What you can do about yellownecked caterpillars: if you have an oak tree suffering an infestation, consider dusting the ...

How to Identify and Treat a Poison Ivy or Poison Oak Rash originally appeared on usnews.com. Update 04/22/25: This story was published at an earlier date and has been updated with new information.

Some trees are just suspect. Once a laurel oak grows more than 40 to 50 years old it seems to fill with weak joints, rotting roots and hollow trunks. These are the first to split and topple over.