Abstract
Cabbage whitefly, Aleyrodes proletella L. (Hemiptera: Aleyrodidae), causes severe damage to Brassica vegetables. This study was conducted to evaluate the seasonal population dynamics of A. proletella and its parasitoids throughout the 2016 and 2017 growing seasons in Düzce Province in Turkey. To estimate whitefly density and parasitism rates, collard leaf samples infested with whitefly were collected from fields where no pesticides were applied. Collard leaves were cultured for emergence of the adult parasitoids, which were identified as Encarsia tricolor Forster (Hymenoptera: Aphelinidae) based on morphological and molecular characteristics. Seasonal mean densities of A. proletella ranged from 11.20 to 19.30 nymphs/leaf in 2016 and from 15.19 to 86.66 nymphs/leaf in 2017. The highest parasitism rates were 6.46% and 24.79% in 2016 and 2017, respectively. Whitefly nymphs peaked in July and August during both years. The first parasitized whitefly nymphs were observed in July, and maximum parasitism rates occurred in the second half of August during both years. These findings provide significant contributions for studies involving the conservation of parasitism of A. proletella.
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The data sets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors wish to thank Dr. Maurice JANSEN (Ministry of Agriculture, Nature and Food Quality, The Hague, Netherlands) for identification of whiteflies, Dr. Andrew POLASZEK (International Institute of Entomology, The Natural History Museum, London, UK) for identification of whitefly parasitoids and Dr. Carl CHILDERS (University of Florida) for assisting with English composition of the paper. This work was undertaken as part of the author Abdurrahman Sami KOCA’s MSc research, funded by The Scientific and Technological Research Council of Turkey (TUBITAK) under Project Number 116O921 and was adapted from the resulting thesis.
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All authors performed the field experiments and counted all live whitefly individuals on the leaf samples in laboratory. ASK performed molecular identification of parasitoid wasps in the laboratory. All authors also read and approved the final manuscript.
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Koca, A.S., Kütük, H. Population dynamics of Aleyrodes proletella L. (Hemiptera: Aleyrodidae) and its parasitoids in Düzce Province of Turkey. J Plant Dis Prot 127, 607–614 (2020). https://doi.org/10.1007/s41348-020-00319-9
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DOI: https://doi.org/10.1007/s41348-020-00319-9