Stopping PSHB & Fusarium from the Inside

PSHB bores into xylem and inoculates Fusarium fungus. The beetle farms the fungus, which blocks vascular flow and causes dieback and death in susceptible hosts. Effective control must suppress both beetle and fungus systemically.

Why injection

Most effective pathway

  • Delivers actives directly into active xylem
  • Reaches galleries under the bark
  • Low total volume, minimal runoff/drift
  • Multi-year protection when treated early
Actives

Dual-target control

  • Systemic insecticide suppresses PSHB adults/larvae
  • Systemic fungicide suppresses Fusarium dieback
  • Precision dosing by DBH bands

High-Level SOP

  1. Inventory + DBH + GPS tagging + host priority.
  2. Stage infection (early / moderate / late).
  3. Drill 4–10 mm ports into active xylem (root flare preferred).
  4. Closed-system injection of insecticide + fungicide.
  5. Seal ports to prevent secondary infection.
  6. Monitor recovery and re-infestation; retreat on schedule.

Environmental Safeguards

Pollinators

No neonicotinoid injections during bloom on bee-attractive hosts. Winter/autumn timing preferred.

Birds & wildlife

Injection avoids surface residues, reducing secondary exposure risks.

Soil & water

Method hierarchy prioritises injection over soil drenches to prevent runoff/groundwater effects.