MINNEAPOLIS (WCCO) — The City of Minneapolis is urging homeowners to not prune their ash trees because the emerald ash borer is coming out of dormancy for the season.

The beetle is active from May through Labor Day and it attacks and kills ash trees.

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The city says it’s important not to prune ash trees this time of year. They also said not to move any branches or firewood from an ash tree while the pest is active.

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The ash borer has destroyed millions of ash trees in 13 different states. Nearly 20 percent of the trees in Minneapolis are made up of ash trees.

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Not sure if you have an ash tree in your yard? See ash tree identification tips here.