What are the uses of ash as insecticide?

Ash can be used as a natural insecticide due to its abrasive properties, which can damage the exoskeletons of soft-bodied insects like slugs and aphids, leading to dehydration and death. Additionally, wood ash contains potassium and other minerals that may disrupt the life cycle of certain pests when applied to soil. It can also deter some insects through its alkaline nature, making the environment less hospitable for them. Moreover, ash acts as a barrier treatment that can prevent pests from reaching plants.