Natural Enemies
The Norway maple is threatened in a few areas by the Asian long-horned beetle, which eats through the trunks, often killing the trees.
A number of species of Lepidoptera feed on Norway maple foliage. Norway maple is generally free of serious diseases, though can be attacked by the powdery mildew Uncinula bicornis, and verticillium wilt disease caused by Verticillium spp. "Tar spots" caused by Rhytisma acerinum infection are common but largely harmless.
Read more about this topic: Acer Platanoides
Famous quotes containing the words natural and/or enemies:
“I wish more and more that health were studied half as much as disease is. Why, with all the endowment of research against cancer is no study made of those who are free from cancer? Why not inquire what foods they eat, what habits of body and mind they cultivate? And why never study animals in health and natural surroundings? why always sickened and in an environment of strangeness and artificiality?”
—Sarah N. Cleghorn (1976–1959)
“What a battle a man must fight everywhere to maintain his standing army of thoughts, and march with them in orderly array through the always hostile country! How many enemies there are to sane thinking! Every soldier has succumbed to them before he enlists for those other battles.”
—Henry David Thoreau (1817–1862)