Copyright notice

The content on this site is in the public domain except where otherwise indicated. However, we ask that appropriate acknowledgement is given to the authors, USDA APHIS PPQ S&T Otis Lab, and USDA APHIS ITP if the information or figures from TingID are used elsewhere.

This site also includes content created by other individuals or institutions. Where this content is copyrighted, it should be properly credited, and users must seek permission from the appropriate copyright owners to use this material.

Suggested citation

Krishnankutty, S., J.L. Scher. 2020. TingID. USDA APHIS S&T Otis Lab and USDA APHIS Identification Technology Program (ITP). Otis, MA. [date of access] <>


Some of the glossary definitions were adapted from the E-Fauna BC Insect Glossary and from Froeschner 1996.

Image credits

Images on the home page were taken by the following individuals:

  • Corythucha sp.: Joseph Berger,
  • Corythucha ciliata: Fabio Sterjulc, Università di Udine,
  • Stephanitis pyri: Ferenc Spéder, Flickr
  • Stephanitis takeyai: Ab. H. Bass, Saxifraga
  • Stephanitis pyri nymphs: Ferenc Spéder, Flickr


Even though we have made every effort to provide accurate and updated information, the authors and institutions involved specifically disclaim all legal liability with respect to the accuracy, completeness, or usefulness of any information contained in TingID. The authors and the institutions involved shall assume no legal liability for any damages, including direct, indirect, consequential, compensatory, special, punitive, or incidental damages arising from or relating to the use of TingID or the information and materials provided by or linked to from TingID.

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Mention of companies or commercial products does not imply recommendation or endorsement by the USDA over others not mentioned. USDA neither guarantees nor warrants the standard of any product mentioned. Product names are mentioned solely to report factually on available data and to provide specific information. The findings and conclusions in this website have not been formally disseminated by the USDA and should not be construed to represent agency determination or policy.