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New York State: 6-15-18 Agriculture Commissioner Urges Home Gardeners, Greenhouse Growers and Vegetable Farmers to Watch for and Report Late Blight. Devastating Tomato and Potato Disease Detected Early this Season. To view the full press release please see the following:

In 2016, Cornell’s Plant Disease Diagnostic Clinic identified the pathogen that causes Oak Wilt in two new locations in New York State. Go to the “Oak Wilt” link for more information.

On 12-12-17, NYSDEC announced the discovery of two new oak wilt locations in Glenville NY. Glenville was the site of the first find in New York State back in 2008. The article describes the new locations and the steps they are taking to eradicate the pathogen. The Cornell Plant Disease Diagnostic Clinic staff performed the sample testing for the NYSDEC 2017 Survey. The Glenville identifications were the only positive finds made in New York in 2017.

In 2016 the soybean cyst nematode was detected in a soybean field in New York State. Go to the “Soybean Cyst Nematode” link for more information.

"Effective August 1, 2017, a few of the clinic fees have changed. This change was needed to comply with University policies. The primary fee that may affect the majority of our clientele is a small increase of $5.00 to the standard analysis procedure. Please go to the "Fees" link to see the current fee schedule and all the services offered.”

The Plant Disease Diagnostic Clinic is a facility of the Section of Plant Pathology and Plant-Microbe Biology within the School of Integrative Plant Science at Cornell University. The Clinic provides fast and accurate plant disease diagnosis and up-to-date pest control recommendations for anyone from home owners to commercial growers. Services include analysis of plant material and soil for bacterial, fungal, viral, and nematode pathogen.


The Clinic promotes a "Test, Don't Guess" attitude. This is because we feel that knowing the pest affecting your plants and crops prior to treatment is essential for the best chances of recovery. The "Test, Don't Guess" policy allows for the appropriate selection and efficient use of control methods.

When sending a sample to the laboratory please include a Sample Submission Form. Please follow our collection tips when submitting samples! A sample that is improperly collected, packed, and/or shipped and arrives in poor shape is very difficult to diagnosis.

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Comprehensive collection of plant pest factsheets.

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