Effect of two bio-pesticides (Thevetia peruviana K. and ricinus communis L.) on the emergence of Spodoptera frugiperda, SMITH 1797 (Lepidoptera, Noctuidae) in maize cultivation (zea mays) in Daloa (Center-West, Côte d’Ivoire)

 Drissa FONDIO*, Lacina SORO,  Robert Ossey N’DEPO, Lucie N’Guessan YEBOUE et Celestin Abedi Kouadio N’GORAN

UFR Agroforesterie, Université Jean Lorougnon Guédé, BP 150 Daloa, Côte d’Ivoire.

*Auteur correspondant ; E-mail : fondiodrissa35@gmail.com ; Tel. : +225 0749359360

RÉSUMÉ

Le maïs (Zea mays, L.) est une céréale  de la famille des Poaceae. Sa culture fait l’objet de nombreuses attaques causant des pertes importantes de la production. Cette étude  s’inscrit dans les études préliminaires de recherche de nouvelles perspectives de lutte contre Spodoptera frugiperda sur une parcelle de maïs, l’un des ravageurs le plus vorace en vue de proposer un moyen de lutte alternative. Pour la réalisation des travaux, une parcelle paysanne a été utilisée. Dans le but de contrôler la population de S. frugiperda sans dégrader l’environnement, l’utilisation des extraits de plantes comme produits de substitution aux insecticides chimiques a été envisagée. Ce sont, Ricinus communis et Thevetia peruviana. Les travaux ont montré que les extraits de   R. communis sont  efficaces sur les larves à la concentration de 110g/L. Cette étude a révélé que les S. frugiperda est l’insecte qui cause le plus de dégâts au maïs et pour lutter contre, lui les extraits de R. communis sont les plus efficaces.                                                                                                   

 Mots-clés: Maïs, Insectes, Ravageur, Extraits, Insecticides.

 

ABSTRACT    

Maize (Zea mays, L.) is a cereal from the Poaceae family. Its culture is the subject of numerous attacks causing significant losses in production. This study is part of the preliminary research studies of new prospects for the control of Spodoptera frugiperda on a plot of maize, one of the most voracious pests, with a view to proposing an alternative means of control. For the realization of the works, a peasant plot was used. In order to control the population of S. frugiperda without degrading the environment, the use of plant extracts as substitutes for chemical insecticides has been considered. These are, Ricinus communis and Thevetia peruviana. Work has shown that extracts of R. communis are effective on larvae at a concentration of 110g/L. This study revealed that S. frugiperda is the insect that causes the most damage to maize and to fight against it, extracts of R. communis are the most effective.

Keywords: Maize, Insects, Pest, Extracts, Insecticides.

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