Figure 4

Odds ratio of overall insecticidal effect of pirimiphos-methyl relative to lambda-cyhalothrin on Anopheles gambiae s.l. Points indicate posterior means and error bars indicate 95% credible intervals. The first horizontal axis labels refer to the four different formulations of pirimiphos-methyl (Actellic 50 EC, CS AA, CS B and CS BM). The second horizontal axis labels refer to the material of the walls of the huts where ‘brick’ refers to walls from concrete bricks coated with cement and where banco refers to wood structures coated in dry mud. The third (bottom) horizontal axis labels refer to the period after spraying, with period 1 (months 1–3, corresponding to 40 trapping nights), period 2 (months 4–6, corresponding to 39 trapping nights), and period 3 (months 7–12, corresponding to 77 trapping nights).