G/ Silassie, Araya (2007) Evaluation of Powder and Essential Oils of some Botanical Plants for their Efficacy against Zabrotes subfasciatus (Boheman) (Coleoptera: Bruchidae) on Haricot Bean (Phaseolus vulgaris L.) under Laboratory Condition in Ethiopia. Masters thesis, Addis Ababa University.
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PDF (Evaluation of Powder and Essential Oils of some Botanical Plants for their Efficacy against Zabrotes subfasciatus (Boheman) (Coleoptera: Bruchidae) on Haricot Bean (Phaseolus vulgaris L.) under Laboratory Condition in Ethiopia)
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Abstract
Experiments were conducted to evaluate the efficacy of botanical powders of Jatropha curcas (L.), Datura stramonium (L.), Chenopodium ambrosioides (L.), Phytoloca dodecondra (L’Herit), Azadrachta indica (A. Juss ) and Parthenium hysterophorus (L.) and essential oil extracts of C. ambrosioides (L.), Rosmarinus officinalis (L.), Eucalyptus globulus (Labill), Trachyspermum ammi (Sprague) and Cymbopogon citratus (Stapf) against Zabrotes subfasciatus (Boh.) under laboratory conditions (27±3 oC, 50-70% RH). The test insect was reared feeding in glass jar (1L volume) and tested on whole haricot bean grains. For comparison Primiphos-methyl (0.125 g/150 g of grain) and untreated bean seed were included. The experiments were arranged in a completely randomized design with three replications. Hundred percent mortality of Z .subfasciatus was obtained with C. ambrosioides leaf powder at all levels of concentrations (5, 10 and 15 g/150 g of grain) after 24 hour exposure time. More than 90% mortality of the adult Z. subfasciatus was also observed for bean seeds treated with J. curcas, D. stramonium and P. dodecondra within 96 hour after treatment. Similarly, essential oils from C. ambrosioides, R. officinalis, E. globulus, T. ammi and C. citratus admixed to the bean at the rate of 750 mg/ 150 g showed 100% mortality of Z. subfasciatus in 24 hours after treatment. Haricot bean seeds treated with powder and essential oil extracts of the plant materials also reduced progeny production by the pest. All the five essential oils from C. ambrosioides, R. officinalis, E. globulus, T. ammi and C. citratus applied at the highest dose (750 mg) caused over 97% reduction in progeny production by the bruchid. Likewise, using powder treatments of C. ambrosioides and A. indica at all tested levels gave more than 97% inhibition in F1 progeny production by Z. subfasciatus. Essential oils from C. ambrosioides, R. officinalis, E. globulus, T. ammi and C. citratus at the highest concentration (750 mg) diluted with 10 ml acetone and applied at 1, 2 and 3 ml per filter paper was significantly (P≤ 0.05) toxic, causing 100% mortality in 24 hour. All the tested essential oil extracts had also a significant (P≤ 0.05) level of toxicity in the fumigation bioassay against Z. subfasciatus in impregnated filter paper adjusted to 24 hour exposure period. Powder and essential oil extracts of the plant materials provided effective protection of haricot bean against attack by Z. subfasciatus. Additionally, plant materials admixed to the grain did not show any significant (P> 0.05) effects on the germination potential of the treated bean seeds. In general, these results indicate that the use of powder and essential oils of the tested plants can give effective control of the most important pest of stored bean, Z. subfasciatus.
| Item Type: | Thesis (Masters) |
|---|---|
| Subjects: | Q Science > Q Science (General) Q Science > QH Natural history > QH301 Biology Q Science > QK Botany Q Science > QL Zoology |
| Divisions: | Africana |
| Depositing User: | Selom Ghislain |
| Date Deposited: | 15 Aug 2018 13:42 |
| Last Modified: | 15 Aug 2018 13:42 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/4835 |
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