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Table 4 Mean (±SE) numbers of Uranotaenia 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     
-2 14.5 ± 11.2a 31.5 ± 20.1a 33.5 ± 14.5a 9.5 ± 5.2a
-1 82.3 ± 43.2a 34.8 ± 15.4a 34.5 ± 33.2a 16.0 ± 7.2a
Post-treatment     
1 61.8 ± 28.6a 3.8 ± 1.7b 0.0 ± 0.0b 0.0 ± 0.0b
2 19.5 ± 14.6a 2.5 ± 1.9ab 0.0 ± 0.0b 0.0 ± 0.0b
3 65.5 ± 59.3a 7.0 ± 3.7a 0.0 ± 0.0b 0.0 ± 0.0b
4 35.3 ± 32.6a 1.5 ± 1.2ab 0.0 ± 0.0b 0.0 ± 0.0b
5 42.0 ± 24.4a 5.0 ± 2.9ab 0.0 ± 0.0b 0.3 ± 0.3b
6 78.3 ± 60.8a 1.3 ± 1.3b 0.0 ± 0.0b 1.3 ± 0.6b
7 18.8 ± 13.3a 1.5 ± 1.2ab 0.0 ± 0.0b 11.5 ± 7.3a
8 13.5 ± 7.8a 3.8 ± 1.5ab 0.0 ± 0.0b 28.0 ± 17.3a
9 28.5 ± 28.2a 3.0 ± 3.0ab 0.0 ± 0.0b 15.0 ± 7.7a
10 21.5 ± 17.7a 4.0 ± 2.3b 0.0 ± 0.0b 26.5 ± 18.2a
11 71.0 ± 71.0a 4.8 ± 2.3ab 0.0 ± 0.0b 46.3 ± 28.0a
12 10.5 ± 10.5b 10.8 ± 9.8b 0.0 ± 0.0c 41.8 ± 20.7a
13 13.5 ± 11.9b 12.3 ± 5.0b 0.0 ± 0.0c 58.0 ± 26.9a
14 7.3 ± 3.7b 17.8 ± 11.7b 0.0 ± 0.0c 74.0 ± 29.3a
15 5.3 ± 2.9b 19.8 ± 7.2ab 0.0 ± 0.0c 26.0 ± 9.0a
20 3.5 ± 2.5ab 3.0 ± 3.0b 0.0 ± 0.0c 21.8 ± 8.4a
  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).