Table 1

Larval mortality and emergence inhibition of An. gambiae s.s. after exposure to neem oil and corn oil formulations.


Larval mortality †
Emergence inhibition



192 ‡
72




Oil
LC50
LC90
LC50
LC90
EI50
EI90

Neem
10.7 (7.55–12.15)
24.12 (12.37–37.68)
22.11 (17.14–31.42)
109.34 (65.48–256.20)
6.44 (5.01–7.99)
17.38 (14.62–21.91)
Corn
50.6 (37.96–88.69)
86.85 (62.29–133.67)
58.24 (42.24–121.66)
91.79 (63.54–208.38)
47.28 (14.40–91.27)
79.75 (16.65–135.36)

† All concentrations in parts per million (ppm) with 95% confidence intervals between brackets; ‡ Hours after exposure. Six concentrations were tested and replicated with 50 mosquitoes six times each (n = 300). LC and EI values were determined by probit analysis (Finney 1971). Mortality was corrected using Abbott's formula (Abbott 1925) with values obtained from the negative control.

Okumu et al. Malaria Journal 2007 6:63   doi:10.1186/1475-2875-6-63

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