Volume 81, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


BioUD is an arthropod repellent that contains the active ingredient 2-undecanone originally derived from wild tomato plants. Repellency of BioUD was compared with five commercially available arthropod repellents against the ticks (L.) and Say in two-choice bioassays on treated versus untreated cotton cheesecloth. Overall mean percentage repellency against both species was greatest for and did not differ significantly between BioUD (7.75% 2-undecanone) and products containing 98.1% DEET, 19.6% IR3535, and 30% oil of lemon eucalyptus. Products containing 5% and 15% Picaridin and 0.5% permethrin were also repellent compared with untreated controls but to a lesser degree than BioUD. The four most active repellents at the same concentrations used before were directly compared in head-to-head bioassays on cotton cheesecloth. BioUD provided significantly greater overall mean percentage repellency than IR3535 for and . BioUD was significantly more repellent than oil of lemon eucalyptus for but did not differ significantly in repellency against . No statistically significant difference in overall mean percentage repellency was found between BioUD and DEET for or . In a 7-week time course bioassay, BioUD applied to cotton cheesecloth and held at room temperature provided 5 weeks of > 90% repellency against .


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  • Received : 02 Mar 2009
  • Accepted : 12 Jul 2009

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