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Arthropod-Plant Interactions

, Volume 11, Issue 6, pp 807–814 | Cite as

Examination of dogbane beetle (Chrysochus auratus) feeding and phenology on spreading dogbane, and considerations for biological control

  • Megan C. MacEachern-Balodis
  • Nathan S. Boyd
  • Scott N. White
  • G. Christopher Cutler
Original Paper
  • 120 Downloads

Abstract

We carried out experiments that considered the feeding, phenology, and biocontrol potential of dogbane beetle, Chrysochus auratus, on spreading dogbane, Apocynum androsaemifolium, a native perennial weed in lowbush blueberry (Vaccinium angustifolium). In no-choice host-feeding experiments, adult beetles did not feed upon common milkweed (Asclepias syriaca), periwinkle (Vinca minor), wild raisin (Viburnum cassenoides), and lowbush blueberry, all plants related to spreading dogbane or found around lowbush blueberry fields. In a field experiment, significant decreases in spreading dogbane total and foliar weight occurred at a density of 16 beetles per ramet, but not at lower beetle densities. In our Nova Scotia (NS) field sites, beetles were present for 8–12 weeks, beginning in late June or early July (225–335 growing degree days, GDD). Beetle abundance peaked at 4–7 beetles/m2 and occurred at 357–577 GDD, which temporally coincides with the incidence of mature spreading dogbane plants in the field. The results suggest that although inundations of C. auratus could cause significant defoliation of spreading dogbane, natural populations of the beetle probably could not satisfactorily suppress development of this weed as a stand-alone control tactic. Conservation and augmentation of C. auratus populations should nonetheless be encouraged in integrated management programs for spreading dogbane.

Keywords

Lowbush blueberry Spreading dogbane Chrysochus auratus Weed biological control Degree day models 

Notes

Acknowledgements

Financial support for this project was through a Technology Development grant from the NS Department of Agriculture in partnership with the Wild Blueberry Producers Association of NS (Grant No. DEV29-053), and through a Natural Sciences and Engineering Research Council CGS scholarship to MCM-B.

Compliance with ethical standards

Conflicts of interest

The authors have declared that no competing interests exist.

Ethical approval

This research did not involve human participants or unethical treatment of animals, and did not require informed consent.

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Copyright information

© Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  1. 1.Department of Plant, Food and Environmental Sciences, Faculty of AgricultureDalhousie UniversityTruroCanada
  2. 2.Gulf Coast Research and Education CenterUniversity of FloridaWimaumaUSA

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