The effectiveness of diatomaceous earth against fleas is dependent on several factors. These factors include the type of diatomaceous earth used, the severity of the flea infestation, and environmental conditions such as humidity. Diatomaceous earth works by absorbing the lipids from the flea’s exoskeleton, leading to dehydration and eventual death.
Proper application and the use of food-grade diatomaceous earth are crucial for maximizing its efficacy and ensuring safety for pets and humans. The severity of the infestation plays a significant role; a light infestation may be resolved quicker than a severe one. Furthermore, dry conditions are essential because diatomaceous earth loses its effectiveness when wet.