Pinnacle: thifensulfuron-methyl

Trade Names	Pinnacle
Formulation	DF
Guaranteed active concentration	75%
Groups	2
Ontario Schedule	3
Winter Storage	C
Chemical Family	Sulfonyl urea
Crop and/or Non-Crop Registrations	Soybeans, tomatoes
Sensitive Weeds	Redroot pigweed, lamb's-quarters, velvetleaf, lady's-thumb and wild mustard.
Uptake and Translocation	Following foliar application, the herbicide is rapidly absorbed and translocated in both the xylem and phloem to growing points of sensitive weeds.
Basis of Selectivity	Inhibition of acetolactase synthase (ALS) enzyme in susceptible plants that leads to a rapid cessation of cell division and plant growth. Tolerant species rapidly metabolize the herbicide into non-phytotoxic metabolites.
Application Methods	Postemergence.
Residual Activity	Rapid soil microbial degradation. Half-life of 5 days at 25ºC soil temperatures.
Unique Characteristics	Labelled species can be controlled up to 10 cm in height. Redroot pigweed is very sensitive. Typical symptoms of plant death (leaf crinkling, curling, chlorosis) occur 5-10 days after application depending on the growing conditions. Velvetleaf control is greatly enhanced by the inclusion of ammonium containing fertilizer (such as a UAN solution).
Manufacturer / Registrant	Dupont Canada Inc.