Fall armyworm, Spodoptera frugiperda (J.E. Smith) in maize cropping systems in Benin: Abundance, damage, predatory ants and potential control

Dassou Gbèblonoudo Anicet, Idohou Rodrigue, Azandémè-Hounmalon Yeyinou Ginette, Sabi-Sabi Amadou, Houndété Jacques, Silvie Pierre, Dansi Alexandre. 2021. Fall armyworm, Spodoptera frugiperda (J.E. Smith) in maize cropping systems in Benin: Abundance, damage, predatory ants and potential control. International Journal of Tropical Insect Science, 10 p.

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Abstract : Invasive fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), is a species native to the Americas which has spread to Africa in 2016. This insect has been reported in Benin as a major pest of maize causing important economic losses and putting at risk food and nutritional security. This study evaluated the damage caused by this pest to maize in different cropping system and management practices. It also assessed predatory ants presence and diversity and their potential in controlling FAW. Results showed that 50% of farmers grow maize in a mixed cropping systems in association with sorghum, cassava and cowpea and also used biopesticides. FAW larval population and damage in maize fields varied accros villages. Surprinsingly FAW larval population was higher in maize field sprayed with insecticides than untreated field. Seven species of predatory ants were recorded in maize field. Ants' population was higher in untreated field (1043 ants per hectare) than treated field (806 ants per hectare). In the laboratory, ants species exhibits great predatory potential. Further studies are needed to discuss uses of ants in FAW management in Benin.

Mots-clés Agrovoc : Ravageur des plantes, Spodoptera frugiperda, Zea mays, Système de culture, Dégât à la plante, Culture en mélange, Culture associée, Espèce envahissante, Insecte prédateur, Formicidae

Mots-clés géographiques Agrovoc : Bénin

Mots-clés libres : Maïs, Bénin, Ravageur, Pest, Prédation

Classification Agris : H10 - Pests of plants
H01 - Protection of plants - General aspects

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Auteurs et affiliations

  • Dassou Gbèblonoudo Anicet, ENSBBA (BEN) - auteur correspondant
  • Idohou Rodrigue, Université Nationale d'Agriculture (BEN)
  • Azandémè-Hounmalon Yeyinou Ginette, Université Nationale d'Agriculture (BEN)
  • Sabi-Sabi Amadou, ENSBBA (BEN)
  • Houndété Jacques, ENSBBA (BEN)
  • Silvie Pierre, CIRAD-PERSYST-UPR AIDA (FRA) ORCID: 0000-0002-3406-6230
  • Dansi Alexandre, ENSBBA (BEN)

Source : Cirad-Agritrop (

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