Trail edge poison oak area
Summary
Direct observation documents a Garlon 4 Ultra herbicide application on March 22, 2026 for poison oak along a trail edge in the Presidio of San Francisco.
Application Details
- Product
- Garlon 4 Ultra
- Ingredient
- Triclopyr
- Application Type
- Herbicide
- Product Source
- Listed on sign/report
- Area
- Presidio of San Francisco
- Coordinates
- 37.793329, -122.459926
Signage
- Present
- Yes
- Condition
- Sign is visible and readable in the close-up image. A second image provides wider context of the sign posted in dense vegetation.
- Placement Notes
- Posted on a yellow notice board in dense poison oak/vegetation along a trail edge.
- Transcription
- CAUTION HERBICIDE APPLICATION. The Presidio has minimized herbicide use by using Integrated Pest Management. When herbicides are used, we choose the least-toxic effective material to protect the safety of people, pets, and the environment. Date and approximate time of application: 3/22, 6A-12P. Area to be treated: Trail edge. Poison oak. Herbicide name: Garlon 4 Ultra. Active ingredient: Triclopyr. EPA identification number: 62719-527. This application will control weeds. For further questions, contact: presidio@presidiotrust.gov.
Images
Sources
No source documents are attached to this record.
Record
- Record ID
- 2026-03-22-trail-edge-poison-oak-area-garlon-4-ultra
- Date Posted
- Sep 16, 2026