Bio-efficacy of entomopathogenic fungi and vegetable oils against the pink pineapple mealybug: Dysmicoccus brevipes (Cockerell)
Journal Title: Revista de la Facultad de Ciencias Agrarias. Universidad Nacional de Cuyo - Year 2024, Vol 56, Issue 1
Abstract
Dismiccoccus brevipes (Cockerell) (Hemiptera: Pseudococcidae) es una de las plagas de mayor importancia de la piña a nivel mundial, no solo por los daños directos que ocasiona, si no por ser trasmisor del virus marchitez roja de la piña. Los hongos entomopatógenos son una alternativa para el manejo de este insecto. En un experimento preliminar se evaluó la patogenicidad y virulencia de dos aislamientos de Beauveria bassiana (BbCT, BbCa) y uno de Metarhizium anisopliae (Ma), sobre la mortalidad de hembras adultas de D. brevipes. Posteriormente, los aislamientos más virulentos y una cepa comercial de Paecelomyces fumosoroceus (PAE-SIN), fueron evaluados en otro experimento en condiciones de laboratorio e invernadero, solos o en combinación con aceite de soya y aceite de neem. Todos los aislamientos evaluados presentan diferente grado de patogenicidad; sin embargo, B. bassiana resultó ser el más patogénico. El aislamiento BbCa a una concentración inicial de 1×107 conidios mL-1 fue más efectivo contra adultos de D. brevipes comparado al control, causando mortalidad del 66% ± 6% a los 8 días pos inoculación a 26 ± 1°C. BbCa presentó la mayor virulencia con una CL50, de 3.45x107 conidios mL-1 y una CL95 de 2.29x108 conidios mL-1, bajo condiciones controladas. Sin embargo, la eficacia se incrementó para BbCa, cuando se combinó con aceite de neem, al causar el 100 % de mortalidad a los 6 días pos inoculación.
Authors and Affiliations
Omara Pérez Panti, Rubén García de la Cruz, Héctor González Hernández, Saúl Sánchez Soto, Pedro Antonio Moscoso Ramírez, Francisco Izquierdo Reyes
Keywords
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- EP ID EP764358
- DOI https://doi.org/10.48162/rev.39.125
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