crops that have been under stress before application may result in crop injury. Stress conditions within
3 days after application may also result in crop injury.
Weeds under stress conditions at the time of application may not be adequately controlled.
Stress conditions are severe weather conditions, frost, low fertility, drought, water-saturated soils, and disease or insect
damage.
Injury symptoms can be crop discoloration (yellowing, purpling or reddening of leaf veins), or stunting.