Fig. 5From: Indoor residual spraying practices against Triatoma infestans in the Bolivian Chaco: contributing factors to suboptimal insecticide delivery to treated householdsMedian concentrations of alpha-cypermethrin a.i. measured in each of 29 spray tanks preparations. Horizontal lines indicate the recommended a.i. concentrations for spray tanks (0.96–1.44 mg/ml) to achieve a target a.i. concentration range in houses of 40–60 mg/m2Back to article page