When treating a flea infestation, the environment is sometimes forgotten. An environmental spray such as Ektoderm Environmental Spray may be necessary in addition to pipette treatment to control the infestation. This is because most of the flea population is not on the animal, but in the environment. Tetramethrin and permethrin are insecticides. Piperonyl butoxide enhances the insecticidal properties by inhibiting the degradation of the insecticide in the flea, extending the duration of action and increasing the antiparasitic effect. The growth inhibitor pyriproxyfen also prevents the development of flea eggs and larvae.-This is an automated translation-