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Agroecology: It's about time for oviposition-induced cue use
Liana O Greenberg1, Nina E Fatouros1
1Biosystematics Group, Wageningen University and Research, 6700 EH Wageningen, The Netherlands.
Current Biology : CB
|July 8, 2025
Summary
Parasitoid wasps use plant volatiles released during herbivore egg-laying for locating hosts and assessing their quality. This research offers insights into insect-plant interactions and biocontrol potential.
Area of Science:
- Chemical ecology
- Entomology
- Plant-insect interactions
Background:
- Herbivore oviposition can induce changes in plant volatile organic compounds (VOCs).
- These induced VOCs may mediate interactions between plants, herbivores, and their natural enemies.
Purpose of the Study:
- To investigate the role of herbivore oviposition-induced plant volatiles in parasitoid wasp behavior.
- To determine if parasitoids use these volatiles for host location and assessing host suitability.
Main Methods:
- Chemical analysis of plant volatiles emitted after herbivore oviposition.
- Olfactometry and Y-tube assays to measure parasitoid attraction to volatiles.
- Preference-performance assays linking volatile cues to host suitability.
Main Results:
- Parasitoid wasps demonstrated attraction to specific herbivore oviposition-induced plant volatiles.
- These volatiles were effectively used for long-distance host location.
- Volatile profiles correlated with host quality, influencing parasitoid performance.
Conclusions:
- Herbivore-induced plant volatiles serve as crucial cues for parasitoid host-finding and assessment.
- Understanding these chemical signals can lead to novel biological control strategies against pests.
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