2.3. Bioassays
The larvae were collected from a mosquito colony maintained at insectaria at Department of Zoology, Dayalbagh Educational Institute. The bioassays were performed as per the standard procedures recommended by World Health Organization with some modifications[14]. The
first, second, third and fourth instars larvae of An. stephensi,Cx. quinquefasciatus, and Ae. aegypti have been tested.These experiments were carried out in triplicate using 20 larvae for each replicate assay. The replicates were run simultaneously yielding a total of 60 larvae for each dosage.The larvae were placed in 50 mL disposable plastic cups
containing 15 mL of test solution and fed on larval food during all testing. Mortality and survival was established after 24 h of exposure. The number of the dead larvae in the three replicates was expressed as the percentage mortality for each concentration. The negative control was 1% MERCK deionized water while the positive control was the Chitinase
of S. griseus C6137 purchased form Sigma-Aldrich.After determining the mortality of larvae in this wide range of concentrations, a narrower range (of 4-5 concentrations,
2.3. BioassaysThe larvae were collected from a mosquito colony maintained at insectaria at Department of Zoology, Dayalbagh Educational Institute. The bioassays were performed as per the standard procedures recommended by World Health Organization with some modifications[14]. Thefirst, second, third and fourth instars larvae of An. stephensi,Cx. quinquefasciatus, and Ae. aegypti have been tested.These experiments were carried out in triplicate using 20 larvae for each replicate assay. The replicates were run simultaneously yielding a total of 60 larvae for each dosage.The larvae were placed in 50 mL disposable plastic cupscontaining 15 mL of test solution and fed on larval food during all testing. Mortality and survival was established after 24 h of exposure. The number of the dead larvae in the three replicates was expressed as the percentage mortality for each concentration. The negative control was 1% MERCK deionized water while the positive control was the Chitinaseof S. griseus C6137 purchased form Sigma-Aldrich.After determining the mortality of larvae in this wide range of concentrations, a narrower range (of 4-5 concentrations,
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