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Before our plant diagnosis team can accurately identify what is wrong with your plant,
they need to have a quality sample to examine. The acuracy of the disease diagnosis
is directly related to the type of plant sample submitted to our clinic. you can take
two steps to help make an accurate diagnosis.
Submit only freshly collected specimens. If possible, collect several specimens showing a
progression or range of symptoms. Keep specimens refrigerated until they are brought in for
examination. Bring samples into the Extension office during the first part of the week.
Where specific plant parts are affected (leaf spots, root rots, fruit rots, flower blights,
stem cankers), submit the affected part in as many stages of the disease as you can distinguish.
If practical, submit the whole plant. Enclose specimens in plastic bags, or in the case of ripe fruit in paper bags.
DO NOT ADD WATER OR WET PAPER TO THE BAG. Additional moisture will speed decay.
For plants showing wilting, yellowing, stunting or general decline, collect the entire plant including
the root system. Do not pull the plant out of the ground. Dig the plant carefully so as to disturb
the root system as little as possible. Shake away excess soil. DO NOT WASH SOIL FROM THE
ROOT SYSTEM. Enclose the root system in a plastic bag and seal it at the base of the plant
stem to prevent soil spillage. Then enclose the entire plant in another plastic bag and seal.
DO NOT ADD ADDITIONAL MOISTURE.
For leaf spots, submit leaves showing various stages of infection. If possible, bring in twigs or
branches with leaves still attached. Enclose leaves in a plastic bag. Individual leaves may be
placed between layers of DRY paper towels.
For lawn and turf diseases, submit a 3 to 4inch diameter plug taken where the healthy and
diseased areas meet so the sample will contain both diseased and healthy turf. Take the plug
2 to 3 inches deep and include roots and the adhering soil. Samples can be dug with a garden
trowel or small spade. Enclose sample plugs in a plastic bag. DO NOT ADD ADDITIONAL
Submit plant samples online through DDDi