Towards better mitigation technologies for invasive wasps <i>Vespula</i> spp


  • M. Brownbridge
  • R. Toft
  • J. Rees
  • T.L. Nelson
  • C. Bunt



Exotic social insects are a major threat to New Zealands natural and agroecosystems Social wasps (Vespula vulgaris V germanica) in particular have had devastating effects in native forests and have displaced indigenous fauna through their predatory and polyphagous feeding habits High nest densities also limit access to and use of wilderness areas Insecticidal baits can reduce wasp populations for the short term on a local scale but contain potent toxins that pose environmental risks Novel baiting technologies are urgently needed by DOC and Regional Councils for use in conservation areas Baits must be palatable to Vespula spp and enable prolonged delivery of an efficacious yet selective control agent to the nest Using appropriate preservatives and humectants the field life of a protein bait was extended to 4 days without compromising its acceptance by foraging wasps Incorporation of waspactive isolates of Metarhizium anisopliae and Beauveria bassiana into the baits did not affect their attractiveness to wasps; nest traffic rates were significantly reduced by the Metarhizium treatment and infected larvae were recovered from nests exposed to each fungal treatment demonstrating the potential utility of this approach in a wasp mitigation strategy




How to Cite

Brownbridge, M., Toft, R., Rees, J., Nelson, T. and Bunt, C. 2009. Towards better mitigation technologies for invasive wasps &lt;i&gt;Vespula&lt;/i&gt; spp. New Zealand Plant Protection. 62, (Aug. 2009), 395–395. DOI:



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