Journal
SCIENTIA AGROPECUARIA
Volume 13, Issue 1, Pages 43-52Publisher
UNIV NACL TRUJILLO, FAC CIENCIAS AGROPECUARIAS
DOI: 10.17268/sci.agropecu.2022.004
Keywords
Theobromo cacao L.; Lethal wilt; black beetle; phytopathogen transmission; semiochemicals
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This review focuses on the interaction between the lethal wilt disease and beetle borers in cocoa trees, particularly the insect that transmits the disease and the potential vector species. It emphasizes the need for further identification and differentiation of Ceratocystis species, a deeper understanding of the ecology of the borer beetle, and research on the interaction between C. cacaofunesto and host response, as well as the chemical ecology of the fungus-vector-tree system.
Cocoa (Theobromo cacao L.) is one of the main crops in Latin American and African countries, its almonds being marketed to produce chocolate. However, different biotic factors can negatively affect the crop production, especially on small farms where management by farmers is scarce or nonexistent. Lethal wilt (Cerotocystis cacaofunesto Engelbrecht & Harrington) together with beetle borers (Coleoptera: Curculionidae: Scolytinae), continue to be the main problems affecting cocoa. It has been observed that both organisms interact intrinsically inside the trunks of cacao trees. Despite the importance of this interaction, in general, the countless research and review articles carried out to date have focused mainly on studying each biotic factor separately or have been addressed in a general way. Thus, in this review we mainly focus on the interaction between the Lethal wilt and the borer beetles, especially how and which is the insect that transmits the disease in cocoa plants. Additionally, an exhaustive characterization of Xyleborus ferrugineus as a possible vector of C. cacaofunesto in cacao trees has been made. From this review, we can say that Ceratocystis species still need to be fully identified and differentiated, a deeper understanding of the ecology of the scolithid X. ferrugineus, to study the interaction between C. cacaofunesto and vectors from the host response and generate new studies, and the chemical ecology of the fungus-vector-tree still needs to be understood.
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