Table 1.
Larvicidal activity of differential extracts from leaves of Gossypium hirsutum against IVth instar larvae of Aedes aegypti and Anopheles stephensi
| Mosquito species | Leaves Extract(Btcot) | LC50 ±SE (mg lit−1) | 95% Fiducial limits (LCL-UCL) | LC90±SE (mg lit−1) | 95% Fiducial limits (LCL-UCL) | Regression equation |
|---|---|---|---|---|---|---|
| Aedes aegypti | Water | 211.73±21.49 | 165.01–253.86 | 528.59±52.02 | 448.88–673.31 | Y=1.93+0.0143 X |
| Ethanol | 241.64±19.92 | 201.07–282.76 | 536.98±48.96 | 460.90–669.48 | Y=1.24+0.0154 X | |
| Ethyl acetate | 358.07±32.43 | 303.74–444.33 | 750.27±96.81 | 609.91–1047.67 | Y=0.811+0.0117X | |
| Hexane | 401.03±36.19 | 342.34–501.14 | 780.38±99.93 | 635.45–1086.77 | Y=0.399+0.0114X | |
| Anopheles stephensi | Water | 232.56±26.00 | 176.31–286.13 | 625.49±77.94 | 514.72–866.47 | Y=2.18+0.0121 X |
| Ethanol | 298.54±21.78 | 257.97–347.87 | 603.70±57.19 | 515.61–760.30 | Y=0.561+0.0150X | |
| Ethyl acetate | 366.50±30.59 | 315.32–446.32 | 722.72±85.06 | 597.08–974.12 | Y=0.418+0.0125X | |
| Hexane | 387.19±31.82 | 334.72–471.24 | 735.99±85.30 | 609.77–987.03 | Y= 0.212+0.0123 |
Y mortality rate (significant at P< 0.05 level), X concentration (significant at P< 0.05 level), LC50 lethal concentration that kills 50% of the exposed larvae, LC90 lethal concentration that kills 90% of the exposed larvae, SE standard error (all values are mean of four replicates), LCL lower confidence limit, UCL upper confidence limit