What is the phosphite injection protocol for use against SOD?

There are currently two options for injections:

  • Chemjet® injectors (coil activated) – volume to be injected = 20 ml; 10% of current label dose; pressure 20 PSI (pressure of injector is already set)
  • Arborjet® injectors – volume to be injected = 40 ml; 5% of current label dose; pressure set at 35 PSI

Injections should be done every 2 years.  Every year you inject, stagger injection points 2 inches up and 2 inches sideways.
• As a rule of thumb, use one injection every 6 inches, with all injections at the same height.
• Start injections the first year as low as possible on trunk.
• Avoid injecting under branch stubs or punks.
• Injections should take 1-10 minutes to be absorbed. If they are absorbed in less than 1 minute, the material was not absorbed by vessels.  If it takes longer than 10 minutes to be absorbed, the timing was not good for the treatment.
• Good days/timing for injections are warm and breezy days between 10 am and 3 pm.
• Leave injection holes unplugged.

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