Resumen

CARRERA-SANCHEZ, Karina María Elena; SUNTASIG-NEGRETE, Edison Roberto; MANOBANDA-PINTO, Paul Marcelo  y  DOMINGUEZ-BRITO, Javier. Cultural, morphological and physiological characterization of Fusarium spp. in pitahaya, Palora, Ecuador. Agroecología Global [online]. 2025, vol.7, n.12, pp.73-95.  Epub 13-Abr-2025. ISSN 2665-0290.  https://doi.org/10.35381/a.g.v7i12.4442.

The objective of this work was to determine the cultural, morphological and physiological in vitro characterization of Fusarium spp. the causal agent of vascular wilt of yellow pitahaya (Hylocereus spp) in the Amazon region of Ecuador. Roots were collected from 8 farms in the Palora canton. Isolations were evaluated and identified by cultural, morphological and physiological characterization. Semi-solid culture media (PDA and CLA) and PDB liquid culture media were used for the tests. The radial growth rate was 2.8 mmxday-1 of the isolates, regardless of their origin. No significant differences were found in the cultural characterization in terms of colony border and texture among the isolates. Variations were detected in their coloration, with red, pale red, yellowish red to light pink colors. No significant differences were observed in the size of microconidia, macroconidia and conidiophores, determining that pH 7 is the optimum for Fusarium spp. Development.

Palabras clave : Fusarium; characterization; yellow dragon fruit; Ecuador.

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