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Herbicide Summary - Tahoe® 3A

Used to control broadleaf weeds and woody plants; directed spray applications for conifer release and broadcast applications for conifer planting site preparation.
Updated:
March 20, 2023

Common Name: Triclopyr-44.4%

Formulation: Water-soluble liquid (amine salt)

Signal Word: Danger

Toxicity: Slightly toxic; oral LD (50): 1,036 mg/kg for rats

Use Classification: General use

Minimum Required Personal Protective Equipment: Coveralls, shoes, socks, protective eyewear, and chemical-resistant gloves

Carriers: Water

Activity: Absorbed through foliage and cut surface

Mode of Action: Acts as a systemic herbicide deregulating plant metabolic pathways; accumulates in plant meristems (growth regions), causing uneven cell division and growth

Selectivity: Little or no impact on grasses

Precautions: Can cause irreversible eye damage; do not use in areas with permeable soils and high water tables

Application Methods: Foliar spray, cut stump, stem injection, frill girdle

Manufacturer: Nufarm

David R. Jackson
Former Extension Educator, Renewable Natural Resources
Pennsylvania State University