Assessment of the biosurfactant effects produced BY Bacillus subtilis LBBMA 4914 and Pseudomonas aeruginosa LBBMA 4951E and sintetic surfactants about Culex quinquefasciatus larvaes
DOI:
https://doi.org/10.6008/SPC2179-6858.2016.002.0008Keywords:
Culex, Bioinseticide, Surfactin, RhaminolipidsAbstract
Family Culicidae mosquitoes are present throughout the national territory can act as vectors of several diseases, such as filariasis transmitted by Culex quinquefasciatus. Evidence of resistance to traditional insecticides has stimulated the development of research on new compounds with potential larvicidal action. The present study evaluated the effects of the biosurfactants ramnolipideos produced by Pseudomonas aeruginosa LBBMA 4951and lipopetides produced by Bacillus subtilis LBBMA 4914 besides synthetic surfactant SDS - Sodium Dodecyl Sulfate, Twen 80 and Triton X on larvae C. quinquefasciatus instar 3 and 4. The results proved very promising indicating great potential for bioinsecticide action on the part of the evaluated biosurfactants highlighting the surfactin action with larvicide over 75% of C. quinquefascitus specimens exposed to that surfactant for 96 hours. Regarding synthetic surfactants there was more pronounced results for Triton X-100, followed by Tween 80 and SDS with LD50 values of 1,32x10-4M, 2,52x10-4M and 2,84x10-4M respectively. Thus, from this work opens up new prospects for the use of those surfactants to control C. quinquefascitus proliferation as well as new tests to evaluate its effect on other species of Culicidae.
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