Use of the entomopathogenic nematode Steinernema carpocapsae in combination with low-toxicity insecticides to control fall armyworm (Lepidoptera: Noctuidae) larvae

  • Diego M Viteri University of Puerto Rico, Department of Agro-environmental Sciences, Isabela, 00662, Puerto Rico, USA
  • Angela Linares University of Puerto Rico, Department of Agro-environmental Sciences, Lajas, 00667, Puerto Rico, USA
  • Luisa Flores University of Puerto Rico, Department of Agro-environmental Sciences, Lajas, 00667, Puerto Rico, USA
Keywords: dosages, efficacy, larvae mortality, Spodoptera frugiperda (J. E. Smith), synergistic effect

Abstract

Fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), has resistance to many groups of synthetic insecticides. Our objective was to evaluate the efficacy of Steinernema carpocapsae (Weiser) (Nematoda: Steinernematidae) in combination with low-toxicity insecticides at low and high dosages to control fifth-instar larvae in bioassays. The use of S. carpocapsae + chlorantraniliprole or spinetoram caused larvae mortality of over 90% at 72 h at the high dose and should be included as a least toxic strategy to control fall armyworm.

 

Sumario

El gusano cogollero [Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)] tiene resistencia a diferentes grupos de insecticidas sintéticos. El objetivo fue evaluar la eficacia de Steinernema carpocapsae (Weiser) (Nematoda: Steinernematidae) en combinación con insecticidas de baja toxicidad a dosis bajas y altas para el control de larvas de quinto estadío en bioensayos. El uso de S. carpocapsae + chlorantraniliprole o spinetoram causó un porcentaje de mortalidad de larva de más del 90% a las 72 h en la dosis alta, y debería ser incluído como una estrategia menos tóxica para el control del gusano cogollero.

 

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Author Biographies

Diego M Viteri, University of Puerto Rico, Department of Agro-environmental Sciences, Isabela, 00662, Puerto Rico, USA

Agro-environmental sciences Department

Assistant Professor

Angela Linares, University of Puerto Rico, Department of Agro-environmental Sciences, Lajas, 00667, Puerto Rico, USA

Agro-environmental sciences Department

Assistant Professor

Published
2019-04-27
Section
Scientific Notes