The citrus oils are awesome natural pest killers when they are refined to make pesticides containing Limonene and Linalool. These oils contain toxins that can eradicate harmful pests from your herb garden.
Citrus fruits such as lemons and oranges have widespread uses in aromatherapy and making perfumes. They are also popular as food flavours and used in making soaps and cosmetics. What we underestimate is their effectiveness when it comes to garden pests. They can be a strong deterrent to invasive pests if you know how to use them correctly.