Biosecurity Advice: Asian Longhorned Beetle

We have been advised that a female Asian Longhorned beetle has been found on a Perth building site recently. DAFWA have inspected the area and begun surveillance but no further beetles (or activity) have been detected. DAFWA are asking us all to keep an eye out for this pest, which they suspect was a single hitch-hiker on imported cargo.

The Asian Longhorned beetle is a wood-boring pest that usually targets hardwood trees including poplar, alder, apple, ash, birch, elm,maple, mulberry, pear, plane tree, prunus, robinia, roses and willow. The potential effect of Asian Longhorned beetle on Australian native plants is unknown. It is indigenous to China but has already spread to other countries. Adults chew slits in the bark of their host plants to lay eggs. After the eggs hatch, the developing larvae feed under the bark forming tunnels. Evidence of larval infestations appears as chewed wood that has been ejected from the tunnels. Exit holes in timber are about finger width. Over time, the feeding larvae cause a decline in the tree’s health, eventually causing tree death. Adults damage trees by feeding on leaves and bark. They damage the fruiting shoots of fruit trees which result in a loss of harvest.

If you suspect you may have found an Asian Longhorned beetle, or borer holes in trees or timber items e.g. pallets, please phone the Exotic Plant Pest Hotline on 1800 084881 or download the DAFWA Pest Reporting App which enables images to be sent through to DAFWA for expert assessment.