It might be time to treat your trees to prevent pine beetle infestations in the Black Hills. That’s according to US Forest Service Entomologist Kurt Allen, and Department of Agriculture and Natural Resources Forest Health Specialist John Ball. The pair have been hosting talks and information sessions on mountain pine beetle outbreaks since 1999. Last week, they stopped in Spearfish with a handful of clear messages. For one thing, the Black Hills is not necessarily on the verge of a mountain pine beetle epidemic — at least not on the scale last seen a decade ago… “Between the larvae feeding and a blue stain fungus they introduce, they kill trees very quickly,” Ball said.