How do salt and baking soda affect fleas? - briefly
Salt draws moisture from fleas, causing dehydration and death, while baking soda can disrupt their exoskeleton and respiratory function, also leading to mortality. Both substances work only on contact and are less effective than professional insecticides.
How do salt and baking soda affect fleas? - in detail
Salt draws water from the exoskeleton of fleas through osmosis, causing dehydration and eventual death. When applied to a flea‑infested area, the particles contact the insect’s cuticle, disrupt the balance of fluids, and lead to rapid loss of moisture. This effect is more pronounced in immature stages because their cuticle is thinner and less resistant to desiccation.
Baking soda (sodium bicarbonate) raises the pH on the surface where it is spread. Fleas prefer a slightly acidic environment; an alkaline surface interferes with their respiratory system and reduces the viability of eggs and larvae. The compound also acts as a mild abrasive, damaging the protective wax layer on adult fleas and making them more susceptible to dehydration.
Practical use combines both agents to exploit dehydration and pH disruption:
- Sprinkle a thin layer of table salt on carpets, pet bedding, and cracks where fleas hide.
- Allow the salt to remain for several hours, then vacuum thoroughly to remove dead insects and excess granules.
- Apply baking soda to the same areas, focusing on seams and folds.
- Leave the powder for 24 hours; the alkaline environment weakens eggs and larvae.
- Vacuum again, disposing of the collected material in a sealed bag.
Safety considerations include avoiding direct contact with pet eyes and mucous membranes, as both powders can cause irritation. Use food‑grade products and keep quantities moderate to prevent dust accumulation that may affect indoor air quality.
Effectiveness diminishes on heavily infested environments or when flea populations have developed resistance to desiccation. In such cases, chemical controls or professional treatment may be necessary. The described method works best as a supplemental measure, targeting residual stages after primary eradication.