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/lp/taylor-francis/effets-de-bacillus-thuringiensis-sur-pimpla-instigator-ichneumonidae-kUiR6fZQif
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- Publisher
- Taylor & Francis
- Copyright
- © 1975 Société entomologique de France
- ISSN
- 2168-6351
- eISSN
- 0037-9271
- DOI
- 10.1080/21686351.1975.12278553
- Publisher site
- See Article on Publisher Site
Abstract
Summary G. Biache: Effects of Bacillus thuringiensis on Pimpla instigator (Ichneumonidae Pimplinae]. Studies carried out in laboratory on Bacillus thuringiensis action on Pimpla instigator F. show the determinism of sex in fonction to the pupa weight, according with Dzierzon's theory for pupa low weight. The same is not observed for pupae of heavy weight, like Pieris brassicae, where the host weight has not effect on the sex of the descendants of Pimpla female. In adults of P. instigator fed with food treated with B. thuringiensis sporescrystals we do not observe any change in the longevity, in the laying of eggs and in the fecundity. Nevertheless the addition of chemical insecticides to the food, even on low doses, cause a quick mortality. Pupae resulting from surviving caterpillars treated with B. thuringiensis spores crystals, are the host able to ensure the development of P. instigator larvae.
Journal
Annales de la Société entomologique de France (N S ) – Taylor & Francis
Published: Jul 31, 1975