Rose chafer

The Rose chafer (Protaetia speciosissima) belongs to the order Coleoptera and the family Scarabaeidae. This beetle is well-known for its vibrant metallic green or bronze appearance, commonly spotted feeding on garden plants during the warmer months of late spring and summer.

The primary damage is caused by the adult beetles, which feed on the generative parts of plants. Their preferred food includes flower petals, stamens, pistils, and tender ovaries of various fruit trees, shrubs, and ornamental flowers like roses. This behavior directly interferes with pollination and fruit development.

The life cycle of this insect typically spans two to three years. The larval stage is spent in the soil, compost heaps, or decaying wood, where they feed on organic matter. Unlike the adults, the larvae are considered beneficial as they contribute to the decomposition of plant debris rather than harming live plant roots.

The level of harm corresponds to the beetle density. In cases of mass outbreaks, rose chafers can strip flowers bare, which significantly reduces the yield of fruit crops. This aesthetic and economic damage often necessitates intervention from gardeners who value both fruit production and flower garden displays.

Control strategies prioritize mechanical and cultural practices. It is recommended to clear decaying organic matter and deadwood from the vicinity of gardens to reduce breeding sites. Manual collection of beetles in the early morning, when they are less active due to lower temperatures, is a common and effective method to keep their populations under control.