Journal of Applied Entomology - Zeitschrift für angewandte Entomologie (1999) 123, 473-483

B. Pintureau, L. Chapelle and B. Delobel (1999)
Effects of repeated thermic and antibiotic treatments on a Trichogramma (Hym., Trichogrammatidae) symbiont
Journal of Applied Entomology - Zeitschrift für angewandte Entomologie 123 (8), 473-483
Abstract: Each individual of all populations of the thelytokous species Trichogramma cordubensis is infected by Wolbachia. Populations are composed of females, a few rare males and some intersexual or gynandromorphic individuals often capable of normal reproduction as females. Antibiotic (minocycline) and high temperature (30°C) treatments inactivate Wolbachia and induce male production. After these treatments, the sex ratio depending on the remaining frequency of thelytoky shows a genetic variability. Effect of cycles with and without treatments (minocycline or 30°C) on the thelytokous reproduction of 'individuals' (one 'individual' being one Trichogramma+n Wolbachia) was studied. The resistance of thelytokous reproduction to 30°C but not to minocycline, probably due to Wolbachia genes, increased. It is concluded that potentialities of adaptation to high temperature exist in Wolbachia and can explain a part of the spreading of these symbionts among host populations.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Bernard Christian Jacques Pintureau

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Trichogramma cordubensis (parasitoid)			France