Green lacewing

The genus Dichochrysa belongs to the order Neuroptera and the family Chrysopidae. While widely recognized as beneficial insects, certain species can cause management challenges for agronomists when their populations fluctuate or impact specific horticultural environments.

These insects affect a variety of plants, including fruit trees, vineyards, and vegetable crops. They are typically found in environments with adequate moisture and available vegetation, making them common in orchards and greenhouse settings where they seek both prey and plant resources.

The life cycle undergoes complete metamorphosis, consisting of egg, larva, pupa, and adult stages. The eggs are laid on distinct long stalks, a characteristic trait that separates them from other insects. The larval stage is mobile and highly active, seeking food sources across the plant canopy.

The damage potential is often contextual. While they act as predators, in some agricultural systems, their feeding habits or competitive behavior can lead to issues with plant health or yield quality. Their presence requires careful monitoring to ensure that their role as predators is not outweighed by their impact on crop development.

• Implement integrated pest management (IPM) practices.
• Avoid broad-spectrum chemical insecticides that kill non-target species.
• Establish floral strips to maintain ecological balance.
• Monitor population levels using sticky traps and visual counts.
• Prioritize the use of biological control agents and pheromone lures.

Effective management focuses on balancing the presence of these insects with the needs of the crop. Sustainable agricultural practices, such as increasing biodiversity around fields and orchards, help regulate their population without resorting to harsh chemical interventions that damage the environment.