Services on Demand
Journal
Article
Indicators
Cited by SciELO
Access statistics
Related links
Cited by Google
Similars in SciELO
Similars in Google
Share
Biomédica
Print version ISSN 0120-4157
Abstract
GOMEZ-VARGAS, Wilber; VALENCIA-JIMENEZ, Kelly; CORREA-LONDONO, Guillermo and JARAMILLO-YEPES, Faiber. Novel larvicide tablets of Bacillus thuringiensis var. israelensis: Assessment of larvicidal effect on Aedes aegypti (Diptera: Culicidae) in Colombia. Biomédica [online]. 2018, vol.38, suppl.2, pp.95-105. ISSN 0120-4157. https://doi.org/10.7705/biomedica.v38i0.3940.
Introduction:
Aedes (Stegomyia) aegypti is the vector for dengue, chikungunya, and Zika arboviruses. Bti-CECIF is a bioinsecticide designed and developed in the form of a solid tablet for the control of this vector. It contains Bacillus thuringiensis var. israelensis (Bti) serotype H-14.
Objective:
To evaluate under semi-field and field conditions the efficacy and residual activity of Bti-CECIF tablets on Aedes aegypti larvae in two Colombian municipalities.
Materials and methods:
We tested under semi-field conditions in plastic tanks (Rotoplast™) four different Bti doses (0.13, 0.40, 0.66 and 0.93 mg/L) in the municipality of Apartadó, department of Antioquia, to assess Bti-CECIF efficacy (percentage of reduction of larval density) and the residual activity in water tanks containing A. aegypti third-instar larvae. The efficacy and residuality of the most lethal dose were subsequently evaluated under field conditions in cement tanks in the municipality of San Carlos, department of Córdoba.
Results:
Under semi-field conditions, the highest tested dose exhibited the greatest residual activity (15 days) after which larval mortality was 80%. Under field conditions, the highest tested Bti-CECIF doses showed 100% mortality and exhibited a residual activity of seven days in 90% of the tanks.
Conclusion:
Bti-CECIF tablets effectively controlled A. aegypti larvae under field conditions for up to seven days post-treatment.
Keywords : Aedes; Bacillus thuringiensis; disease vectors; dengue; chikungunya virus; Zika virus; Colombia.