How long does cleavers work against fleas? - briefly
Cleaver extracts typically reduce flea activity for about one to two days after application, with most reports indicating a 24‑48‑hour window of effectiveness. Re‑treatment is recommended on a weekly schedule to maintain control.
How long does cleavers work against fleas? - in detail
Cleavers (Galium aparine) contain saponins and volatile oils that act as insect irritants. When applied to a pet’s coat or to the surrounding environment, these compounds interfere with flea sensory receptors, leading to rapid immobilisation and death of the insects.
The immediate knock‑down effect appears within minutes of contact. Residual activity persists for a limited period, typically 24–48 hours on a wet surface. When the herb is incorporated into a dry formulation—such as a powdered spray on bedding or carpet—the protective window can extend to five or seven days, provided the product remains undisturbed.
Factors that modify the longevity of the effect include:
- Concentration of the cleavers extract; higher percentages prolong activity.
- Application method; sprays and powders retain longer than rinses.
- Ambient humidity; moisture accelerates degradation of active compounds.
- Grooming behavior of the animal; frequent bathing reduces residual protection.
For reliable flea management, repeat treatment at intervals of five to seven days. Combine the herb with regular vacuuming, washing of pet linens, and, when necessary, an additional chemical or biological control to address all life stages of the parasite. This regimen maintains a continuous hostile environment for fleas while limiting the need for frequent re‑application of the botanical agent.