Proportions of female <i>An</i>. <i>gambiae</i> mosquitoes caught weekly for one year under semi-field conditions in traps containing IB1-treated nylon strips (○), LDPE sachets filled with the IB1 odour blend (●), control nylon strips (□) and control LDPE sachets (■).

<p>The treatments were used repeatedly for 52 nights without refreshing them. The solid, dotted, dashed and dashed-with-square lines represent the baseline-category logit model fit showing trends of proportions of mosquitoes attracted over time.