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Table 1 Average number of Anopheles larvae and percentage reduction for different Bti concentrations (VectoBac® WDG) after larvicide application in open field trials from October 08th 2012 on

From: Efficacy of Bacillus thuringiensis var. israelensis against malaria mosquitoes in northwestern Burkina Faso

  Average number per tub Percentage reduction
  Early instars Late instars Pupae Early instars Late instars
Day C T1 T2 T3 T4 C T1 T2 T3 T4 C T1 T2 T3 T4 T1 T2 T3 T4 T1 T2 T3 T4
0* 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 0.0 0.0 0.0 0.0 0.0         
1 46.0 12.5 0.0 0.0 0.0 48.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 73 100 100 100 100 100 100 100
2 25.0 10.5 8.0 3.0 3.3 27.3 0.0 0.0 0.0 0.0 44.5 0.0 0.0 0.0 0.0 58 68 88 87 100 100 100 100
3 24.0 23.8 20.8 12.5 12.5 32.3 0.0 0.0 0.0 0.0 14.5 0.0 0.0 0.0 0.0 1 14 48 48 100 100 100 100
4 16.0 21.3 24.0 15.3 19.23 20.0 2.0 1.8 0.0 2.0 4.8 0.0 0.0 0.0 0.0 0 0 5 0 90 91 100 90
5 13.7 17.5 21.0 14.3 15.5 14.0 20.3 8.5 6.5 9.8 1.8 0.0 0.0 0.0 0.0 0 0 0 0 0 39 54 30
6 13.7 10.0 14.8 11.5 15.8 13.7 15.3 12.3 8.8 13.0 3.0 0.0 0.0 0.0 0.0 27 0 16 0 0 10 36 5
7* 5.0 4.8 7.5 9.5 10.8 8.3 18.0 13.0 15.0 12.8 3.8 0.0 1.0 0.0 0.3 5 0 0 0 0 0 0 0
8 13.8 0.0 0.0 0.0 0.0 9.3 0.5 0.0 0.0 0.0 2.8 0.0 0.0 0.0 0.0 100 100 100 100 97 100 100 100
9 15.3 2.5 0.0 0.0 0.0 8.8 0.5 0.0 0.0 0.0 1.8 0.0 0.0 0.0 0.0 83 100 100 100 97 100 100 100
10 11.8 2.5 0.0 0.0 0.0 10.8 0.0 0.0 0.0 0.0 1.3 0.5 0.0 0.0 0.0 78 100 100 100 100 100 100 100
11 7.5 5.8 14.3 16.3 17.5 19.0 0.0 0.0 0.0 0.0 0.8 0.0 0.0 0.0 0.0 19 0 0 0 100 100 100 100
12 17.5 12.0 23.3 24.5 20.0 18.5 0.0 0.0 0.0 0.0 2.8 0.0 0.0 0.0 0.0 28 11 26 47 100 100 100 100
13 22.5 13.5 23.5 23.8 18.0 22.0 1.0 1.3 0.0 0.0 1.8 0.0 0.0 0.0 0.0 37 30 44 63 98 96 100 100
14* 11.3 9.0 25.0 13.8 17.5 23.5 4.5 1.3 10.5 3.8 2.0 0.0 0.0 0.0 0.0 0 0 0 0 90 96 73 89
15 4.0 0.0 0.0 0.0 0.0 41.5 0.0 0.0 0.0 0.0 1.5 0.0 0.0 0.0 0.0 100 100 100 100 100 100 100 100
16 0.0 14.0 8.8 8.3 0.0 46.3 0.0 0.0 0.0 0.0 3.8 0.0 0.0 0.0 0.0 0 0 0 0 100 100 100 100
17 0.0 14.0 6.8 17.8 11.5 43.3 0.0 0.0 0.0 0.0 3.8 0.0 0.0 0.0 0.0 0 0 0 0 100 100 100 100
18 7.3 12.8 4.8 17.8 25.5 38.8 0.0 0.0 0.0 0.0 8.0 0.0 0.0 0.0 0.0 0 71 0 0 100 100 100 100
19 4.5 6.5 8.8 23.8 18.5 30.3 5.5 1.0 5.0 0.0 9.5 0.0 0.0 0.0 0.0 0 13 0 0 5 38 63 100
20 11.3 5.8 10.5 17.3 13.3 31.8 8.3 1.8 10.3 3.5 5.3 0.0 0.0 0.0 0.0 36 58 0 24 0 0 28 31
21* 15.0 7.3 22.0 25.0 10.3 43.5 8.8 3.5 14.0 5.5 2.8 0.0 0.0 0.0 0.0 40 34 0 56 0 0 28 21
22 15.0 0.0 0.0 0.0 0.0 36.8 1.3 0.0 0.8 0.5 6.3 1.0 0.0 0.8 0.0 100 100 100 100 82 100 94 89
23 15.0 0.0 0.0 0.0 0.0 34.5 1.3 0.0 0.8 0.5 8.3 0.0 0.0 0.0 0.0 100 100 100 100 82 100 93 89
24 23.0 3.3 19.0 8.3 26.0 25.0 1.0 0.0 0.5 1.0 8.5 0.0 0.0 0.0 0.0 71 44 78 0 80 100 94 68
25 20.5 22.5 28.3 19.0 28.5 31.5 0.5 0.0 0.0 0.0 3.8 0.8 0.0 0.5 0.0 0 6 44 0 92 100 100 100
26 20.5 17.3 21.3 15.5 32.5 29.0 4.3 24.8 5.8 12.5 0.5 0.0 2.0 0.0 0.0 0 29 55 0 27 0 38 0
27 15.0 10.5 12.5 17.5 17.5 33.0 6.0 36.0 8.0 26.0 5.0 1.0 0.5 0.0 0.0 0 43 30 0 10 0 25 0
28 7.5 9.3 28.8 15.3 17.5 32.8 2.0 29.5 14.8 34.0 4.0 2.3 0.8 0.3 1.8 0 0 0 0 70 0 0 0
  1. *Asterisks indicate days with larvicide application. C = control, T1 = 0.2 mg/l, T2 = 0.4 mg/l, T3 = 0.8 mg/l, T4 = 1.0 mg/l.