How long does carbofos remain effective after a bedbug treatment? - briefly
Carbofos remains effective for approximately two to three weeks under normal indoor conditions, with higher humidity or temperature potentially reducing this period. After that time, a follow‑up treatment is generally needed to sustain control.
How long does carbofos remain effective after a bedbug treatment? - in detail
Carbofos, a carbamate insecticide applied to infestations, retains activity on treated surfaces for a limited period. Under ideal conditions—moderate temperature (20‑25 °C), relative humidity around 60 %, and porous materials such as wood or fabric—the residual effect typically lasts 14‑28 days. On non‑porous surfaces like tile or metal, the chemical degrades more quickly, often becoming ineffective within 10‑14 days.
Factors that shorten efficacy include:
- Exposure to direct sunlight or UV radiation
- High temperatures above 30 °C
- Frequent cleaning or vacuuming of the treated area
- Application of sealants, paints, or other coatings after treatment
- Presence of organic debris that can absorb or neutralize the compound
Professional guidelines recommend a follow‑up inspection after two weeks to assess residual activity and determine whether a second application is necessary. In cases where environmental conditions are unfavorable, re‑treatment may be required as early as one week after the initial application.
Safety regulations stipulate that any re‑application must respect the label‑specified re‑entry interval, usually 24‑48 hours, and the total cumulative exposure should not exceed the maximum annual limit for occupants. Compliance ensures both continued control of the pest and adherence to health standards.