Gold-spotted chafer

Systematic position: The gold-spotted chafer (Protaetia aurichalcea) belongs to the order Coleoptera and the family Scarabaeidae. This species, often recognized by its vibrant metallic green or golden-bronze coloration, is a common inhabitant of gardens and woodlands, playing a dual role in the ecosystem depending on its life stage.

Host plants: Adult beetles are generalist feeders known as polyphagous pests. They primarily target the flowers of ornamental plants such as roses, peonies, and dogwoods, as well as the blossoms of various fruit trees, including apples, pears, cherries, and plums, causing significant stress to these plants during their reproductive stage.

Biology and life cycle: The life cycle generally spans two years. Females deposit eggs into organic-rich soil, rotting wood, or compost heaps. The larvae (grubs) develop in the soil, feeding predominantly on decaying plant matter. Unlike some other scarab larvae, they are usually considered saprophagous rather than destructive to the roots of healthy plants.

Damage and pest status: The primary agricultural concern is the adult beetle. By feeding on the internal structures of flowers, including stamens and pistils, they prevent proper pollination and fruit set. In cases of high population density, these beetles may also scrape the epidermis of young fruits and leaves, leaving behind characteristic scars and tissue damage.

Control measures: Management strategies emphasize non-chemical approaches, particularly during the flowering season to protect pollinators. Recommended practices include:

• Manual collection of beetles in the early morning or evening.
• Installation of light traps to monitor and reduce populations.
• Maintaining clean orchard floors by removing excessive decaying wood or compost piles.
• Use of pheromone or floral attractant traps to divert beetles from valuable crops.