Pimpla examinator

Pimpla examinator is a species of parasitic wasp belonging to the family Ichneumonidae. In agricultural environments, it is primarily recognized as a parasitoid that interacts with a wide range of host insects, often complicating integrated pest management strategies due to its broad host range.

The insect is frequently associated with fruit orchards, where it searches for lepidopteran pupae. While it parasitizes some pests, it is also known to attack beneficial insects, thereby acting as a hyperparasitoid in certain ecological conditions, which can lead to increased pest pressure.

The life cycle follows a holometabolous development pattern. The female wasp uses her ovipositor to pierce the protective covering of the host, laying eggs inside. The larvae then consume the host from within, pupating before emerging as adults, which usually happens over a period of several weeks depending on environmental conditions.

The economic damage is indirect rather than direct. By parasitizing beneficial parasitoids that would otherwise control major pests, Pimpla examinator interferes with the natural regulation of crop damage. This makes it a species that requires careful monitoring in orchards where biological control programs are implemented.

Management strategies focus on maintaining ecological balance to favor primary beneficials.

• Avoiding the overuse of broad-spectrum pesticides that kill both pests and their natural enemies.
• Using selective insecticides targeting only specific pest stages.
• Promoting biodiversity in orchard borders to support local entomofauna.
• Regular field scouting to assess parasitism levels in the orchard.