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Biological effects of Bacillus thuringiensis on the egg parasitoid, Trichogramma evanescens

Published online by Cambridge University Press:  08 April 2017

H. S. Salama  and
F. N. Zaki
H. S. Salama
Affiliation:
Laboratory of Pests and Plant Protection, National Research Centre, Dokki, Cairo, Egypt
F. N. Zaki
Affiliation:
Laboratory of Pests and Plant Protection, National Research Centre, Dokki, Cairo, Egypt
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Abstract

Feeding of the adult parasite of Trichogramma evanescens Westwood on a honey solution containing 500 μg 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.

Résumé

Nourriture de l'adulte de la parasite Trichagramma evanescens avec solution du miel et 500 μg 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 meme concentration, une baisse significative a été observer dans le pourcentage de la parasitation. Aucun mauvais effect a été observer sur le developpement des jeunes stades de la parasite et le pourcentage de l'eclosion quand on traite les oeufs des hots avant ou après la parasitation.

Keywords

Bacillus thuringiensisparasitoidTrichogramma evanescensSpodoptera littoralisAnagasta kuehniella
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 6 , Issue 2 , April 1985 , pp. 145 - 148
Copyright
Copyright © ICIPE 1985

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