Emerald ash borer : Observatree guides

The emerald ash borer (EAB, Agrilus planipennis), a beetle elonging to the family Buprestidae, is a highly destructive insect pest of ash treesraxinus species). This pest can cause extensive mortality to ash populations, especially as it is able to attack trees of all ages and sizes. Larvae have been found in branches with a diameter of just 1020 mm. Trees typically die within three to four years of initial attack with small trees often being killed in just one year.