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Table 2.
Mortality of larvae of Anopheles funestus s.s. depending on the concentration and botanical origin of essential oils studied after 6 h of exposure (H Kruskal-Wallis test, P < 0.05).
| Essential oils | Concentrations (ppm) |
P | ||||||
|---|---|---|---|---|---|---|---|---|
| 250 | 200 | 150 | 100 | 50 | Control | |||
| Mean numbers of dead stage IV larvae | Cymbopogon citratus | 25 ± 0.0 | 24 ± 1.4 | 22 ± 1.0 | 19 ± 0.7 | 17 ± 0.0 | 0 ± 0.0 | 0.002 |
| Ocimum canum | 21 ± 1.2 | 16 ± 1.0 | 14 ± 0.7 | 12 ± 0.7 | 10 ± 1.0 | 0 ± 0.0 | 0.005 | |
| Ocimum basilicum | 20 ± 0.7 | 15 ± 1.2 | 12 ± 1.4 | 7 ± 1.2 | 4 ± 0.7 | 0 ± 0.0 | 0.01 | |
| P | 0.0001 | 0.0001 | 0.0002 | 0.0001 | 0.0001 | – | – | |
| Mean numbers of dead stage III larvae | Cymbopogon citratus | 25 ± 0.0 | 24 ± 1.4 | 23 ± 1.5 | 20 ± 1.7 | 16 ± 0.7 | 0 ± 0.0 | 0.001 |
| Ocimum canum | 22 ± 1.4 | 19 ± 0.7 | 13 ± 1.0 | 13 ± 0.7 | 12 ± 1.2 | 0 ± 0.0 | 0.002 | |
| Ocimum basilicum | 21 ± 1.8 | 16 ± 0.7 | 13 ± 1.4 | 9 ± 1.2 | 3 ± 0.7 | 0 ± 0.0 | 0.01 | |
| P | 0.0001 | 0.0002 | 0.0001 | 0.0002 | 0.0001 | – | – | |
Average of five tests each covering 25 larvae. P = probability.
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