What method involves using natural predators to control pest populations?

The method that involves using natural predators to control pest populations is biological control. This approach leverages the natural relationships in ecosystems, where certain organisms prey on or parasitize pest species, helping to reduce their numbers effectively. For instance, ladybugs are often used to control aphid populations, as they feed on these pests and can significantly diminish their presence.

Biological control is considered a sustainable and environmentally friendly strategy, as it minimizes reliance on synthetic chemicals and can often lead to more long-term pest management solutions. It integrates ecological principles, promoting a balance in the ecosystem, which can support agricultural sustainability and reduce environmental impact.