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.

Lilac plants normally bloom in the spring. But, stressful conditions can cause them to bloom in the late summer/fall. A...
09/10/2026

Lilac plants normally bloom in the spring. But, stressful conditions can cause them to bloom in the late summer/fall. Also, it's only blooming on the east facing side of the plant.

I was manually removing squash vine borer larvae, and was surprised by this critter!
09/07/2026

I was manually removing squash vine borer larvae, and was surprised by this critter!

Tarantula hawk in action!
09/05/2026

Tarantula hawk in action!

This is one way to mow around watermelon vines that creep across the lawn!
09/03/2026

This is one way to mow around watermelon vines that creep across the lawn!

Insects are amazing! Check out this tiny, jug-shaped mud nest on my squash plant. It was made by a potter wasp, a solit...
09/01/2026

Insects are amazing! Check out this tiny, jug-shaped mud nest on my squash plant. It was made by a potter wasp, a solitary, beneficial insect.

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.

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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