Plant Disease and Insect Diagnostic Laboratory-Oklahoma State University

Plant Disease and Insect Diagnostic Laboratory-Oklahoma State University We provide insect identifications and plant health diagnostics for residents of Oklahoma.

Many trees have scorched leaves. It may be due to environmental stress (heat, drought) or a bacterial plant pathogen.
08/27/2026

Many trees have scorched leaves. It may be due to environmental stress (heat, drought) or a bacterial plant pathogen.

Butter daisy (Melampodium sp.) with virus symptoms at an Oklahoma park. Saw this earlier this week.
08/19/2026

Butter daisy (Melampodium sp.) with virus symptoms at an Oklahoma park. Saw this earlier this week.

Ringspot virus or fungal leaf spot on this tall impatiens? Not sure? We can test for both.
08/14/2026

Ringspot virus or fungal leaf spot on this tall impatiens? Not sure? We can test for both.

08/11/2026

We are having trouble with our phone dropping calls. If you have a cell phone carrier other than AT&T or T-mobile, would you please give us a call? 405-744-9961. If your call does not go through, please comment with the name of your carrier.

08/10/2026

We are having trouble with our phone. If you have a cell phone carrier other than AT&T or T-mobile, would you please give us a call? 405-744-9961. If your call does not go through, please comment with the name of your carrier.

Sometimes I see claims for multi-colored peppers on one plant. Well, this is actually two pepper varieties growing clos...
08/05/2026

Sometimes I see claims for multi-colored peppers on one plant. Well, this is actually two pepper varieties growing close to each other. One matures from purple to red and the other from green to yellow. So, it appears like I have 4 different colors on the same plant!

Note the ringspots on these zinnia leaves. If you see symptoms like this, it might suggest a plant virus. We can test f...
08/03/2026

Note the ringspots on these zinnia leaves. If you see symptoms like this, it might suggest a plant virus. We can test for viruses!

Forgot to label this plant. Probably a pumpkin (with vine borer damage).
07/31/2026

Forgot to label this plant. Probably a pumpkin (with vine borer damage).

Address

127 Noble Research CTR
Stillwater, OK
74078

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

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