The emerald ash borer (EAB) is a very small but very destructive beetle. The EAB is responsible for the death or decline of tens of millions of ash trees in 13 states, and was confirmed to be in Wyandotte County in August 2012.
For details about what the EAB looks like and additional information, check out this brochure.
UPDATE 7.22.14 - the latest information regarding the emerald ash borer can be found here - including information on how to determine if your trees are ash trees, and if they are infested.
While it is not believed to be widespread in Kansas yet, it is only a matter of time before EAB threatens ash trees in Lansing and Leavenworth County. UPDATE - IT IS HERE. If you have ash trees on your property and think they might be suffering from EAB infestation, you can call 785-862-2180.
The city of Lansing will post more information on this pest and what to do about it in the near future.