Hortiscope: Why emerald ash borers have a tree-specific fetish
Editor's Note: We usurped Ron Smith exclusively this week to ask something readers have been wondering about.
As the emerald ash borer begins its march north, the water cooler talk has been: Why ash trees only? Are maples safe?
For that matter, why do certain types of beetles cause Dutch elm disease, a fatal ailment that does not affect other specie, readers wondered. This is what Ron told us.
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