It’s less than a half-inch long but it can fell a giant oak tree in no time. The goldspotted oak borer, GSOB or Agrilus auroguttatus, is a 0.4-inch bullet-shaped beetle with six golden spots on its ...

Oak trees around Minnesota have suffered from bouts of heavy precipitation and drought — conditions that make them more vulnerable to two-lined chestnut borer, a beetle that eats the inner bark of oak ...