Zarinpoor, M. (2015) Insecticidal and repellency effect of extracts of Taxus baccata, Artemisia absinthium, Cardaria draba and Heliotropium europaeum plant extracts on Oryzaephilus surinamensis and Sitophilus oryzae. Masters thesis, University of Zabol.
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Abstract
Stored products pests are the important constraint on agricultural crops by annual damage of 10-40%. Botanical pesticides have received a great deal of attention because of their favorable Eco-toxicological properties, e.g. low human toxicity, rapid degradation, and reduce environmental impact. These properties make them suitable insecticides for organic agriculture. In this study, contact toxicity and repellency of ethanol and hexane extracts of Taxus Baccata, Artemisia absinthium, Cardaria draba and Heliotropium europaeum were determined on Sitophilus oryzae and oryzaephilus surinamensis adults, based on complete randomized design at 27±1ºC, 65±5% of relative humidity (RH) in the dark. In plants T. baccata, C. draba and H. europaeum hexane extract caused upper contact toxicity compared with ethanol extract, but in A. absinthium ethanol extract revealed upper contact toxicity. In ethanol extracts, A. absinthium, C. draba, T. baccata and H. europaeum showed the highest toxicity on the both tested insects, respectively. However, in hexane extracts, C. draba, A. absinthium, H. europaeum and T. baccata showed the highest mortality on the both tested insects, respectively. The ethanol extract of A. absinthium revealed the highest contact toxicity with LC50 level of 44.5 and 43.4 mg/cm2 for S. oryzae and O. surinamensis, respectively. On the other hand, the ethanol extract of H. europaeum revealed the lowest contact toxicity with LC50 level of 1173.2 and 1090.2 mg/cm2 for S. oryzae and O. surinamensis, respectively. In all tested plants, the hexane extracts had the higher repellency effect compared with ethanol extracts. Our results showed the hexane extract of C.draba had the strongest repellency with more than 80% repellency on the both insects tested in concentration of 6 mg/ml. But Ethanol extract of T. baccata showed the lowest repellency with more than 70% repellency on the both insects tested in concentration of 111 mg/ml.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Taxus baccata, Artemisia absinthium, Cardaria draba, Heliotropium europaeum, insecticide, repellency, stored pest |
| Subjects: | Q Science > QL Zoology |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 28 May 2016 07:14 |
| Last Modified: | 28 May 2016 07:14 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/674 |
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