Saving South Africa’s Urban Trees from PSHB — and turning preservation into verified carbon impact.
Forest Keepers deploys systemic tree injection to stop the Polyphagous Shot Hole Borer (PSHB) and Fusarium dieback, preserve mature canopy carbon, and generate high-integrity domestic carbon offsets.
Why this matters now
Pilot focus: Johannesburg + Pretoria/Tshwane with rapid metro expansion.
The Threat
PSHB is an invasive ambrosia beetle that carries Fusarium into xylem tissue, causing systemic dieback. Without intervention, mature urban trees die over 2–9 years depending on host species.
Primary driver
Reproductive hosts fuel rapid spread across metros.
- Wide host range across SA cities
- High mortality on plane trees and oaks
Avoidable emissions
Tree death releases stored CO₂e and stops future uptake.
- Immediate avoided-emissions opportunity
- Long-term sink preservation
Urban resilience
Preserving canopy cools cities and protects biodiversity.
- Heat-island reduction
- Public health improvement
Our Solution in One Line
We combine systemic insecticide and fungicide via controlled vascular injection, stopping PSHB and Fusarium inside the tree while avoiding the runoff and ecological risk of soil drenches.
See the methodPartner with Forest Keepers
We offer carbon buyers a scalable domestic pipeline and the chance to lead a national nature-based solution.