Biocidal activity of three wood essential oils against Ixodes scapularis (Acari: Ixodidae), Xenopsylla cheopis (Siphonaptera: Pulicidae), and Aedes aegypti (Diptera: Culicidae)

J Econ Entomol. 2007 Apr;100(2):622-5. doi: 10.1603/0022-0493(2007)100[622:baotwe];2.


The biocidal activity of three steam distilled wood essential oils-incense cedar, Calocedrus decurrens (Torr.) Florin; Port-Orford-cedar, Chamaecyparis lawsoniana (A. Murr.) Parl.; and western juniper, Juniperus occidentalis (Hook)--were evaluated against adult Aedes aegypti (L.) (Diptera: Culicidae) and Xenopsylla cheopis (Rothchild) (Siphonaptera: Pulicidae) and nymphal Ixodes scapularis Say (Acari: Ixodidae). In vitro laboratory bioassays were conducted to establish baseline dose-mortality data through 24 h. Incense cedar heartwood was the most toxic to all three vector species followed in order of activity by western juniper and Port-Orford-cedar based on LC50 and LC90 values. Ae. aegypti were substantially more susceptible to the oils than either I. scapularis or X. cheopis.

MeSH terms

  • Aedes / drug effects*
  • Animals
  • Cupressaceae / chemistry
  • Insect Control*
  • Ixodes / drug effects*
  • Oils, Volatile / isolation & purification
  • Oils, Volatile / toxicity*
  • Plant Oils / isolation & purification
  • Plant Oils / toxicity*
  • Siphonaptera / drug effects*
  • Toxicity Tests
  • Wood / chemistry*


  • Oils, Volatile
  • Plant Oils
  • cedarwood oil