Fig. 2

Influence of time of experiment on mortality at 24 h. Percentage arithmetic mean mortality at 24 h with respective 95% confidence interval (CI) for cone bioassays conducted in the first test using incorporated deltamethrin or deltamethrin-PBO nets in day (9:00–14:00 h) vs. evening (18:00–20:00) and in the second test using coated deltamethrin or with pre-exposure to PBO in the afternoon (12:00–14:00 h) vs. night (22:00–24:00 h)