European green woodpecker

Taxonomy: The European green woodpecker (Picus viridis) belongs to the order Piciformes, family Picidae. While often viewed as beneficial due to insect consumption, it is considered a significant pest in orchards when it targets healthy or high-value trees for nesting or food extraction.

Host plants: This species primarily damages pome and stone fruit trees, including apples, pears, cherries, and plums. It is particularly attracted to trees with softer wood or those already showing signs of decay or stress.

Biology and lifecycle: The bird is a resident species, remaining in its territory throughout the year. Nesting usually occurs in tree cavities. Its foraging behavior changes with the seasons; in late winter, food scarcity drives it to peck deep into tree trunks, looking for overwintering insects, which significantly damages the tree's vascular system.

Damage and impact: The primary harm is mechanical: deep gouges and cavities in the bark and sapwood. These wounds serve as entry points for fungal pathogens and bacterial infections. Severe cases involve girdling the trunk, which disrupts the flow of nutrients and leads to rapid wilting or the death of the tree.

Control measures: Management involves deterrents such as visual scare devices, predatory bird decoys, and ultrasonic emitters. Proper orchard management is essential, including regular maintenance of trees to ensure they remain healthy and unappealing to woodpeckers. Covering young trunks with wire mesh or specialized protectors is highly effective in preventing direct access to the bark.