Investigation of mosquitocidal activity of a combined extract of Bryophyllum pinnatum and Aloe barbadensis leaves
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Date
2014
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ISSN Online: 2151-7525, doi:10.5251/abjna.2014.5.3.118.122 © 2014, ScienceHuβ, http://www.scihub.org/ABJNA
Abstract
This study was focused on investigating the combinatorial effect of Aloe barbadensis and
Bryophyllum pinnatum on mosquito population with the aim of producing an effective anti mosquito agent. Extracts from both plants were combined and prepared in varying concentrations
of 100mg/ml, 50mg/ml and 25mg/ml and were applied against laboratory-bred mosquito of known
population densities. Mortality of the mosquito after application of each concentration of the
extract was assessed at 15 minutes interval for 1 hour by dividing the number of death mosquito
by the total number originally bred in the box and the product multiplied by 100. The investigation
revealed 6.6% mortality rate when 25mg/ml of the combined extract was applied while 68.9% was
recorded for 50mg/ml over the one-hour period of investigation. Maximum toxicity of 100% was
recorded within 15 minutes when 100mg/ml of the extract was applied to the mosquito density
indicating that as the concentration of the extract increases, its toxicity on the insect also
increase. In conclusion, the combinatorial effect of both extracts showed a promising
mosquitocidal activity especially at a concentration of 100mg/ml of combined extract
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Abubakar et al., 2014