Rose chafer

Systematic position: The rose chafer (Cetonia aurata) belongs to the order Coleoptera and the family Scarabaeidae. This beetle is easily identified by its metallic, shiny green or bronze coloration and small white markings on its elytra, which help it blend into dense foliage.

Host plants: As a polyphagous insect, the rose chafer feeds on a wide range of plants. It is particularly damaging to flowers of ornamental shrubs, such as roses and peonies, and fruit-bearing trees like apples, pears, cherries, and plums, as well as grapevines and strawberries.

Biology and life cycle: The life cycle typically spans two to three years. Adults appear in late spring and are highly active during sunny, warm weather. Females lay their eggs in soil rich in decaying organic matter or in compost heaps. Larvae develop in this substrate, feeding on humus, though they occasionally damage plant roots.

Type of damage and harmfulness: The primary economic damage is caused by the adults, which consume the internal parts of blossoms, including petals, stamens, and pistils. This destruction prevents successful pollination and fruit set, which can lead to significant crop loss in fruit orchards and home gardens.

Management strategies: Controlling the rose chafer requires a combination of manual and environmental management practices. Key methods include:

• Manual collection of beetles in the early morning when they are sluggish.
• Soil cultivation and regular weeding to disrupt larval development sites.
• Eliminating rotten wood and optimizing organic waste management near planting areas.
• Using light traps or pheromone traps to reduce adult populations, avoiding broad-spectrum pesticides that harm beneficial pollinators.