Contributors: K.R. Barker, Plant Pathologist;
D.M. Benson, Research Plant Pathologist;
R.K. Jones, Extension Plant Pathologist
Woody Plants with Symptoms of Decline or Low Vigor (Applies to azalea,
boxwood, holly, camellia, rhododendron, blueberry, trees of all types, miscellaneous landscape
shrubs, vines, etc.)
- A generous handful of feeder roots and 1 quart of soil should be collected from plants that
have slight-to-moderate symptoms. The roots and soil should be placed together in a plastic bag
and sealed. If plant is a juniper, cedar, pine, or fruit tree,
pieces of large roots should be included (if rotted) in addition to the feeder roots. Early stage of
root rot is needed for an accurate diagnosis.
- Several branches or large twigs which show a range of symptoms should be placed in a
separate plastic bag.
- If there are known injuries, cankers, or discolorations on roots, large branches or trunk, this
should be mentioned on the form.
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Last Modified: 07/10/96