Effects of treatment with diatomaceous earth on numbers of ectoparasites in nests of tree swallows Tachycineta bicolor near Prince George, British Columbia, Canada

  • Published source details Dawson R.D. (2004) Efficacy of diatomaceous earth at reducing populations of nest-dwelling ectoparasites in tree swallows. Journal of Field Ornithology, 75, 232-238


This study is summarised as evidence for the following.

Action Category

Remove ectoparasites from nests to increase survival or reproductive success

Action Link
Bird Conservation
  1. Remove ectoparasites from nests to increase survival or reproductive success

    A randomised, replicated and controlled trial over two breeding seasons in 2001-2 in British Columbia, Canada (Dawson 2004) found that tree swallow Tachycineta bicolor nests treated with insecticide (in 2001: 38.1% diatomaceous earth, 0.2% pyrethrins and 1.0% piperonyl butoxide; 2002: 80% silicon dioxide) contained significantly fewer bird fleas Ceratophyllus idius and blow flies Protocalliphora spp. than untreated nests (approximately 25 fleas and 28 blowflies in 23 treated nests vs. 350 fleas and 50 blowflies in 32 control nests).


Output references

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