Rats become particularly active during the summer months, with their peak breeding season running from March to October in the UK. Homeowners seeking an affordable solution may turn to a common kitchen staple: cayenne pepper, available for just £1 at supermarkets such as Asda.
According to Native Pest Management: "The intense spiciness of cayenne pepper is not just for cooking; it can also discourage rats by irritating their sensitive noses." Rats are highly averse to spicy odours, as their sensitive noses react badly to the irritation caused by cayenne pepper, chilli flakes, or strong chilli oil.
DIY recipe for potent rat repellent
To prepare an effective repellent, combine one tablespoon of cayenne pepper or chilli flakes with one quart (approximately 946ml) of water and a small drop of washing-up liquid. Bring the mixture to the boil in a saucepan, then allow it to cool completely. The longer it cools, the stronger the solution becomes.
After cooling, add a drop of washing-up liquid and pour the solution into a spray bottle. Apply it to areas where rats have been seen or where infestations might take hold, such as gaps around pipes, drains, roof openings, windows, doors, and damaged air bricks. For chilli oil, mix directly with water in a spray bottle and apply similarly.
Precautions and reapplication
Care is essential when working with chilli products. Keep children and pets away from treated areas, as the spice can cause considerable irritation. Reapply the mixture after prolonged rainfall or excessive dampness. An alternative method is to scatter cayenne pepper or raw chilli flakes around potential entry points.
