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Predation behaviour and prey preference of two neotropical mirids against two key lepidopteran pests in tomato

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Abstract

Understanding the prey preference of polyphagous predators is important to enhance their benefits as biocontrol agents. Two predators, Macrolophus basicornis (Stål) and Engytatus varians (Distant) (both Hemiptera: Miridae), attacking eggs of the two lepidopteran pests Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) and Neoleucinodes elegantalis (Guenée) (Lepidoptera: Crambidae) were assessed under laboratory conditions. During 24 h predation rates of the two mirids were measured and their prey preference was quantified using Manly’s preference index. Behavioural patterns of each predator were observed during one hour and the following components were separated: moving, searching, resting, prey encountering, preying, feeding on leaflets and cleaning. Subsequently, encounter-, acceptance-, and predation rates were calculated. According to Manly’s preference index, E. varians had a strong preference for N. elegantalis when offered together with T. absoluta, while such a preference was not evident for M. basicornis. Compared to E. varians on T. absoluta M. basicornis spent more time searching for both prey and needed less time to encounter fresh eggs. Due to its higher attack rate, M. basicornis displayed a higher predatory efficiency on both pests. Both mirids spent longer time prey searching, resting and feeding (including sucking of leaflets) than on the remaining activities. Engytatus varians, however, spent more time feeding on plant tissue than M. basicornis. These results demonstrate the performance of both mirids as biocontrol agents against T. absoluta and N. elegantalis. Based on our results, we conclude that both mirids could be considered in pest management strategies in tomato crops.

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Acknowledgements

We thank Nazare Moura and Elaine A. Louzada Rodrigues (DEN/UFLA, Brazil) for their assistance in the collection and rearing of predator mirids. We also especially thank Dr. Paulo Rebeles (EPAMIG, Brazil) for his help and support with the specialized optic equipment for carrying out the behavioural studies, Dr. Yandy Abreu Jorge (CENSA, Cuba) for their help with R program, Dr. Juan Antonio Sánchez (IMIDA, Spain) and Dr. Jörg Romeis (Agroscope) for their helpful comments on the manuscript. Also, we sincerely thank the reviewers of the journal for their kind reception of our manuscript and for their very constructive criticism.

Funding

This project was supported by the Coordination for the Improvement of Higher Level Personnel (CAPES) (CAPES-MES project 118/11), Brazil.

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LDM, VHP and MMR designed the experiments; LDM performed the experiments; LDM, VHP, MMR and JC analyzed the data and LDM and JC wrote the paper. All authors read and approved the manuscript.

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Correspondence to Leticia Duarte Martínez.

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Martínez, L.D., de los Angeles Martínez Rivero , M., Bueno, V.H.P. et al. Predation behaviour and prey preference of two neotropical mirids against two key lepidopteran pests in tomato. Int J Trop Insect Sci 42, 815–825 (2022). https://doi.org/10.1007/s42690-021-00605-5

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  • DOI: https://doi.org/10.1007/s42690-021-00605-5

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