Abstract
The efficacy of VectoBac DT/Bacillus thuringiensis israelensis was evaluated in the field in Barangay Buhisan, Cebu City, Philippines. Four dosages of VectoBac DT tablets were applied, namely: 1, 2, 4, and 8 tablets. Mortality rate of the larvae was observed 24 hours after the treatment every Monday and Thursday for a period of 42 days. Of 12 discarded tires, 7 were treated with 1 tablet each and the remaining 5 served as controls. With the treatment of 1 tablet/barrel, it was observed that an average efficacy of a tablet lasted for 15 days after the 1st treatment. With the use of 2 tablets/barrel, an average efficacy of 17 days was observed after the 1st treatment. With the treatment of 4 tablets/barrel, an average efficacy of 19 days was observed after the 1st treatment, while for 8 tablets/barrel, an average efficacy of 23 days was observed after the 1st treatment. In the control group, infestations of larvae were observed throughout the course of the study. However, it was noted that the number of 1st, 2nd,3rd and 4th instar larvae were decreasing every day. In discarded tires, the efficacy of a tablet lasted for 27, 12, and 7 days after the 1st, 2nd, and 3rd treatments, respectively. In the control group, infestations of high number of all instars were observed throughout the study period.
Recommended Citation
Greif, Milagros M.
(2014)
"Field Study on the Efficacy of Bacillus thuringiensis israelensis Tablets on the Larvae of Aedes aegypti in Buhisan, Cebu City, Philippines,"
CNU Journal of Higher Education: Vol. 8:
Iss.
1, Article 4.
DOI: https://doi.org/10.70997/2546-1796.1098
Available at:
https://jhe.researchcommons.org/journal/vol8/iss1/4