Coffee Fruit Rot: The Previously Unrecognized Role of Fusarium and Its Interactions with the Coffee Berry Borer (Hypothenemus hampei)

Author:

Serrato-Diaz Luz M.1ORCID,Mariño Yobana A.2,González Joselyn de Jesús2,Goenaga Ricardo1,Bayman Paul2

Affiliation:

1. U.S. Department of Agriculture-Agricultural Research Service-Tropical Agriculture Research Station (TARS), 2200 P.A. Campos Ave., Ste. 201, Mayagüez, PR 00680-5470

2. Department of Biology, University of Puerto Rico–Río Piedras, P.O. Box 23360, San Juan, PR 00931-3360

Abstract

Coffee fruit rot (CFR) is a well-known disease worldwide, mainly caused by Colletotrichum spp., the most important species being C. kahawae subsp. kahawae. In Puerto Rico, Colletotrichum spp. were identified as pathogens of coffee fruits. The coffee berry borer (CBB) was shown to be a dispersal agent of these fungi, and interaction of Fusarium with Colletotrichum affecting coffee fruits was suggested. In this study, we demonstrated that Fusarium spp. also cause CFR in Puerto Rico. Fusarium spp. are part of the CBB mycobiota, and this insect is responsible for spreading the pathogens in coffee fields. We identified nine Fusarium spp. ( F. nirenbergiae, F. bostrycoides, F. crassum, F. hengyangense, F. solani-melongenae, F. pseudocircinatum, F. meridionale, F. concolor, and F. lateritium) belonging to six Fusarium species complexes isolated from CBBs and from rotten coffee fruits. Pathogenicity tests showed that F. bostrycoides, F. lateritium, F. nirenbergiae, F. solani-melongenae, and F. pseudocircinatum were pathogens causing CFR on green coffee fruits. F. bostrycoides was the predominant species isolated from the CBB mycobiota and coffee fruits with symptoms of CFR, suggesting a close relationship between F. bostrycoides and the CBB. To our knowledge, this is the first report of F. bostrycoides, F. solani-melongenae, F. pseudocircinatum, and F. nirenbergiae causing CFR worldwide and the first report of F. lateritium causing CFR in Puerto Rico. Understanding the CFR disease complex and how the CBB contributes to dispersing different Fusarium spp. on coffee farms is important to implement disease management practices in Puerto Rico and in other coffee-producing countries.

Funder

U.S. Department of Agriculture

National Plant Disease Recovery System

USDA-National Institute of Food and Agriculture

USDA Areawide Project on Integrated Pest Management of the CBB

Puerto Rico Science and Technology Research Trust

Publisher

Scientific Societies

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