Bee beetle

The bee beetle (genus Trichius) belongs to the family Scarabaeidae within the order Coleoptera. These insects are well-known for their mimicry, as their fuzzy appearance makes them closely resemble bees or bumblebees. From an agronomic standpoint, they are classified as opportunistic pests that target the reproductive parts of various plants.

This pest primarily feeds on the flowers of a wide range of agricultural and wild plants. Notable host plants include fruit trees (apples, pears, plums, cherries), berry bushes (raspberries, blackberries), and several ornamental flowers. Adult beetles are most active during the flowering season, concentrating their feeding on open blossoms.

The life cycle of the bee beetle involves a complete metamorphosis. Larvae typically develop inside decaying deciduous wood or in soil rich in organic matter, where they feed on organic debris. Pupation occurs within the substrate, followed by the emergence of adults. The entire development cycle can span several years, which makes managing their population density a long-term challenge.

Damage occurs when the beetles consume petals, stamens, and pistils of the flowers. This feeding behavior disrupts the pollination process and prevents proper fruit set, leading to significant yield losses. In cases of high infestation, these beetles can severely diminish the floral display and fruit-bearing potential of individual trees or shrubs.

Control measures rely primarily on cultural and mechanical practices. It is crucial to remove stumps, rotting logs, and woody debris from orchards to eliminate larval habitats. During the flight period, manual collection of beetles in the early morning hours, when they are less active, is effective. Additionally, light traps can be used to monitor population levels and reduce the number of adults in the area.