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Table 2 Mean (±SE) numbers of Anopheles spp. larvae and pupae sampled pre- and post-treatment with larvicides in temporary pools at San Simón beach, Mazatán municipality, Chiapas, Mexico

From: Efficacy and non-target impact of spinosad, Bti and temephos larvicides for control of Anopheles spp. in an endemic malaria region of southern Mexico

  Treatment
Time (Weeks) Control Bti Spinosad Temephos
Pre-treatment     
-5 0.0 ± 0.0a 4.8 ± 2.3a 2.5 ± 2.2a 2.3 ± 2.3a
-4 0.0 ± 0.0b 0.0 ± 0.0b 2.3 ± 1.9ab 5.0 ± 4.4a
-3 9.5 ± 8.2a 18.0 ± 12.8a 12.3 ± 10.0a 15.8 ± 15.1a
-2 1.3 ± 0.8a 11.3 ± 6.0a 4.0 ± 1.7a 1.0 ± 1.0a
-1 8.0 ± 5.7a 19.8 ± 5.1a 25.3 ± 14.9a 31.8 ± 22.2a
Post-treatment     
1 1.3 ± 0.8a 5.5 ± 5.5a 0.0 ± 0.0a 0.0 ± 0.0a
2 0.8 ± 0.8b 9.8 ± 5.5a 0.0 ± 0.0b 0.0 ± 0.0b
3 2.5 ± 2.5b 13.0 ± 5.6a 0.0 ± 0.0b 0.0 ± 0.0b
4 3.3 ± 3.3ab 9.3 ± 6.6a 0.0 ± 0.0b 0.0 ± 0.0b
5 4.8 ± 4.1a 1.5 ± 0.6ab 0.0 ± 0.0b 0.0 ± 0.0b
6 0.0 ± 0.0b 4.0 ± 1.8a 4.5 ± 4.5a 0.0 ± 0.0b
7 1.5 ± 1.5a 0.8 ± 0.8a 1.5 ± 1.5a 0.0 ± 0.0a
8 0.0 ± 0.0b 4.0 ± 1.4a 0.0 ± 0.0b 0.0 ± 0.0b
9 1.5 ± 1.2a 1.5 ± 1.0a 0.0 ± 0.0a 0.0 ± 0.0a
10 7.5 ± 5.7a 7.5 ± 5.2a 0.0 ± 0.0b 2.3 ± 2.3a
11 2.5 ± 1.0a 4.0 ± 3.4a 0.0 ± 0.0b 11.5 ± 9.3a
12 5.5 ± 4.6a 0.3 ± 0.3b 0.3 ± 0.3b 0.0 ± 0.0b
13 11.8 ± 7.9a 27.3 ± 7.5a 0.0 ± 0.0b 21.5 ± 20.2a
14 7.5 ± 5.7a 6.8 ± 4.2a 0.0 ± 0.0b 0.8 ± 0.8b
15 11.8 ± 3.9a 10.3 ± 2.5a 0.0 ± 0.0b 8.0 ± 3.4a
20 20.5 ± 3.5a 26.5 ± 19.3a 2.0 ± 2.0b 16.3 ± 4.5a
  1. Values followed by identical letters did not differ significantly for comparisons within rows (mixed model analysis on ln (x + 1) transformed values with Toeplitz correlation structure, P > 0.005 following Bonferroni correction).