- Select material showing the symptoms in question. Send several
samples in different stages of the disease or disorder development.
Be generous; however, do not send totally rotten, dead, or decayed
material, or material which has been dead a long time.
- Send entire plant(s) including roots. Dig,
do not pull, plants from the ground. The roots should be
intact. Remove excess soil from the roots with gentle shaking.
Do not wet the leaves or stems. Wrap the roots so that soil
clinging to the roots will not be loose in the package.
Do not ship wet plants.
- When entire plant(s) cannot be sent (large trees or shrubs),
send a sample of the symptoms in question and a root sample,
at least one pint, including feeder roots.
- Pictures are helpful. Photographs (or digital images) should
show the whole plant in question, and closeups of the symptoms and of
the trunk and base of the plant(s).
- When only local parts of plants are affected (leaf spots, stem
cankers, or swellings), send several affected parts. Stem
and branch sections should include a short section of the
healthy tissue so that the transition area between affected and
unaffected parts is shown.
- Fruits and vegetables should be wrapped individually in dry newspaper
and shipped in a suitable box.
- Provide information concerning the sample on a
PPDC Specimen Form or in a letter. Be sure to include the
plant or crop name, any previous plants or crops at the same
location and when, description of the symptoms (when they started
and how it spread), number of plants affected, and history of
the plants(water, fertilizer, fungicide, and pesticide regimens).
- The CWEPPDC will charge a fee for its
diagnosis. Expect to receive a bill if payment is not included with
the sample.
- Ship samples to the following address.
- Under some circumstances, very specific diagnostic procedures are required
for accurate diagnosis. To review these tests and their associated fees,
click here.
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Bad - Completely alive plants |
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Bad - Completely dead plants |
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Good - Branch showing transition from living to dying parts |
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