Resumo

MEDINA-OSTI, Fabiola; GUTIERREZ-DIEZ, Adriana; OCHOA-ASCENCIO, Salvador  e  SANCHEZ-GONZALEZ, Enrique Ignacio. First report of pokkah boeng in sugarcane in the Huasteca Potosina. Rev. Mex. Cienc. Agríc [online]. 2022, vol.13, n.7, pp.1307-1313.  Epub 22-Nov-2022. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v13i7.2998.

Sugarcane (Saccharum officinarum) is one of the main crops produced in the world, Mexico is the sixth producer worldwide, while San Luis Potosí ranks third in production nationwide. Sugarcane plants with wilt symptoms similar to those caused by pokkah boeng disease were collected in sugarcane fields of the Huasteca Potosina. This disease known as twisted top is caused by some species of the genus Fusarium and causes economic losses due to the decrease in the quality of the harvested crop. Two isolates of fungi with morphological characteristics typical of Fusarium sp. were obtained from the stems of these plants. The identification of the isolates was carried out through the morphological characteristics of the macroconidia, microconidia and the characteristics of the colony. The molecular identification of the species was carried out by sequencing the regions of the genes ITS, β-tubulin (BT) and elongation factor (TEF). Koch’s postulates were fulfilled for the isolates obtained by inoculation in the sugarcane varieties My 55 and Mex 79-431. The morpho-molecular characterization of the isolates identified Fusarium sacchari as the causative agent of the disease. As far as is known, this is the first report of Fusarium sacchari as a causative agent of pokkah boeng disease in sugarcane in the Huasteca Potosina region.

Palavras-chave : Saccharum officinarum; Fusarium sacchari; twisted top.

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