Trunk injection
Trunk injection of plane trees on central Isfahan avenues
Sucking-pest control on 1,200 plane trees with not one drop sprayed in a public space.
- Trees treated
- 1,200
- Spraying used
- 0 L
- Time to effect
- 3 wk
- Year
- 2024
Challenge
Plane trees on high-traffic routes were heavily infested with a sucking pest, but spraying a street with pedestrians and open-air cafés was simply not workable. At over 15 metres tall, full canopy coverage by sprayer was impossible anyway.
Solution
The entire route was covered by trunk injection. Work ran during low-traffic morning hours without closing the street. Dose was calculated per tree from trunk diameter and logged, so each tree's history remains traceable in later years.
Results
Pest populations fell below the damage threshold within three weeks and stayed there for the rest of the growing season. No citizen complaints relating to spraying were recorded.
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