Dangerous Asian Beetle Threatens Ash Trees Near Poland's Borders in Slovakia

A significant threat to ash trees has emerged near Poland's borders with the detection of the emerald ash borer (Agrilus planipennis) in Slovakia. This invasive beetle, originating from East Asia, has been identified in the village of Streda nad Bodrogom, close to the Hungarian and Ukrainian borders.

“

Adult individuals measure only a few millimeters, characterized by a metallic green coloration. The threat to trees, however, is not from adult individuals, but from larvae, which develop directly under the bark of ash trees, where they gnaw corridors in the phloem, gradually disrupting the transport of water and important nutrients.

The beetle poses a severe risk because its larvae burrow under the bark of ash trees. This feeding disrupts the vital transport of water and nutrients within the tree. Experts warn that this damage can lead to the rapid decline and eventual death of infected trees, often within two to three years of infestation.

Slovakian authorities, specifically the Central Institute for Supervising and Testing in Agriculture (ÚKSÚP), confirmed the presence of the pest after capturing 18 adult specimens in a pheromone trap during regular monitoring. Efforts are now underway to determine the full extent of the beetle's spread in the region.

“

The first sign that a tree is attacked by the beetle's larvae is the drying of the bark, starting from the top of the tree, followed by the death of branches. Complete death of the attacked tree can occur within two to three years.

Adult emerald ash borers are small, metallic green insects that appear from June to August and feed on ash leaves. However, the primary danger comes from the larvae. Initial signs of infestation include the drying of bark, starting from the treetop, followed by the dieback of branches. Authorities are appealing to the public for cooperation, asking anyone who observes these symptoms on ash trees or spots the distinctive metallic green beetles to immediately contact the relevant authorities to aid in containment efforts. Ash trees are also present in Poland, raising concerns about potential future spread.

“

Experts are now appealing to the residents of Slovakia for cooperation and to immediately contact the authorities if they notice signs of ash tree infestation or observe beetles with characteristic metallic green coloration.