The dwarf white pine has mealy bug which hide in the bark scales as well as living on the needles. It is only five feet tall so I can reach all the branches.
Will soap and water harm the waxy cuticle on the needles?
Will a dormant oil spray harm the needles? If not should this be done in late winter, early spring?
Any other ideas given that systemic insecticides are not available to homeowners in Ontario?
Update: The plant kept going downhill even after soap and water. When there was substantial foliage die back after a winter I pulled it out and found very few roots.