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Table 2 Results with wild free-flying pyrethroid-resistant An. gambiae s.l. mosquitoes entering IRS treated experimental huts in Cové, Benin

From: Indoor spraying with chlorfenapyr (a pyrrole insecticide) provides residual control of pyrethroid-resistant malaria vectors in southern Benin

Hut treatments Control Alpha alone Alpha + chlorfenapyr mixture formulations Chlorfenapyr formulations Positive control
Untreated hut FS4 FS2 FS5 FS1 FS7 HKI Sylando® SC Bendiocarb
Females caught 6167 3488 4350 3383 3153 2563 2784 3187 3411
% Deterrence –  43 29 45 49 58 55 48 45
% Exophily 50 100 98 94 80 79 78 71 96
95% conf. limits 48–51 99–100 97–98 93–95 79–81 77–80 77–80 69–72 96–97
N blood-fed 6141 3455 4325 3365 3079 2492 2771 3154 3353
% Blood fed 100 99 99 99 98 97 100 99 98
95% conf. limits 99–100 98–100 99–100 99–100 97–98 96–98 99–100 99–100 97–100
N dead 72 h 50 144 782 746 1243 1028 1044 1462 432
% Overall 72 h mortality* 1a 4b 18c 22d 39e 40e 38e 46f 12g
95% conf. limits 0–2 3–5 17–19 21–23 38–41 38–42 36–39 44–48 11–13
  1. *Values along this row bearing the same letter superscript are not significantly different (P > 0.05, logistic regression)