en گياهان دارویی Medicinal Plants پژوهشی Research <div style="text-align: justify;"><b><span lang="EN" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times=""><span style="letter-spacing:-.2pt">Background:</span></span></span></b> <span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">Botanically derived compounds are increasingly recognized as potential alternatives to synthetic insecticides due to their bioactive properties against insect pests. </span></span><b><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">Objective:</span></span></b> <span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">This study investigated t</span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">he chemical composition<b> </b>and insecticidal activity of essential oil vapors</span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times=""> obtained</span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times=""> from <i>Satureja hortensis</i> L. (Lamiales: Lamiaceae), <i>Nepeta crispa</i> Willd (Lamiales: Lamiaceae), and <i>Anethum graveolens</i> L. (Apiales: Apiaceae) </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">against </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">larvae of <i>Plodia interpunctella</i> (Lepidoptera: Pyralidae). <b>Methods:</b> Essential oils were extracted from the aerial parts of the selected medicinal plants using Clevenger-type hydrodistillation.</span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times=""> The chemical constituents were identified by gas chromatography&ndash;mass spectrometry (GC&ndash;MS).</span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times=""> <b>Results:</b> GC-MS analysis revealed that Carvacrol (34.74), &gamma;-terpinene (34.27) and &rho;-cymene (16.96 %) were the </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">predominant compounds in </span></span><i><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">S. hortensis </span></span></i><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">oil</span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">. </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">The essential oil </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">of <i>N. crispa</i> was mainly composed of 1, 8-cineole (57.69), <i>&beta;</i>-pinene (6.53) and <i>&alpha;</i>-terpineol (4.44 %). In <i>A. graveolens,</i> the major </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">constituents were</span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times=""> L-phellandrene (34.19), Carvone (23.67), Limonene (21.47),&nbsp;<i>&alpha;</i>-terpineol (5.58), and <i>&rho;</i>-cymene (5.50 %). These plants are important for their medicinal properties. </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">Fumigant toxicity assays revealed </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">LC₅₀ values after 24 hours </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">of exposure as </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">26.974, 5.579 and 16.34 &micro;l L^-1 air for <i>S. hortensis, N. crispa</i> and <i>A. graveolens</i>, respectively. Results indicate the strong insecticidal activity of <i>N. crispa</i> against the&nbsp;</span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times=""><i>P. interpunctella</i> compared to other oils. <b>Conclusion:</b> Essential oils of these plants show capability for use in IPM programs to control stored pest populations.</span></span></div> Stored products, Insecticidal activity, Indian meal moth, Satureja hortensis, Nepeta crispa, Anethum graveolens 97 107 http://jmp.ir/browse.php?a_code=A-10-7160-1&slc_lang=en&sid=1 Roghayeh Najafzadeh r.najafzadeh@urmia.ac.ir 100319475328460049516 100319475328460049516 No Department of Medicinal Plants, Shahid Bakeri High Education Center of Miandoab, Urmia University, Urmia, Iran Roya Taghizadeh r.taghizadeh@urmia.ac.ir 100319475328460049517 100319475328460049517 Yes Shahid Bakeri High Education Center of Miandoab, Urmia University, Urmia, Iran Somayyeh Ghasemzadeh s.gasemzadeh@yahoo.com 100319475328460049518 100319475328460049518 No Department of Plant Protection, Faculty of Agriculture, Urmia University, Urmia, Iran Shahram Mirfakhraie sh.mirfakhraie@urmia.ac.ir 100319475328460049519 100319475328460049519 No Department of Plant Protection, Faculty of Agriculture, Urmia University, Urmia, Iran