Abstract
The diamondback moth, Plutella xylostella (L.), is a cosmopolitan pest of brassicaceous crops occurring in regions with highly distinct climate conditions. Several studies have investigated the relationship between temperature and P. xylostella development rate, providing degree-day models for populations from different geographical regions. However, there are no data available to date to demonstrate the suitability of such models to make reliable projections on the development time for this species in field conditions. In the present study, 19 models available in the literature were tested regarding their ability to accurately predict the development time of two cohorts of P. xylostella under field conditions. Only 11 out of the 19 models tested accurately predicted the development time for the first cohort of P. xylostella, but only seven for the second cohort. Five models correctly predicted the development time for both cohorts evaluated. Our data demonstrate that the accuracy of the models available for P. xylostella varies widely and therefore should be used with caution for pest management purposes.
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The authors are grateful to the Brazilian National Research Council (CNPq) and Brazilian Federal Agency for Support and Evaluation of Graduate Education (CAPES) for the scholarships and financial support provided.
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Edited by Wesley AC Godoy – ESALQ/USP
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Marchioro, C.A., Krechemer, F.S., de Moraes, C.P. et al. Reliability of Degree-Day Models to Predict the Development Time of Plutella xylostella (L.) under Field Conditions. Neotrop Entomol 44, 574–579 (2015). https://doi.org/10.1007/s13744-015-0331-4
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DOI: https://doi.org/10.1007/s13744-015-0331-4