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Table 2 Average number of Anopheles larvae and percentage reduction for different Bti concentrations (VectoBac® WDG) after larvicide application in open field trials from December 26th 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* 35.0 35.0 35.0 35.0 35.0 35.0 35.0 35.0 35.0 35.0 0.0 0.0 0.0 0.0 0.0         
1 35.0 0.0 0.0 0.0 0.0 34.0 0.0 0.0 0.0 0.0 1.8 0.0 0.0 0.0 0.0 100 100 100 100 100 100 100 100
2 30.5 2.3 0.0 0.0 0.0 25.0 0.0 0.0 0.0 0.0 8.0 0.0 0.0 0.0 0.0 93 100 100 100 100 100 100 100
3 19.8 3.0 3.8 7.5 0.0 25.8 0.0 0.0 0.0 0.0 10.5 0.0 0.0 0.0 0.0 85 81 62 100 100 100 100 100
4 18.8 11.3 6.5 12.3 0.0 23.0 2.0 0.0 0.0 0.0 6.3 0.0 0.0 0.0 0.0 40 65 35 100 91 100 100 100
5 21.3 14.8 11.8 12.8 20.5 15.8 2.5 2.0 0.0 12.3 0.0 0.0 0.0 0.0 0.0 31 45 40 4 84 100 87 100
6 17.0 12.5 15.5 14.0 14.8 18.5 3.5 2.0 2.8 5.8 6.0 0.0 0.0 0.0 0.0 26 9 18 13 81 89 85 69
7* 9.5 7.3 14.8 9.8 10.3 17.3 10.3 4.5 5.8 8.8 8.5 0.0 0.0 0.0 0.0 24 0 0 0 41 74 67 49
8 6.3 0.5 0.0 0.0 0.0 15.0 0.0 0.0 0.0 0.0 5.8 0.0 0.0 0.0 0.0 90 100 100 100 100 100 100 100
9 7.3 0.5 0.0 0.0 0.0 9.5 0.0 0.0 0.0 0.0 3.8 0.0 0.0 0.0 0.0 91 100 100 100 100 100 100 100
10 5.0 0.5 0.0 0.0 0.0 7.8 0.0 0.0 0.0 0.0 1.8 0.0 0.0 0.0 0.0 87 100 100 100 100 100 100 100
11 18.5 19.0 0.0 7.8 17.3 6.5 0.0 0.0 0.0 0.0 3.0 0.0 0.0 0.0 0.0 0 100 59 14 100 100 100 100
12 20.8 17.0 4.0 13.0 19.3 6.5 1.8 0.0 0.0 1.0 4.3 0.0 0.0 0.0 0.0 0 88 39 14 55 100 100 70
13 17.8 11.3 6.5 12.3 13.3 6.3 7.5 0.0 1.0 4.5 1.8 0.0 0.0 0.0 0.0 17 76 33 31 0 100 52 0
14* 12.3 5.5 6.5 9.8 11.3 7.0 10.3 1.3 2.8 11.5 3.0 0.0 0.0 0.0 0.0 41 66 22 15 0 32 0 0
15 5.5 0.0 0.0 0.0 0.0 9.0 0.0 0.0 0.0 0.0 3.8 0.0 0.0 0.0 0.0 100 100 100 100 100 100 100 100
16 1.0 0.0 0.0 0.0 0.0 7.8 0.0 0.0 0.0 0.0 5.3 0.0 0.0 0.0 0.0 100 100 100 100 100 100 100 100
17 8.0 0.0 0.0 1.3 0.0 5.5 0.0 0.0 0.0 0.0 3.5 0.0 0.0 0.0 0.0 100 100 100 100 100 100 100 100
18 18.3 17.3 10.5 9.8 5.0 1.0 0.0 0.0 0.0 0.0 5.0 0.0 0.0 0.0 0.0 0 0 33 70 100 100 100 70
19 17.5 18.3 10.5 9.8 8.5 1.8 2.5 0.0 0.0 0.0 0.8 0.0 0.0 0.0 0.0 0 0 30 47 2 100 100 100
20 14.8 13.5 17.0 11.3 4.3 6.0 7.3 1.8 0.5 2.3 0.5 0.0 0.0 0.0 0.0 0 0 4 69 17 0 79 77
21* 8.0 8.5 16.5 10.5 2.3 8.3 12.3 2.5 1.5 3.3 3.3 0.0 0.0 0.0 0.0 0 0 0 69 0 0 54 76
22 7.0 0.0 0.0 0.0 0.0 4.8 0.8 0.0 0.0 0.0 3.0 1.0 0.0 0.8 0.0 100 100 100 100 89 100 100 100
23 11.0 0.0 0.0 0.0 0.0 6.8 0.8 0.0 0.0 0.0 0.8 0.0 0.0 0.0 0.0 100 100 100 100 100 100 100 100
24 12.0 0.0 0.0 4.0 0.0 4.8 0.8 0.0 0.0 0.0 3.0 0.0 0.0 0.0 0.0 100 100 75 100 89 100 100 100
25 14.8 8.0 0.0 6.0 0.0 4.5 0.0 0.0 0.0 0.0 1.3 0.8 0.0 0.0 0.0 49 100 69 100 100 100 100 100
26 13.5 14.8 0.0 9.8 5.0 5.0 0.0 0.0 1.0 0.0 1.3 0.0 0.0 0.0 0.0 0 100 45 0 100 100 0 100
27 13.0 10.0 2.0 11.5 4.8 6.3 3.8 0.0 1.0 0.3 3.3 0.0 0.0 0.0 0.0 28 93 33 0 60 100 12 90
28 12.0 8.3 5.8 10.3 2.8 3.8 8.5 1.3 2.5 2.3 3.3 0.8 0.8 0.0 0.0 35 77 35 19 0 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 Placeholder Table 2.