Emerald ash borer beetle on the march across Europe

Adult emerald ash borer (Image: SPL)

The arrival of EAB from the US has raised fears about the future of ash trees in Europe

(SOURCE)  An invasive species of beetle that has killed tens of millions of ash trees in North America could “spread unhindered” across Europe, researchers have warned.

The emerald ash borer, first recorded in the Moscow area in 2007, has become established in surrounding broadleaved woodlands, they observed.

The pest, which is expected to cost the US economy $10bn, has spread up to 25 miles each year, the team estimated.

The findings of the survey have been published in the journal Forestry.

The team of two UK and two Russian scientists found that the emerald ash borer (EAB) population had spread 146 miles (235km) west of Moscow and 137 miles (220 km) south of the Russian capital city.

In their paper, the team described EAB (Agrilus planipennis) as a “major threat to Fraxinus excelsior (European ash), and south of Moscow, where the beetle has become established in natural broadleaved woodlands in which F. excelsior is a major component, many of the ash trees are suffering severe dieback and mortality”.

They added: “The abundance and almost continuous distribution of F. excelsior in these woodlands means that A. planipennis now has the opportunity to spread unhindered on a broad front to other countries in Europe.”

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