Abstract
The effectiveness of natural enemies is evaluated through life table experiments and analyses of foraging behavior, including functional responses that quantify their predation capacity in relation to prey density. The age- and stage-dependent functional response and predation capacity of Nesidiocoris tenuis (Reuter) (Hemiptera: Miridae) on eggs of the tomato leaf miner Phthorimaea absoluta (Meyrick) (Lepidoptera: Gelechiidae) were evaluated under laboratory conditions using tomato leaf discs. Prey densities of 2, 4, 8, 16, 32, 64, and 128 eggs were offered to N. tenuis individuals aged 8 (nymph I), 11 (nymph II), 14 (nymph III), 16 (nymph IV), 19 (nymph V), 24 (3-day-old adult female), and 26 (5-day-old adult female) days. The functional response of 24- and 26-day-old individuals corresponded to a Type III pattern, whereas earlier developmental stages exhibited a Type II response. The longest handling time (0.70 h) was recorded for 11-day-old nymphs, while the shortest handling time (0.24 h), the highest estimated maximum predation rate (T/Th = 98.73 prey/day), and the highest mean observed maximum predation rate (89.4 prey/day) were obtained from 26-day-old adults. At the highest prey density (128 eggs), 19-, 24-, and 26-day-old individuals consumed an average of 75.33, 55.00, and 83.00 eggs per day, respectively. Overall, N. tenuis, particularly at the final nymphal and adult stages, demonstrates strong predation potential against P. absoluta eggs at higher prey densities, highlighting its value as an effective biological control agent.
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Data availability
The data that support the findings of this study are available from the corresponding author, [YF], upon reasonable request.
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Acknowledgements
The support of this research by the Department of Entomology, Tarbiat Modares University is greatly appreciated.
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This research work was supported by Tarbiat Modares University, Tehran, Iran.
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Rahil Zangiabadi: Writing – original draft, Software, Methodology, Investigation, Data curation, Conceptualization. Ali Asghar Talebi: Writing – review & editing, Validation, Resources, Methodology, Conceptualization. Yaghoub Fathipour: Writing – review & editing, Validation, Supervision, Project administration, Methodology, Funding acquisition, Data curation, Conceptualization. All authors have approved the manuscript and agree with its submission to Insects.
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Zangiabadi, R., Talebi, A.A. & Fathipour, Y. Stage-specific functional response and predation capacity of Nesidiocoris tenuis (Hemiptera: Miridae) on Phthorimaea absoluta (Lepidoptera: Gelechiidae).
Sci Rep (2026). https://doi.org/10.1038/s41598-026-49567-z
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DOI: https://doi.org/10.1038/s41598-026-49567-z
Keywords
- Functional response
- Predation rate
- Tomato leaf miner
- Handling time
- Searching efficiency
- Attack rate
Source: Ecology - nature.com

