Pesticide
Product Reference
Reference data for fungicides, herbicides, insecticides, and nematicides used in published TPMR efficacy trials. Always read the current product label before use.
Product Type
Herbicide
Weed management
Reference Data Only — Always Read the Current Product Label Before Use
Information on this page is provided for general reference purposes and may not reflect the most current label, registration status, approved use sites, application rates, or restrictions for your state or region. Pesticide registrations, use patterns, and label language are subject to change without notice. It is the applicator's legal responsibility to read and follow the current product label in its entirety prior to each use. TPMR assumes no liability for errors, omissions, or decisions made based on this reference data.
Tenacity
Mesotrione 4.0% · Suspension Concentrate (SC)
Manufactured by Syngenta · EPA Reg. No. 100-1139
Mesotrione
Triketone
4 hours
CAUTION
Mode of Action
HPPD Inhibitor
Mesotrione inhibits 4-hydroxyphenylpyruvate dioxygenase (HPPD), an enzyme in the carotenoid biosynthesis pathway. Inhibition depletes carotenoids required to protect chlorophyll from photooxidation. Affected plants bleach white before necrosis, a characteristic visual symptom. Activity is both pre- and post-emergent.
Labeled Weed Targets
Application
Rate Range
5 – 8
fl oz / acre
Interval
2 – 3 applications, 2–3 weeks apart
days between applications
Resistance Management
Low resistance risk. HPPD inhibitor resistance is uncommon in turfgrass weed populations. To reduce selection pressure, tank-mix with herbicides from a different HRAC group where label permits.
TPMR Reports Using This Product
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