Serica

The genus Serica belongs to the order Coleoptera and the family Scarabaeidae. These small beetles often remain unnoticed due to their nocturnal and secretive lifestyle, yet they pose a significant threat to the root systems of various plants during their larval stage.

The pest affects a wide range of crops, including fruit trees, berry bushes, ornamental plants, and various agricultural crops. The greatest damage is caused by the larvae, which live in the soil and feed on roots, leading to the wilting and eventual death of the plants.

The biology of Serica is closely linked to its soil cycle. Females lay eggs in the ground, where the developing larvae pass through several instars, feeding on organic matter and living plant roots. Adult beetles are primarily nocturnal, feeding on the leaves of various trees and shrubs during the night.

The damage patterns are dictated by the insect's developmental stage. Larvae sever fine roots and consume the bark of larger roots, causing the plant to lose its ability to uptake essential nutrients. Conversely, adults may chew holes in leaf blades, thereby reducing the plant's overall photosynthetic capacity.

Protection strategies involve an integrated approach. Recommended practices include:

• Deep autumn tillage to destroy larvae in the soil.
• Application of biological agents such as entomopathogenic fungi or nematodes.
• Targeted use of registered soil insecticides when pest populations exceed economic thresholds.