How does the emerald ash borer move through a community?
The insect usually moves through the transport of firewood, which is why firewood should never be transported, since the insects generally don’t fly far from where they are hatched. Once found, populations initially build slowly before rapidly increasing as more trees become infested. As emerald ash borer populations reach peak densities, a high proportion of the untreated ash trees in the area will decline and die. This usually occurs over a period of three to five years.