description Locust Borer Overview
The Locust Borer (Megacyllene robiniae) is a species of longhorn beetle native to eastern North America. It is characterized by its black and yellow aposematic coloration, which closely mimics the appearance of a wasp to deter predators. The insect's life cycle is dependent on black locust trees (Robinia pseudoacacia), where adults feed on pollen and larvae bore into the wood, causing damage to the host trees. They are commonly observed in the early autumn, coinciding with the blooming period of goldenrod flowers.
help Locust Borer FAQ
What does the locust borer beetle look like?
The locust borer, Megacyllene robiniae, is a black-and-yellow longhorn beetle that resembles a wasp. Its warning colors are aposematic, meaning they help deter predators.
Where does the locust borer lay its eggs?
The adult female lays eggs in the bark of black locust trees and related hosts. The larvae then tunnel into the wood, where they develop beneath the bark.
When are locust borer beetles active?
Adult locust borers are most often seen in late summer and early autumn. They commonly visit goldenrod flowers while searching for nectar and mates.
Does the locust borer damage black locust trees?
Its larvae can weaken black locust branches and trunks by creating tunnels in the wood. Healthy mature trees often tolerate some damage, but stressed or young trees can be more vulnerable.
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