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Updated: Jun 13, 2026

RNA Interference in the Egg Parasitoid, Trichogramma dendrolimi Matsumura
05:29

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Published on: November 21, 2023

Decrease in fecundity induced by interspecific mating between two Trichogramma parasitoid species.

Jean-Marie Delpuech1, Carole Dupont, Roland Allemand

  • 1Laboratoire de Biométrie et Biologie Evolutive, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5558, Université de Lyon, Université Claude Bernard Lyon 1, 43 boulevard du 11 Novembre 1918, F-69622 Villeurbanne Cedex, France. delpuech@biomserv.univ-lyon1.fr

Journal of Economic Entomology
|May 1, 2010
PubMed
Summary
This summary is machine-generated.

Insecticide exposure disrupts mating specificity in Trichogramma, leading to costly interspecific mating. This significantly reduces female reproductive fitness and offspring viability, impacting biological control efforts.

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Area of Science:

  • Entomology
  • Ecology
  • Pest Management

Background:

  • Trichogramma are crucial for biological pest control.
  • Mating specificity in insects is maintained by various barriers.
  • Insecticides can interfere with pheromonal communication, reducing mating specificity.

Purpose of the Study:

  • To assess the fitness costs associated with interspecific mating in Trichogramma.
  • To understand the impact of reduced mating specificity on female reproductive success.

Main Methods:

  • Exposing Trichogramma to insecticides to observe mating behavior.
  • Analyzing the reproductive output and offspring viability after interspecific mating.
  • Evaluating the long-term effects on female fecundity.

Main Results:

  • Interspecific mating significantly reduces offspring number by over half due to egg degeneration.
  • Females produce only males after interspecific mating because fertilized eggs fail to develop.
  • Subsequent intraspecific mating does not restore female fecundity after an interspecific mating.

Conclusions:

  • Reduced mating specificity imposes a substantial fitness cost on Trichogramma females.
  • These findings are critical for sustainable development and effective biological control strategies.
  • Understanding these effects is vital for managing insect populations using Trichogramma.