How long after applying FleaNet do fleas die? - briefly
Fleas usually die within four to six hours after a correct FleaNet treatment. In some cases, a few insects may survive up to 24 hours before they are eliminated.
How long after applying FleaNet do fleas die? - in detail
FleaNet’s active ingredients, fipronil and (S)-methoprene, begin affecting adult fleas within minutes of contact. The insecticide penetrates the flea’s nervous system, causing rapid paralysis and death. Typical mortality rates are observable as follows:
- 0–5 minutes: fleas experience immobilization; many cease feeding.
- 30 minutes: most adult fleas on the treated animal are dead or incapacitated.
- 2 hours: near‑complete eradication of adult fleas on the host; residual activity continues to kill newly encountered fleas.
- 24 hours: (S)-methoprene interrupts development of eggs and larvae; hatchability drops dramatically, preventing population renewal.
- 48 hours: any remaining immature stages in the pet’s environment are unable to mature, effectively breaking the life cycle.
The speed of action depends on several factors:
- Animal size and coat type: thicker or longer fur may delay distribution of the product, extending the initial contact period.
- Ambient temperature: lower temperatures slow flea metabolism, slightly lengthening the time to lethal effect.
- Flea burden: high infestations may require multiple applications before total control is achieved.
FleaNet also provides a residual protective layer that persists for up to four weeks, maintaining the same mortality timeline for any new fleas that contact the treated surface. Consequently, the majority of adult fleas die within a few hours after a single dose, while the developmental stages are suppressed within a day, ensuring comprehensive control of the infestation.