This morning's Carlisle Sentinel has an article on a family's problems dealing with an outbreak of oakworms in their trees. They are understandably irritated with the falling caterpillar frass all over their yard. They are also worried that the defoliation would be be permanent, especially with the gypsy moth attacks, too.
The articles quotes experts from the Pennsylvania Bureau of Forestry and Cumberland Valley Tree Co. that oakworm attacks tend to be very localized. There is usually no need to spray, although homeowners can if they wish.
Forest pest stories seldom make the news unless there is something catastrophic going on. Few people know the war for existence going in the forest ecosystems just a few feet from their doors.