Velvet chafer

The Velvet Chafer (Maladera holosericea) is a beetle belonging to the order Coleoptera and the family Scarabaeidae. This species is widely recognized in agronomy as a significant pest affecting various plant species across European and Asian regions. Its common name is derived from the distinct dull, velvety texture of its elytra.

This pest is highly polyphagous, meaning it feeds on a broad variety of host plants. It commonly impacts fruit orchards, ornamental gardens, vineyards, and various field crops. Both adult beetles and larvae contribute to the damage, though the larval stage is responsible for the most severe agricultural destruction in the rhizosphere.

The life cycle involves complete metamorphosis, consisting of the egg, larval, pupal, and adult stages. The female beetles deposit eggs in nutrient-rich soil. The larvae remain in the soil for multiple seasons, actively feeding on organic matter and living roots. They undergo overwintering deep in the soil profile, re-emerging when temperatures rise in spring to resume feeding.

The economic impact of Maladera holosericea is severe due to the damage caused to root systems, which often leads to reduced plant vigor, stunted growth, and eventual plant mortality. Young seedlings and nursery stock are particularly vulnerable to root destruction. Additionally, adult beetles feed on foliage, resulting in skeletonized leaves and weakened photosynthesis.

Effective management requires an integrated approach. Cultural practices, such as deep soil cultivation and mechanical turning of the soil in autumn, help reduce larval populations. Chemical control involves the application of specialized soil insecticides. Biological control options include the use of entomopathogenic nematodes or fungi, which provide a sustainable alternative for long-term suppression of the pest.

• Deep autumn tillage to expose larvae.
• Monitoring adult beetle activity with light traps.
• Use of soil-applied systemic insecticides.
• Biological control using Heterorhabditis nematodes.