Abstract
Leaf blight disease in coconut (LBC) caused by Lasiodiplodia theobromae leads to early defoliation and loss of bunches, which negatively impacts coconut fruit yield. The etiology of LBC in Brazil needs to be updated based on modern tools such as DNA sequencing and phylogenetic analysis. A phylogenetic tree using ITS and TEF-1α genes in combination with morphology showed L. theobromae as the most common species associated with LBC in Brazil. We identified six species from distinct plant parts (leaves, fruits, rachis, inflorescence, stem and stipe): L. brasiliense, L. pseudotheobromae, L. laeliocattleyae, Botryosphaeria fabicerciana and B. dothidea. Our pathogenicity test results revealed that B. fabicerciana and L. pseudotheobromae cause LBC symptoms. Our study is the first to address two species, in addition to L. theobromae, as etiologic agents of LBC disease based on morphological, phylogenetic and pathogenicity data.
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Santos, P.H.D., Carvalho, B.M., Aredes, F.A.S. et al. Is Lasiodiplodia theobromae the only species that causes leaf blight disease in Brazilian coconut palms?. Trop. plant pathol. 45, 434–442 (2020). https://doi.org/10.1007/s40858-020-00344-x
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DOI: https://doi.org/10.1007/s40858-020-00344-x