Elm Leaf Beetle

As spring unfolds in Lapeer, Michigan, a tiny pest is making its presence known among our beloved elm trees. The elm leaf beetle, an invasive species that has plagued North America since the 1830s, is becoming an increasing concern for local arborists and homeowners alike.

These small yellow-green beetles, measuring about 1/4 inch long, may seem harmless at first glance. However, their voracious appetite for elm leaves can lead to significant damage over time. Both adults and larvae feed on elm foliage, with larvae causing the most destruction by skeletonizing the underside of leaves.

In Lapeer, where elm trees have long been a staple of our urban landscape, the impact of these beetles is becoming more noticeable. Affected elm trees may exhibit browning leaves and premature leaf drop, weakening them and making them more susceptible to diseases like Dutch elm disease.

While the elm leaf beetle doesn't typically kill trees outright, repeated defoliation can stress the trees, reducing their ability to provide shade and beauty to our community. This is particularly concerning given the historical significance of elm trees in Michigan and their role in our local ecosystem.

What can Lapeer residents do to protect their elms?

Regular monitoring is key. Look for small round holes in leaves (adult feeding damage) or skeletonized leaf undersides (larval damage). If you spot these signs, consider contacting a local arborist or tree care service for treatment options.

Preventive measures, such as systemic insecticides applied in the fall, can provide season-long protection for your elm trees. This same treatment can be done in the spring, but must be done early to allow the product to move throughout the tree. Tree spraying is another option for smaller elm trees.

As we face this arboreal challenge, let's remember that our elm trees are an important part of Lapeer's natural heritage. By staying vigilant and taking proactive steps, we can help preserve these majestic trees for future generations to enjoy.