Abstract

LOPEZ, Jennifer J. et al. Insecticide activity of botanical formulates on the fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae). Rev. Colomb. Entomol. [online]. 2022, vol.48, n.1, e11739.  Epub June 24, 2022. ISSN 0120-0488.  https://doi.org/10.25100/socolen.v48i1.11739.

The fall armyworm, Spodoptera frugiperda constitutes the most important pest of corn, Zea mays, and mainly synthetic chemical insecticides are used for its control. The use of botanical compounds is a potentially effective alternative for pest control. The effect of formulations of Eucalyptus globulus, Jatropha curcas, Petiveria alliacea, Ricinus communis and Ruta graveolens, (A) at concentrations of 5%, 10% and 15% (B) on mortality, food inhibition and weight of larvae of S. frugiperda was evaluated. Using second and third instar larvae, spray and choice bioassays were performed using a factorial design AxB + 3 controls [chemical insecticide (cypermethrin), commercial botanical (azadirachtin) and absolute control (water)]. Of the botanical compounds, mortality was higher when J. curcas oil (33.7%) and P. alliacea hydrolate (26.2%) were applied at. 15 mL.L-1. Larvae fed with corn leaves soaked with the three concentrations of P. alliacea and R. graveolens hydrolates showed 71-76% food inhibition, as well as the lowest weight of larvae. The results show the insecticidal activity of the botanical formulations evaluated and their potential for controlling S. frugiperda.

Keywords : Antifeedant effect; botanical insecticides; fall armyworm; hydrolates; mortality; vegetable oils.

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