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Welcome to the PDDC home page!

Please Note!

bobty综合体育在线-In an effort to do our part to limit the person-to-person spread of COVID-19, the Cornell Plant Disease Diagnostic Clinic will not adhere to standard business hours. During this period, the PDDC staff will work remotely at times. Cornell’s buildings will be closed to the public, including the Plant Science Building. We will still accept plant samples during this time, but will do so via US Mail and express delivery services. If a discussion with the plant disease diagnostician is needed or to determine best submission options, please communicate by emailing Sandra Jensen at slj2@.

For plant disease emergencies or if you are a state regulatory official or NEPDN diagnostician, please contact Karen Snover-Clift at (607) 227-0397. Thank you for your understanding!

Questions? Contact the staff of the CU-PDDC via Email cornell-plantdiseaseclinic@, or see our sample submission instructions

For Clinic fees, 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.


bobty综合体育在线-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 diagnose.

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Upcoming Events-NEW!

Check this area for upcoming meeting information.


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Under the Scope

Weekly Diagnostic Review Reports are available here, and Feature Archives can be accessed here.

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bobty综合体育在线-Comprehensive collection of plant pest factsheets.

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Find an Expert

Have a question? Find the Cornell Cooperative Extension Office in your community.