USDA. APHIS. PPQ. CPHST. Identification Technology Program.
ITP and the APHIS PPQ S&T Beltsville Lab are pleased to announce the release of IDphy: Molecular and Morphological Identification of Phytopthora Based on the Types, ITP’s first pathogen tool. This website offers PPQ and its partners the most complete, valid, and up-to-date resource for identifying the culturable species of Phytophthora. IDphy includes detailed standard operating procedures for all steps involved in culturing, sequencing, and identifying suspect samples, covering both molecular and morphological methods. Some species of Phytophthora are devastating plant pathogens that have a significant impact on agriculture and natural ecosystems.
USDA. National Institute of Food and Agriculture.A national cooperative effort (funded by USDA-NIFA) on Late Blight of Tomato and Potato in the U.S. This site serves as an information portal on late blight. You can report disease occurrences, submit a sample online, observe disease occurrence maps, and sign up for text disease alerts. There are also useful links to a decision support system, and information about identification and management of the disease.
Distribution / Maps / Survey Status
The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Late Blight.
New York Invasive Species Clearinghouse.
Manitoba Agriculture, Food and Rural Development (Canada).
State and Local Government
University of California. Statewide Integrated Pest Management Program.
University of Alaska - Fairbanks. Cooperative Extension Service.
Cornell University. New York State Integrated Pest Management Program.
- Fry, W.E. and S.B. Goodwin. 1997. Re-emergence of potato and tomato late blight in the United States. Plant Disease 81(12):1349-1357.
- Integrated Taxonomic Information System. Phytophthora infestans. [Accessed Sep 10, 2014].