Mastrus ridens

Mastrus ridens is a parasitoid wasp belonging to the family Ichneumonidae (order Hymenoptera). It is widely recognized in professional agronomy as a highly effective biological control agent, specifically targeting the larvae and pupae of the codling moth, Cydia pomonella.

This species primarily impacts orchards where the codling moth causes significant damage to fruits. Unlike pests, Mastrus ridens does not feed on plant tissues, but instead searches for the overwintering cocoons of the moth located in bark crevices or warehouse structures.

The biology of the wasp involves finding the cocoon of the host, piercing it with an ovipositor, and laying an egg inside. The wasp larva then consumes the pupa of the codling moth from the inside out, completing its development within the host's cocoon shell before emerging as an adult.

The presence of this parasitoid is highly beneficial for agricultural production. By suppressing the overwintering generation of the codling moth, it significantly reduces the primary source of infestation for the upcoming growing season, serving as a key component in Integrated Pest Management (IPM).

Management strategies focus on preserving established populations of the wasp by minimizing the use of broad-spectrum pesticides. Additionally, growers can enhance the efficacy of Mastrus ridens by maintaining habitat features that offer protection and nesting sites during the off-season.

• Specialized predator of the codling moth (Cydia pomonella).
• High search capacity for overwintering cocoons.
• Reduced reliance on chemical insecticides.
• Essential component for organic and IPM apple production.