Efficacy of Granular Deltamethrin Against Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) Nymphs

A single barrier application of granular deltamethrin to the woodland edges of a forested residential community in late spring significantly reduced the abundance of Ixodes scapularis Say nymphs. The application also suppressed the population of Amblyomma americanum (L.) nymphs, which recently became established in the study area. The efficacy of deltamethrin is compared with other commonly used acaricides.