The efficacy of some botanical insecticides againstcommon bean bruchids (zabrotes subfasciatus boh and acanthoscalides obtectus say)
| dc.contributor.author | Fivawo, Bernadeta Celestine | |
| dc.date.accessioned | 2026-03-19T07:19:55Z | |
| dc.date.available | 2026-03-19T07:19:55Z | |
| dc.date.issued | 2008 | |
| dc.description | Dissertation | |
| dc.description.abstract | Laboratory studies were carried out to investigate the effectiveness of nine botanical extracts in three formulations for the control of common bean bruchids, Zabrotes sabfasciatus Boh. and Acanthoscalides obtectus Say. on common beans and to compare the performance of dust, water and oil extract formulations. Powder formulation of Ocimum canum, Tagetes minuta, Eucalyptus globus, Ricinus communis leaves and Neuteraunenia mitis tuber were tested under laboratory conditions. The effectiveness of the extracts was compared with actellic super dust a synthetic chemical (pirimiphos methyl + permethrin) commonly used for control of bean bruchids, T.minuta was the least effective botanical followed by R. communis, O. canum and E. globus while N. mitis was the most effective, the mortality of weevils after 14 days was 100% as that of Actellic Super Dust. The results indicate that all tested botanicals have potential for protecting bean seeds against infestation by bean weevils, but N. mitis is the most effective. Water extracts formulation of O. canum, T. minuta, E. globus and R. communis had lower efficacy compared to N. mitis and Actellic Super Dust which had performed better. Oil extracts of botanicals have shown higher efficacy on bean weevils as Actellic Super Dust, and therefore have potential for protecting stored beans against infestations. The result from this study showed that N. mitis extracts and all oil extracts have higher efficacy as that of Actellic Super Dust on protecting common beans against common bean bruchids. Hence, can be used efficiently as the recommended synthetic insecticides. | |
| dc.description.sponsorship | Higher Education Loan Board | |
| dc.identifier.uri | https://www.suaire.sua.ac.tz/handle/20.500.14820/7432 | |
| dc.language.iso | en | |
| dc.publisher | Sokoine University of Agriculture | |
| dc.subject | Botanical insecticides | |
| dc.subject | Againstcommon bean bruchids | |
| dc.subject | Acanthoscalides obtectus | |
| dc.subject | Zabrotes subfasciatus boh | |
| dc.subject | Bean bruchids | |
| dc.title | The efficacy of some botanical insecticides againstcommon bean bruchids (zabrotes subfasciatus boh and acanthoscalides obtectus say) | |
| dc.type | Thesis |