Experts suggest prophylactic ash borer treatments not warranted beyond expected infestation areas; Hutchinson, MN

Don’t treat ash trees outside range of emerald ash borer | Hutchinson Leader
Submitted by Terry Davis on June 3, 2009 - 2:11pm.
Many people are asking if they should treat their ash trees in order to protect them from the destructive emerald ash borer, also known as EAB, which was recently found in St. Paul. The first question is, do you live near where the pest has been discovered? If so, insecticidal treatment may be a good choice, but when making the decision it’s best to be aware of the facts. In general:
Insecticides can effectively protect ash trees from EAB.
Unnecessary insecticide applications waste money. If EAB has not been detected within 10-15 miles, your trees are at low risk. Be aware of the status of EAB in your location. Current maps of known EAB populations can be found at www.emeraldashborer.info. Remember, however, that once a county is quarantined, maps for that county are no longer updated.