Asian Longhorned Beetle Workshop

By Hong Tran & Lammy Nguyen

During this informative workshop, we learned about the Asian Longhorned Beetle and the Emerald Ash Borer. It was led by Sam Stelmack, an invasive species expert, who did an amazing job with her presentation.

The Asian Longhorned Beetle is an invasive species that originated from parts of Asia such  as China and Japan. It migrated to the United States by palettes in ships. It came to Worcester, MA fifteen years ago and since then, over 30,000 trees were removed due to this bug. A ten mile radius had to be quarantined around each infected tree. Boston had first spotted the ALB around 3 years ago.

The Asian Longhorned Beetle has many characteristics such as blue feet, white spots on their back, black and white antennas, and females are known to be much bigger. One way to spot if a tree has been invaded by the ALB is if you see a perfectly round hole, around the diameter of a pencil. That hole is called an exit hole.

The Emerald Ash Borer also a beetle native to Asia, was first found in Michigan. It spread rapidly throughout the northern, eastern, and southern parts of the US. EAB is mostly attracted to ash trees, making “D” shaped exit holes. They feed on inner bark and phloem, creating “S” shaped galleries. The characteristics of the EAB is green on the outside and the purple on the inside, miniature sized antennas and a shiny and smooth shell.

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