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Important pest species of the Spodoptera complex: Biology, thermal requirements and ecological zoning

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Abstract

In South America, especially in Brazil, four members of the Spodoptera complex, Spodoptera albula (Walker, 1857), S. cosmioides (Walker, 1858), S. eridania (Stoll, 1782), and S. frugiperda (J.E. Smith, 1797) are important pests of many crops, in particular corn, soybean and cotton crops. Spodoptera eridania and S. frugiperda have recently invaded Africa and caused serious crop damage, and S. frugiperda has invaded Asia and Oceania. The present study tested the effect of a range of seven temperatures (18–34 °C) on these four Spodoptera species simultaneously, assessing several biological variables. Based on the thermal tolerances obtained experimentally, the ecological zoning of each species in Brazil was mapped and compared spatially, according to the crop calendar of three important crops in different regions (first and second corn harvest, soybean and cotton). Our results showed that S. eridania had the lowest temperature threshold (Tt), i.e., it is favored in regions with more moderate temperatures; and did not tolerate the warmest temperature, failing to complete its development at 34 °C. In contrast, S. albula did not complete its development at 18 °C and may be more successful in warmer regions. In general, S. frugiperda and S. cosmioides were able to develop over a wide range of temperatures, and S. frugiperda showed a higher biological potential at all temperatures evaluated. Our biological data and the computational code are available online. The extensive data produced here can help other entomologists to delimit the spatial distribution of the Spodoptera complex and forecast outbreaks of these pests.

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Data availability

All datasets, R code, are made available as online supplementary materials, and software (algorithm) is available at 10.5281/zenodo.4594884.

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Acknowledgements

We would like to thank Neide Graciano Maria from USP/ESALQ for helping with rearing the Spodoptera species. We are grateful to the companies PROMIP and Biopartner for supplying us with the different species of Spodoptera. We also thank Janet Reid, JWR Associates, for revising and improving the English version of this article. AGG holds a fellowship awarded by FAPESP (19/26071-8).

Funding

São Paulo Research Foundation (FAPESP) (Process 2018/02317–5) as part of the São Paulo Advanced Research Center for Biological Control (SPARCBIO) hosted at the Luiz de Queiroz College of Agriculture (ESALQ) of the University of São Paulo (USP), sponsored by FAPESP, Koppert and USP. National Institute of Science and Technology Semiochemicals in Agriculture (INCT) (FAPESP 2014/50871–0/CNPq 465511/2014–7). Center for Agriculture and Bioscience International (CABI) project IC10001B—Invasive Best Practice Solutions (DGIS). CABI gratefully acknowledges the core financial support from CABI member countries (and lead agencies). See at https://www.cabi.org/about-cabi/who-we-work-with/key-donors/for full details.

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Correspondence to Aloisio Coelho Jr.

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The authors declare no competing interests.

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All applicable international, national and/or institutional guidelines for the care and use of animals were followed. This article does not contain any studies with human participants performed by any of the authors.

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Communicated by Antonio Biondi .

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Parra, J.R.P., Coelho, A., Cuervo-Rugno, J.B. et al. Important pest species of the Spodoptera complex: Biology, thermal requirements and ecological zoning. J Pest Sci 95, 169–186 (2022). https://doi.org/10.1007/s10340-021-01365-4

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  • DOI: https://doi.org/10.1007/s10340-021-01365-4

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