Biological Effects of Bacillus Thuringiensis on the Egg Parasitoid, Trichogramma Evanescens

  • H. S. Salama
  • F. N. Zaki
Research Article


Feeding of the adult parasite of Trichogramma evanescens Westwood on a honey solution containing 500 ji g of Bacillus thuringiensis var. galleriae HD-129 for 4–5 days had no effect on their longevity, productivity or their capability to parasitize the host eggs of Spodoptera littoralis (Boisdüvalle) or Anagasta kuehniella Zeller, After spraying the freshly laid host eggs with B. thuringiensis at the same concentration, a significant decrease was observed in the percentage of parasitism. No deleterious effects were observed in the development of the immature stages of the parasite and the percentage of its emergence, as affected by B. thuringiensis, when applied to the host eggs before or after parasitism.

Key Words

Bacillus thuringiensis parasitoid Trichogramma evanescens Spodoptera littoralis Anagasta kuehniella 


Nourriture de l’adulte de la parasite Trichagramma evanescens avec solution du miel et 500 p g de Bacillus thuringiensis var. galleriae HD-129 de 4–5 jours n’a pas d’effet sur la longivité, ni la production et la parasitation des oeufs des hots Spodoptera littoralis ou Anagasta kuehniella. Après avoir vaporiser les neuves oeufs par B. thuringiensis avec la même concentration, une baisse significative a été observer dans le pourcentage de la parasitation. Aucun mauvais effect a été observer sur le développement des jeunes stades de la parasite et le pourcentage de l’eclosion quand on traite les oeufs des hots avant ou après la parasitation.


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Copyright information

© ICIPE 1985

Authors and Affiliations

  • H. S. Salama
    • 1
  • F. N. Zaki
    • 1
  1. 1.Laboratory of Pests and Plant ProtectionNational Research Centre, DokkiCairoEgypt

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