Aphids and other insects can cause damage to linden trees because they suck the juices out of the leaves. This causes the tree leaves to become distorted.
Other issues with this species of tree include mildew and leaf blight. The mildew gathers on the leaves, causing a fungus to develop. Leaf blight is a fungus that turns the leaves brown and they eventually fall from the tree. If not treated, the fungus can spread to other leaves.Learn more about Outdoor Plants & Flowers