Investigation on the Genus Bacillus in the Control of Mosquitoes
| dc.contributor.advisor | Abate Dawit (PhD) | |
| dc.contributor.advisor | Gemetchu Teferi (PhD) | |
| dc.contributor.author | Wahab Abdel | |
| dc.date.accessioned | 2018-06-12T07:33:51Z | |
| dc.date.accessioned | 2023-11-08T16:39:33Z | |
| dc.date.available | 2018-06-12T07:33:51Z | |
| dc.date.available | 2023-11-08T16:39:33Z | |
| dc.date.issued | 1993-10 | |
| dc.description.abstract | Screening programmer to isolate strains of the genus Bacillus for their potential use in the control of mosquitoes was done. Over 90 spore-forming bacillus strains were examined. Six isolates AA-2, AA-6, AA-10, AA-l1, AA-71, and AA-82) have sho\m killing ability of which four (AA-2, AA-11, AA-71, and AA-82) were found to be effective. Biochemical and morphological characterizations have revealed similarity between these isolates and the Well Known mosquito pathogens (B. thuringiensis ancl B. sphaericus). The effect of temperature and aeralion supply on biomass production was studied. Isolateswere found to dliffen:nlly responcl to temperJIUle. Isol"Ias fnunu to qro\•: h'l'll at 30')C. A,;-ll 11ds been found to huve a widerange of temperature (23- 40)AA-71 has Sl10WIl io\'erse relation \,ith temperature, h'hereas isolate "\A-82 demonstrated critical decrease in growth with increase in temperature and 30~ was found to be optimal. Dry biomass was founcl to increase with the increase in aeration levels. The efficacy of the isolates was tested on different larval stages of mosquito. LC IO that ranged from 43-170 llg/ml \,as obtained. ~o siqnificant difference has been observed in sensitivity of different larval stages of mosquito to different bacteria at a significance level of 1% except isolate AA-11. Efficacy of the isolates under natural conditions was also tested. Some strains (eg. AA-82) have shown good results.Further confirmatory characterization is needed as well as investigation for optimal conditions to increase toxin yield. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/411 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Biology | en_US |
| dc.title | Investigation on the Genus Bacillus in the Control of Mosquitoes | en_US |
| dc.type | Thesis | en_US |