Brown lacewing

The brown lacewing (Hemerobius humulinus) belongs to the order Neuroptera and the family Hemerobiidae. In modern agronomy, this insect is highly valued as a natural predator that helps maintain the health of various agricultural and ornamental crops by hunting common pests.

These insects are commonly found on a wide range of plants, including hops, fruit trees, and various shrubs. They are particularly attracted to areas with high infestations of aphids, mites, and scale insects, which serve as their primary food source throughout their life cycle.

The life cycle of Hemerobius humulinus consists of egg, larval, pupal, and adult stages. Both the larvae and adults are voracious predators. The larvae are often referred to as aphid wolves due to their aggressive hunting behavior and ability to consume large numbers of prey in a single day.

The impact of this insect on plants is entirely positive from an agronomical perspective, as they act as a biological pesticide. However, they are sensitive to broad-spectrum insecticides. The excessive use of chemical agents often results in a secondary outbreak of pests because the natural predator population is wiped out.

Effective management strategies include minimizing chemical usage and opting for integrated pest management (IPM) practices. By providing refuges for these beneficial insects and avoiding toxic chemicals during peak activity periods, farmers can ensure long-term suppression of plant-damaging pests.