Species Xylotrechus aceris - Gall-making Maple Borer

Xylotrechus aceris Fisher 1917

10‒14 mm(1)

ne NA(1)

vi-viii(1)

Various maples(2)

Eggs laid during mid-summer in wounds or at bases of dead twigs along the trunk. The larvae bore into sapwood, later tunneling into heartwood, often destroying the center of the trees. They can also cause formation of galls or swellings around the wounds. During the 2nd summer, they bore upwards or downwards and pupate in cells at end of tunnels.(2)