Answer by
BrendaG (6111)
Trunk canker diseases can be deadly to sweet gum trees of which there is no cure. Leaf scorch can be the beginning of this and small insects can spread this to other trees. Spots and flecks can indicate the air pollution is causing the damage. Tent caterpillars, bagworm, fall webworm, ambrosia beetles, leaf minor and calico scale will attack. , too.