Abstract
Eared doves (Zenaida auriculata) cause significant economic damage to mature sunflower in Argentina. Empirical evidences indicate that some sunflower hybrids (e.g. confectionary and stripped oilseed) might be less susceptible to bird damage than others (e.g. black oilseed). However, these less susceptible hybrids could imply a trade-off between damage reduction and oil content on the seeds. In this work, we investigated the potential of a new oil-con hybrid types (OC: oilseed × confectionary cross) as a tool to prevent eared dove damage to sunflower crops. We compared the performance (damage values), morphological characteristics and nutritive quality of this hybrid compared to other three standard sunflower hybrids (BO: black oilseed, SO: striped oilseed, and CON: confectionary), both in the field and in cages. In both tests, doves significantly selected BO and SO hybrids over CON and OC hybrids. The OC hybrid was not selected, despite its high nutritional value. Results suggest that achene size could be an important morphological trait influenced eared dove selection of hybrids, independently of other seed characteristics. Based on these results, the OC hybrid tested in this study seems to be a promising tool for preventing eared dove damage to sunflower in Argentina.
Funding source: National Institute of Agricultural Technology http://dx.doi.org/10.13039/501100010677
Acknowledgements
Authors wish to thank Ing. Marisa Della Maddalena and ACA Company for providing oilseed × confectionary hybrids, Claudio Lorenzini for technical assistance, Yamil Arener (INTA, EEA Paraná) and Linn Marie Meyer (volunteer at INTA, EEA Paraná), for their help with the aviary tests, and Alejandra Cuatrin (INTA, EEA Paraná), for her invaluable help with statistical analyses. Finally, we thank Page Klug and George Linz for their critical review, as well as Adalía Canavelli, for her help with English writing.
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Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This work was supported by the National Institute of Agricultural Technology (INTA, Projects AERN 292241, PNCyO 1127046, RIST I226 and PNNAT 1128053), Argentina.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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