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ARS Home » Pacific West Area » Parlier, California » San Joaquin Valley Agricultural Sciences Center » Crop Diseases, Pests and Genetics Research » Research » Publications at this Location » Publication #382003

Research Project: Breeding Prunus and Vitis Scions for Improved Fruit Quality and Durable Pest Resistance

Location: Crop Diseases, Pests and Genetics Research

Title: A diagnostic guide for Phytophthora capsici infecting vegetable crops

Author
item PARADA-ROJAS, CAMILO - North Carolina State University
item GRANKE, L.L. - Corteva Agriscience
item Naegele, Rachel
item HANSEN, Z - University Of Tennessee
item HAUSBECK, M.K. - Michigan State University
item Kousik, Chandrasekar - Shaker
item MCGRATH, M.T. - Cornell University - New York
item SMART, C. - Cornell University - New York
item QUESADA-OCAMPO, L.M. - North Carolina State University

Submitted to: Plant Disease
Publication Type: Other
Publication Acceptance Date: 4/2/2021
Publication Date: 7/23/2021
Citation: Parada-Rojas, C., Granke, L., Naegele, R.P., Hansen, Z., Hausbeck, M., Kousik, C.S., Mcgrath, M., Smart, C., Quesada-Ocampo, L. 2021. A diagnostic guide for Phytophthora capsici infecting vegetable crops. Plant Disease. Available: https://doi.org/10.1094/PHP-02-21-0027-FI.
DOI: https://doi.org/10.1094/PHP-02-21-0027-FI

Interpretive Summary: Phytophthora capsici is an oomycete pathogen causing economically important diseases in a wide range of hosts worldwide including cucurbitaceous, solanaceous, and fabaceous crops. All plant parts, crown and roots, or only the fruit may be affected depending on the host, and symptoms can range from wilting to rot and plant death. Considered a hemibiotroph, P. capsici can be cultured in artificial media and maintained in long term storage. In this diagnostic guide, we describe methods to identify P. capsici infection based on disease symptoms and pathogen signs. We also outline methods for molecular identification, pathogen isolation, storage of single-sporangium cultures, and pathogenicity testing.

Technical Abstract: Phytophthora capsici is an oomycete pathogen causing economically important diseases in a wide range of hosts worldwide including cucurbitaceous, solanaceous, and fabaceous crops. All plant parts, crown and roots, or only the fruit may be affected depending on the host, and symptoms can range from wilting to rot and plant death. Considered a hemibiotroph, P. capsici can be cultured in artificial media and maintained in long term storage. In this diagnostic guide, we describe methods to identify P. capsici infection based on disease symptoms and pathogen signs. We also outline methods for molecular identification, pathogen isolation, storage of single-sporangium cultures, and pathogenicity testing.