title: Fumigant and repellent properties of sesquiterpene-rich essential oil from Teucrium polium subsp. capitatum (L.).
abstract: OBJECTIVE
  To test fumigant and repellent properties of sesquiterpene-rich essential oil from Teucrium polium subsp. capitatum (L.).
  
  
  METHODS
  The fumigant toxicity test was performed at (27±1)°C, (65±5)% relative humidity, and under darkness condition and 24 h exposure time. The chemical composition of the isolated oils was examined by gas chromatography-mass spectrometry.
  
  
  RESULTS
  The major compounds were α-cadinol (46.2%), caryophyllene oxide (25.9%), α muurolol epi (8.1%), cadalene (3.7%) and longiverbenone (2.9%). In all cases, considerable differences in mortality of insect to essential oil vapor were observed in different concentrations and exposure times. Callosobruchus maculatus (C. maculates) (LC50=148.9 μL/L air) was more susceptible to the tested plant product than Teucrium castaneum (T. castaneum) (LC50=360.2 μL/L air) based on LC50 values. In the present investigation, the concentration of 3 μL /mL acetone showed 60% and 52% repellency against T. casteneum and C. maculatus adults, respectively.
  
  
  CONCLUSIONS
  The results suggests that sesquiterpene-rich essential oils from the tested plant could be used as a potential control agent for stored-product insects.
authors.affiliation: Department of Plant Protection, Faculty of Agriculture, University of Zabol, Zabol, Iran. Electronic address: abbkhani@yahoo.com.
authors.forename: Abbas
authors.initials: A
authors.lastname: Khani
authors.affiliation: Department of Plant Protection, Faculty of Agriculture, University of Zabol, Zabol, Iran.
authors.forename: Monireh
authors.initials: M
authors.lastname: Heydarian
keywords: Callosobruchus maculatus; Fumigant toxicit; Gas chromatography-mass spectrometry; Repellency; Terpenoids; Tribolium castaneum