Skip to Main Content

INFORMATION ABOUT THE ONGOING NOVEL CORONAVIRUS OUTBREAK

Emerald Ash Borer Checklist

AgBusEableaves

Identify Your Tree

Ash trees are easiest to identify when leaves are on the trees; however, it can be identified by looking at the bark in the wintertime.

  • Twigs - stout, gray to green-brown with small, lateral round buds opposite each other; terminal bud is large, brown, with leathery scales flanked by two small lateral buds.
  • Leaves - oppositely arranged on twig, pinnately compound (leaf is made up of several leaflets attached to a leaf stem), and has 5 to 9 dark green leaflets (usually 7 or 9).
  • Leaflets - either no stalks or very short stalks attached to the leaf stem; smooth or sometimes finely serrated on the upper half.
  • Autumn color - green ash - yellow and orange; white ash - red and purple.
  • Bark - young bark is usually flaky; forms tall, interlacing ridges and deep furrows with age.

Now Check for Symptoms

Once you have properly identified the trees, check ash trees for the following symptoms: