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October 12, 2025Environmental Entomology

Host morphs, population density, and symbiont status shape parasitism success of Aphelinus asychis (Hymenoptera: Aphelinidae) in Acyrthosiphon pisum (Hemiptera: Aphididae)

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Authors

YLYang LiSAShin‐ichi AkimotoQRQing Ru

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Overview

This study shows that host morphs and symbiont status significantly influence parasitism success in acyrthosiphon pisum, indicating critical factors in biological control.

Key Points

  • A. asychis demonstrated high parasitism performance on male aphids, significantly outpacing females in parasitoid emergence and mortality.
  • Increasing aphid density boosted parasitoid emergence initially, but competition led to plateaued efficacy at higher densities.
  • Symbiont infections negatively impacted parasitoid success, with uninfected aphids achieving the highest emergence rates.
  • Co-infection of aphids did not yield enhanced defense against parasitoids, suggesting competitive interactions limit benefits.

Cite This Study

Li et al. (2025) studied this question.

synapsesocial.com/papers/68ebabe3155248a327effca2https://doi.org/10.1093/ee/nvaf103
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