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You are here: Home / Microbes / Species Profiles / Late Blight
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Species Profiles

Late Blight

Late blight symptoms on Tomato - Invasive.org

Scientific name: Phytophthora infestans (Montagne) Bary

Synonym: Peronospora infestans Montagne

Common names: Late blight, late blight disease, potato late blight, tomato late blight

Click image to enlarge

Potato Late Blight Still a Threat to Global Food Security (Dec 28, 2012)
The James Hutton Institute (United Kingdom).
A study by scientists has warned the organism responsible for the Irish potato famine is still a major threat. The team said the results showed the need for strategies to protect potatoes from disease. Phytophtora infestans is a fungus like organism that causes late blight in potatoes. It infects leaves, stems and tubers and can cause devastating crop losses.

Late Blight - USAblight (cooperative effort; funded by USDA-NIFA)
USAblight.
A national project on Late Blight of Tomatoes and Potato in the U.S. This site will act 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.

Native To: Possibly Mexico (Fry and Goodwin 1997)

Date of U.S. Introduction: First appeared in the U.S. in the 1840s; new agressive strains of the disease were discovered in the 1990s (Fry and Goodwin 1997)

Images: Invasive.org and Google

Video: Pennsylvania State University Outreach - What You Need to Know (or click Play button below)

Means of Introduction: Possibly introduced through infected tomatoes imported from Mexico (Fry and Goodwin 1997)

Impact: Disease of potatoes and tomatoes (Fry and Goodwin 1997)

Current U.S. Distribution: Occurs throughout the U.S.

Management Plans: Microbes / Late Blight

Selected Internet Resources:

Federal Government

Phytophthora infestans
Integrated Taxonomic Information System.
Taxonomy

Potato Late Blight in Developing Countries (PDF | 123 KB)
United States Agency International Development.
Impacts; Habitat; Distribution; Dispersion; Controls

Potatoes, Once Again, Under Fungal Attack (May 1997)
USDA. Agricultural Research Service.
Photographs; Impacts; Controls

Phytophthora infestans Article Citation Search - AGRICOLA Database
USDA. National Agricultural Library.
Research; Special Note: NAL Catalog Search (resources)

Late Blight - USAblight (cooperative effort; funded by USDA-NIFA)
USAblight.
Identification/Description; Impacts; Distribution; Controls

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State Government

Late Blight of Tomato and Potato in Connecticut -- 2011 (May 2011; PDF | 819 KB)
Connecticut Agricultural Experiment Station. Department of Plant Pathology and Ecology.
Identification/Description; Photographs; Introduction History; Impacts; Controls

Late Blight Identification - Potato IPM Program
Maine Government.
Identification/Description; Photographs

Pest Alert: Late Blight of tomato and potato (PDF | 610 KB)
Wisconsin Department of Agriculture, Trade, and Consumer Protection.
Identification/Description; Photographs; Introduction History; Impacts; Controls

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University/Academic

Late Blight Disease of Potato and Tomato in Alaska (Apr 2006; PDF | 223 KB)
University of Alaska - Fairbanks. Cooperative Extension Service.
Identification/Description; Introduction History; Impacts; Habitat; Distribution; Controls

Potato Late Blight - UC Pest Management Guidelines (May 2008)
University of California. Statewide Integrated Pest Management Program.
Identification/Description; Photographs; Habitat; Controls

Late Blight of Potatoes and Tomatoes - Vegetable MD Online (Jul 1998)
Cornell University. Department of Plant Pathology.
Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls

Phytophthora infestans - Crop Knowledge Master
University of Hawaii. College of Tropical Agriculture and Human Resources; Hawaii Department of Agriculture.
Taxonomy; Identification/Description; Life Cycle; Habitat; Distribution; Controls

Late Blight of Tomato (Phytophthora infestans) (Aug 2008; PDF | 593 KB)
University of Hawaii. Cooperative Extension Service.
Taxonomy; Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Distribution; Controls

Late Blight and Tomato Transplant Production
University of Massachusetts Amherst. Extension.
Identification/Description; Photographs; Introduction History; Dispersion; Controls

Michigan Potato Diseases: Late Blight Risk Monitoring
Michigan State University.
Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Controls

Potato Late Blight Alert for the Midwest (Jun 2009)
Michigan State University. Integrated Pest Management Program.
Identification/Description; Photographs; Illustrations; Life Cycle; Habitat; Controls

Late Blight: A Plant Disease That Impacts the Community (PDF | 180 KB)
North Dakota State University. Agriculture and University Extension.
Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Dispersion; Controls

Potato (Solanum tuberosum) Late Blight - Online Guide to Plant Disease Control
Oregon State University. Extension Service.
Identification/Description; Photographs; Introduction History; Life Cycle; Distribution; Controls

Late Blight of Tomato - High Plains IPM Guide (Apr 2007; PDF | 31 KB)
University of Wyoming; University of Nebraska; Colorado State University; Montana State University.
Identification/Description; Dispersion; Controls

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International

Phytophthora infestans - Invasive Species Compendium
Centre for Agricultural Bioscience International (CABI).
Taxonomy; Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Distribution; Controls

Global Initiative on Late Blight
Consultative Group on International Agricultural Research.
Taxonomy; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Controls; Special Note: Bibliographic Database

The Microbial World: Potato blight - Phytophthora infestans
University of Edinburgh (United Kingdom). Institute of Cell and Molecular Biology.
Photographs; Illustrations; Life Cycle; Habitat; Dispersion; Controls

Phytophthora infestans - Potato late blight
Federal Ministry of Education and Research (Germany). GMO Safety.
Identification/Description; Photographs; Impacts; Controls

Combating Light Blight
International Potato Center.
Introduction History; Impacts; Controls

Late Blight in Potatoes
Manitoba Agriculture, Food and Rural Initiatives (Canada).
Identification/Description; Photographs; Habitat; Dispersion; Controls

Late blight
PAN Germany. Online Information Service for Non-Chemical Pest Management in the Tropics.
Identification/Description; Photographs; Habitat; Controls

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Organizations

Late Blight of Potato and Tomato
American Phytopathological Society.
Identification/Description; Photographs; Illustrations; Impacts; Life Cycle; Controls

Re-emergence of Potato and Tomato Late Blight in the United States (Dec 1997)
American Phytopathological Society.
Taxonomy; Photographs; Introduction History; Impacts; Distribution; Dispersion; Controls

Special Report - Potato Late Blight in the Columbia Basin: An Economic Analysis of the 1995 Epidemic (Jan 1997; PDF | 47 KB)
American Phytopathological Society.
Impacts

Implications for a warmer, wetter world on the late blight pathogen: How CIP efforts can reduce risk for low-input potato farmers (PDF | 1.48 MB)
International Potato Center.
Impacts; Distribution; Controls

Seed Borne Late Blight of Potato (2002)
Plant Management Network. Plant Health Progress.
Photographs; Habitat; Dispersion; Controls

Organic Alternatives for Late Blight Control in Potatoes (Mar 2004; PDF | 509 KB)
National Center for Appropriate Technology. National Sustainable Agriculture Information Service.
Photographs; Impacts; Life Cycle; Habitat; Controls

Citations

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.

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Last Modified: Mar 22, 2014
 
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