Rashid, Babak (2012) Insecticidal and repellency effects of essential oils of Juniperus polycarpus and Juniperus Sabina on Ephestia Kuehniella and Tribolium Confusum. Masters thesis, University of Zabol.
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Abstract
In this study, the fumigant toxicity and repellent activity of essential oil of Juniperus Polycarpus and Juniperus Sabina were investigated against two stored product insect species Tribolium Confusum and Ephestia Kuehniella at 27±1°C, 65 ± 5 %R. H under dark condition. Results showed that essential oil of J. Sabina (LC50 301.94 and LC50 23 μl/L air) was significantly more toxic than J. polycarpus (LC50 368.4 and LC50 45.13 μl/L air) for T. Confusum and E. Kuehniella, respectively. Results showed that percentage of insect mortality was increased with the concentration and the time of exposure. Essential oils of J. polycarpus at lowest concentration (166.65 and 16 μl/l air) caused 17.50% and 15% mortality after 24 h compared to 90% and 82.5% mortality at the highest concentration (444/4 and108 μl/l air) for T. Confusum and E. Kuehniella, respectively. Essential oils of J. Sabina at lowest concentration (166.65 and 8 μl/l air) caused 27.50% and 10% mortality after 24 h compared to 90 % and 100 % mortality at the highest concentration (744.37 and 56 μl/l air) for T. Confusum and E. Kuehniella, respectively. Highest repellent activity was observed for essential oil J. polycarpus against T. Confusum, whereas, J. Sabina essential oil showed maximum repellent activity against Kuehniella. GC-MS spectrometry showed that the major chemical components of the oil J. polycarpus were α-Pinene (26.97%), δ- Cadinene (5.88 %), Germacrene B (5.67 %) and Germacrene D-4-ol (4.49 %) whereas the major chemical components of the oil J. Sabina were Sabinen (11.73%), α-Pinene (11.20 %), Limonene (8.64 %), and Myristicin (8.20 %).
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Juniperus polycarpus, Juniperus Sabina, Essential oil, Fumigant toxicity, Repellency |
| Subjects: | S Agriculture > SB Plant culture |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 23 May 2016 08:14 |
| Last Modified: | 23 May 2016 08:14 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/640 |
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