Add Yahoo as a preferred source to see more of our stories on Google. The tree-killing emerald ash borer made significant expansion within Fort Collins and in Colorado in 2025. The insect is now found ...

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Winter isn’t the ideal season for pruning trees in Upstate New York, but it’s the best time to cut scion or twigs from ash trees in parts of the state where the species has been all but wiped out.

This non-native beetle kills ash trees by feeding on the layer beneath the bark, cutting off water and nutrients. Approximately one-third of the trees in Fort Collins are ash trees, making the city's ...