Common Name: Asian longhorned beetle Native range: Asia Species Code: ANGL1 Family Name: Cerambycidae - Longhorn beetle family NJ Status: Emerging Stage 1 – Rare (may be locally common). It is highly threatening to native communities. General Description • Adult beetles are 0.75 - 1.25” long • Body is jet black with mottled white spots on the back • Antennae are 1.5 - 2.5 x the body length with distinctive black and white bands • Feet with distinct bluish tinge • Adults present May – October. • Repeated attacks lead to die back of tree crown and eventual death of tree Life Cycle • Eggs are laid in the spring. Oval to round pits are chewed out by the female starting at the crown of the tree. Heavily infested trees will have these marks on its trunk toward the base. • Larvae are rarely seen. The eggs hatch after 10 - 15 days and they tunnel under the bark and feed on living tree tissue through the fall and winter. Thick, maggot-like, with black pincers, and is about 2” long. • Pupation occurs during the winter, creates a hardened shell to go from larva to adult. • Adults emerge in the spring What to look for • Perfectly round, exit holes, .4” wide in diameter on the trunk and branches, made by adults as they exit the tree. Exit holes are large enough to put a pencil in. • Leaf die back at the crown of the tree Where to look • Feeds mostly on maple species, but may feed on any hardwood tree Look-alikes cottonwood borer (Plectrodera scalator) • Native wood-boring beetle • Host trees are poplars and willows • Distinct black and white pattern • Eggs laid at base of tree • Adults emerge from soil • Antennae are solid black whitespotted pine sawyer (Monochamus scutellatus) • Native wood-boring beetle • Host trees are conifers • Single white dot on back below the head • Males all black while females black and brown