Tree experts say the only way to save them is to treat them with a pesticide.
"The best is to hire a commercial applicator, if the tree is too big, put your hands around it, you know four, five, six inches, then you need to hire a commercial applicator they have the products and the technology to get that into the tree," John Ball with the South Dakota Department of Agriculture said.
Ball says people who choose not to treat their trees will feel a sense of relief, because they won't notice widespread damage at first.
"But you know what? It's going to be about five years before you start noticing streaks of dying trees. That's when it's going to get people's attention," Ball said.
Not only will the widespread damage look bad, it could do unintentional collateral damage.
"The real problem with the Emerald Ash Borer infected trees, is once they die, they fall in unpredictable ways, they just don't stand there for decades, they literally will just crumble, and that's going to be a big problem in Sioux Falls, think of your ash tree how many other houses could it possibly hit if it's standing dead," Ball said.
So, many of you will have to decide if you want to pay now or pay later.
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Ash trees are everywhere in Sioux Falls. Some tall, some small, but all are susceptible to the Emerald Ash Borer.