The aim of this study was to evaluate and select entomopathogenic fungi that produces insecticidal compounds for the control of adults of Anastrepha obliqua Macquart (Diptera: tephritidae) that are the main pest of mango (Mangifera indica L. Bark) in Colombia. Nine entomopathogenic fungi isolates were evaluated, five belonging to the genus Metarhizium and four belonging to the genus Beauveria. One strain of the species Metarhizium robertsii with insecticidal activity was selected. By column fractionation, an active fraction was obtained, which caused mortalities higher than 90% after 48 h of exposure. Through HPLC it was determined that the active fraction is composed of more than 22 metabolites. Identification of the metabolites by UHPLC MS/MS revealed the presence of destruxin in E, D, A and B groups (destruxin E-diol, destruxin D, destruxin D1, destruxin D2, destruxin A2, destruxin A, destruxin A3, dihydrodestruxin A, desmB, destruxin B2, destruxin B and destruxin B1). The evaluation of the insecticidal capacity of the organic fractions obtained by HPLC indicated that the extract obtained from the isolate M. robertsii had a compound with high activity on adults of A. obliqua (destruxin A) causing massive mortality of up to 100%, after 48 h of the treatment administration. Furthermore, two other compounds with medium activity were found (destruxin A2 and destruxin B), showing mortalities between 60.0 and 81.3%, respectively. The extract of the isolate MT008 of M. robertsii showed higher insecticidal activity and a potential source for the control of A. obliqua

No abstract

AGROSAVIA ha desarrollado una serie de investigaciones sobre la mosca del botón floral, considerada un insecto plaga de las pasifloras en general, dado que no solo afecta el cultivo del maracuyá (Passiflora edulis f. flavicarpa), sino también la gulupa (Passiflora edulis f.edulis) y la granadilla (Passiflora ligularis Juss). Esta publicación presenta una estrategia de manejo para este insecto plaga en el cultivo del maracuyá amarillo, como resultado de diferentes investigaciones llevadas a cabo en el departamento del Huila, relacionadas con el monitoreo y el uso de métodos de control cultural y químico, con base en umbrales de acción para su implementación.

The aim of this study was to evaluate and select entomopathogenic fungi that produces insecticidal compounds for the control of adults of Anastrepha obliqua Macquart (Diptera: tephritidae), that are the main pest of mango (Mangifera indica L. Bark) in Colombia. One strain of the species Metarhizium robertsii with insecticidal activity was selected. By column fractionation, an active fraction was obtained, this compound caused mortalities higher than 90% after 48 hours of exposure. By HPLC it was determined that the active fraction is composed of more than 22 metabolites. Identification of the extracts by UHPLC MS/MS reveal the presence of destruxin in the groups E, D, A and B (destruxin E-diol, destruxin D, destruxin D1, destruxin D2, destruxin A2, destruxin A, destruxin A3, dihydrodestruxin A, desmB, destruxin B2, destruxin B, and destruxin B1). The evaluation of the insecticidal capacity of the organic fractions obtained by HPLC indicated that the extract obtained from the isolate Metarhizium robertsii had a compound with high activity on adults of A. obliqua (destruxin A) causing massive mortality of up to 100%, 48 hours after treatment administration. Furthermore, two other compounds with medium activity were found (destruxin A2 and destruxin B), showing mortalities between 60.0 and 81.3% respectively. The extract of the isolate MT008 of M. robertsii showed higher insecticidal activity and is a potential source for the control of A. obliqua.

Esta guía está dirigida especialmente a los productores del Suroeste antioqueño para la producción de hierbabuena (Mentha spicata L.) y muestra el paso a paso de los aspectos a tener en cuenta para su producción en campo, cosecha, poscosecha y agroindustria, a partir de un lenguaje sencillo e ilustrado con imágenes de las fincas donde se llevaron a cabo las diferentes actividades y capacitaciones.