Autores/as
Resumen
Evaluar el efecto letal y subletal de los acaricidas abamectina y dimetoato al depredador P. macropilis y su presa T. urticae. Alcance: Efecto letal y subletal de los acaricidas a P. macropilis y T. urticae. Metodología: Se determinó en experimentos de laboratorio el efecto letal y subletal de los acaricidas abamectina y dimetoato al depredador P. macropilis y su presa T. urticae. Principales resultados: T. urticae fue 2.6 veces y 4.2 veces más tolerante que P. macropilis a la abamectina y al dimetoato, respectivamente. La tasa instantánea de crecimiento poblacional de la presa y el depredador disminuyó linealmente con el aumento de las concentraciones de ambos acaricidas. Sin embargo, la tasa instantánea de crecimiento poblacional del depredador disminuyó más rápidamente que la de la plaga, lo que resultó en la extinción de las poblaciones del depredador, mientras que la población de plagas persistió. Conclusiones: Los agricultores pueden lograr un mejor control de la plaga no aplicando acaricidas, sino manejando las poblaciones de este depredador en el campo utilizando técnicas naturales de conservación del enemigo.
Palabras clave:
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