Failure of carbaryl-based products to reduce brown dog tick populations in Puerto Rico

Abstract

Powders containing carbaryl, and carbaryl plus pyrethrins applied once per week to a dog were ineffective against the brown dog tick, Rhipicephalus sanguineus Latreille. A collar impregnated with carbaryl was also ineffective. A spray containing carbaryl and pyrethrins did not reduce the number of ticks on another dog nor those in the house, when applied daily to the resting place of the dog.