By: John Gall, Municipal Specialist WI-0249AM, & Ron Gumz, Certified Arborist MN-0324A
Sometimes when we are faced with a new challenge such as emerald ash borer (EAB), it can be less stressful if we can learn from others who have had similar experiences. Many common interest network groups are based on this premise. Thankfully, here in southeast Wisconsin, we have experience and knowledge gained from many other communities in Illinois, Indiana, Ohio, and Michigan who have been dealing with EAB much longer than we have. This network of tree care professionals has given us many insights on how to deal with the impending rise in numbers of EAB in southeastern
Here are some important lessons learned over the past 10 year s of dealing with emerald ash borer:
- Eradication cutting has not worked to eliminate the pest. It’s here to stay.
- Preventive treatments will work to save valuable ash trees.
- It will take additional time and money to deal with this insect.
- Don’t move firewood. This is the most common way EAB is spread.
- This insect is coming. It’s just a matter of time before it will be in your neighborhood.
We have learned pesticide treatments work best as a preventive measure. The City of
We have learned any ash tree that is not protected, regardless of how close the nearest ash tree is, will be a target for EAB feeding. Usually by the time the symptoms of EAB become apparent; the tree is in an irreversible state of decline and cannot be saved. Trees can live with this borer for several years before showing symptoms. During the first few years (years 1 – 4) of an EAB infestation, insect activity is hard to detect. Beginning in year 5, and continuing through at least year 12, the insect population explodes, rising exponentially in areas where ash protection is limited or non-existent. Community budgets become overwhelmed; homeowners are overwhelmed; professional arborist firms are overwhelmed trying to keep up with the demand for timely removal services.
We have learned how it will take extra effort to deal with this insect as in this example from
ARLINGTON HEIGHTS - While
We have also learned about how infested ash wood and other debris can speed the spread of emerald ash borer. The WI-Department of Agriculture, Trade and Consumer Protection and other governmental agencies have done a good job of getting the information out about not moving firewood. When ash trees are removed, the insect remains in the wood. The
We have learned if you have an ash tree, you need to be concerned! In monitoring the spread of EAB in northern