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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.
Video transcript
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 MOISTURE.
Submit plant samples online through DDDi