Capnodis tenebrionis, known as the big-headed worm, is a beetle that mainly affects stone fruit trees such as almond trees. Adults emerge in early summer and feed on the bark of young branches. Females lay eggs at the base of trees, usually in the soil near the roots. The larvae emerge and penetrate the soil, where they look for the main roots of the almond tree to feed. These larvae have a prolonged underground phase, often two to three years, during which they feed and grow, causing significant damage to the roots. Once their development is complete, the larvae pupate in the soil and emerge as adults, completing the cycle. This pattern can repeat several times a year depending on weather conditions and host availability.