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Formulation of a Locust Lotion Concentrate for Grasshopper Control

  • J. I. Olaifa
  • O. O. Orafidiya
  • O. O. Faniran
  • A. O. Adenuga
Research Article

Abstract

An emulsion concentrate (locust lotion) containing 20% v/v neem oil and 40% w/v aqueous extract of Tetrapleura tetraptera L. was found to be most stable when subjected to viscosity measurement, creaming rate determination, droplet size analysis and accelerated stability tests. The emulsion supported the growth of microorganisms which was prevented by a combination of 0.2% w/v methylparaben and 0.1% w/v propylparaben. Octylgallate, 0.1% w/v was added as an antioxidant to prevent the oxidation of neem oil in the locust lotion concentrate. The recommended use concentration for protection of cassava Manihot esculenta Crantz from damage by grasshopper Zonocerus variegatus L. was 1.8–2.2%. At 2.5%, locust lotion was phytotoxic to cassava.

Key Words

Locust lotion concentrate neem oil aqueous extract Tetrapleura tetraptera emulsion stability grasshopper control 

Résumé

Nons avons constaté qu’un concentré d’emulsion (lotion anti-criquet) contenant 20% v/v d’huile de neem et 40% w/v d’extrait équeux de Tetrapleura tetraptera L. reste très stable même lorsqu’il est soumis à des mensurations de viscosité, à la détermination du taux de crémage, à l’analyse des dimensions d’une gouttelette ainsi qu’à des tests de stabilité accélérée. l’émulsion a facilité le développement de micro-organismes, processus bloqué par une combinaison de 0,2% w/v demethylparabene et de 0.1% w/v de propylparabène. Nons avons introduit 0,1% w/v d’ocry Igallate comme anteoxydant afin d’empêcher l’oxydation de l’huile de neem dans le concentré de lotion anti-criquet. La concentration recommandée pour la protection du manioc Manihot esculenta Crantz contre des dommages causé par les crique Zonocerus variegatus L. se situe entre 1,8 et 2,2%. A 2,5% la lotion anti-criquet devient phyto-toxique un manioc.

Mots Clés

Concentré de lotion anti-criquet huile de neem extrait équeux Tetrapleura tetraptera stabilité d’èmulsion contrôle des criquets 

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Copyright information

© ICIPE 1993

Authors and Affiliations

  • J. I. Olaifa
    • 1
  • O. O. Orafidiya
    • 2
  • O. O. Faniran
    • 2
  • A. O. Adenuga
    • 1
  1. 1.Department of Plant ScienceObafemi Awolowo UniversityIle-IfeNigeria
  2. 2.Department of PharmaceuticsObafemi Awolowo UniversityIle-IfeNigeria

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