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Black Rot of Sweetpotato: A Comprehensive Diagnostic Guide

M. N. Stahr and L. M. Quesada-Ocampo

November 2019

Diagnostic Guide

Black rot of sweetpotato (Ipomoea batatas) has been considered one of the most historically devastating diseases of the crop. The pathogen, Ceratocystis fimbriata (Ellis and Halst), is able to infect a variety of hosts including morning glory (Ipomoea sp.), coffee (Coffea sp.), and mango (Mangifera indica) over a wide geographic range. The slow-growing nature of the pathogen can lead to difficulty in isolating and maintaining cultures of the fungus. Thus, the objective for this diagnostic guide is to provide information about effective techniques for pathogen isolation, identification, storage, and pathogenicity testing as well as describe the host and geographic range, taxonomy, and disease in sweetpotato.


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