D-allethrin based mosquito coils for mosquito control: Knockdown and mortality effects on the malaria vector anopheles gambiae sensu lato

Bioefficacy of five commonly used d-allethrin (0.1- 0.3% w/w) based coils was evaluated on non-blood fed female adult Anopheles gambiae sensu lato populations. Mortality ranged from 36% - 72% with KT₅₀ and KT₉₀ of 34.92 - 73.88 min and 143.78 - 447.54 min respectively. On the basis of the longer knockdown durations and mortality effects of the coils tested, the 0.3% d-allethrin coil should only be used as a supplement in minimizing vector-human contact and not as a sole protection measure.