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Herbicide Summary - Garlon 4 Ultra

Controls unwanted woody plants, including mountain laurel, as well as annual and perennial broadleaf weeds; broadcast treatments for site preparation and release of conifers.

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Updated:

January 3, 2023

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Herbicide application; Photo by vvoennyy via DepositPhotos

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Common Name: Triclopyr- 60.45%

Formulation: Oil-soluble liquid, ester

Signal Word: Caution

Toxicity: Slightly toxic; oral LD50: 3200 mg/kg

Use Classification: General Use

Minimum Required Personal Protective Equipment: Long-sleeved shirt, long pants, shoes, socks, and chemical-resistant gloves

Carriers: Water for foliar applications; for basal bark and cut stump treatment use commercially available basal oil, diesel fuel, fuel oil, or kerosene

Activity: Absorbed through foliage, bark, or cut surface

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

Selectivity: Little or no impact on grasses

Precautions:Do not apply directly to open water, toxic to fish.

Application Methods: Foliar spray, basal bark, cut stump

Manufacturer: Corteva Agriscience

Agenda

Authors

David R. Jackson

Former Extension Educator, Renewable Natural Resources

Pennsylvania State University