Extension Search / Diagnostic Labs / Oklahoma

Oklahoma State University Plant Disease and Insect Diagnostic Laboratory

The Plant Disease and Insect Diagnostic Laboratory at Oklahoma State University is Oklahoma’s university plant diagnostic lab. Send it a sick plant, an insect or a weed and it tells you what it is and what to do about it, usually for a small fee.

Lab Details

Oklahoma State University

Stillwater, Oklahoma

Disease diagnosis
Insect ID
Turfgrass
Photo diagnosis

Open the lab's site for fees, forms and the mailing address.

Services

Disease diagnosis. Finds what is making a plant sick, from fungi and bacteria to cold, drought or chemical injury.
Insect ID. Identifies insects, mites and spiders and whether they are a threat to the plant.
Turfgrass. Diagnoses lawn and turf samples.
Photo diagnosis. Looks at photos you send first, and asks for a physical sample if the photos aren't enough.

Photo diagnosis is free.
Commercial turf samples go to the lab's Turfgrass Diagnostic Laboratory.

Out of State

This lab takes samples from other states. Out-of-state fees are usually higher.

Sample Tips

Call or email the lab before you send anything. What a lab accepts, and what it charges, changes.
Send a plant that is still sick, not one that has died. Include the edge where sick tissue meets healthy tissue.
Bag the roots and soil and tie the bag off at the stem, so soil stays off the leaves. Wrap leaves in dry paper and don’t add water.
Mail early in the week so the box doesn’t sit in a warehouse over the weekend.
Fill in the lab’s form completely: the plant, what you see, when it started and what has been sprayed or applied.

Not sure it’s worth a lab fee? The plant health key narrows a problem down from what you see, and your county Oklahoma Extension office can often look at a sample free first.

Other Labs

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