Isolation and field validation of a native strain of Beauveria bassiana against Hypothenemus hampei in the coffee-growing region of Atoyac de Álvarez, Guerrero, Mexico
Keywords:
Beauveria bassiana, broca café, etomopatógenos, contaminación, variedad robustaAbstract
A strain of Beauveria bassiana was isolated from Hypothenemus hampei parasitizing Coffea canephora var. robusta beans in the coffee-growing region of the municipality of Atoyac de Álvarez, Guerrero. Field validation of the strain was carried out in a plot where the presence of the fungus had not been previously reported. The fungus was applied at a concentration of 10¹¹ conidia/ml, while the control received only an adjuvant. Fungal infection of the coffee berry borer within the beans was 66.6%. This study addresses the problem of the coffee berry borer (Hypothenemus hampei), a pest that severely affects coffee production in Mexico. A native strain of the entomopathogenic fungus Beauveria bassiana was isolated from Coffea canephora var. robusta beans in Atoyac de Álvarez, Guerrero. Subsequently, its efficacy was validated in the field through applications in plots free of previous records of the fungus, using a concentration of (10^{11}) conidia/ml. The results showed a 66.6% infection rate in the coffee berry borer, with a significant increase in healthy fruit compared to the control treated only with water-based adjuvant. The use of this native strain, adapted to local agroclimatic conditions, demonstrated advantages over introduced isolates, as it persists longer in the environment and generates epizootics under favorable conditions. It is concluded that this strain represents a viable and sustainable alternative for the biological control of the coffee berry borer in the Guerrero region.
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Copyright (c) 2026 Laura Sampedro Rosas, José Villanueva Arce, José Luis Rosas Acevedo (Autor/a)
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