Newsletters and Brochures
Newsletters and Brochures
St. Clair County Park News
👉Click Here for this Month's County Parks Newsletter👈
2026 Annual Progress Report
Click below
Current Job Opportunities
Summer 2026 invasive insect alerts for St. Clair County
Spotted Lanternfly (Lycorma delicatula)
Spotted Lanternfly (SLF) is an invasive insect that has NOT been detected in St. Clair County yet, but it has been found in neighboring Macomb County is expected to arrive here in the near future. The Michigan Department of Agriculture (MDARD) is asking for help with monitoring, reporting, and managing this species. SLF prefers to eat foliage of Tree-of-Heaven (also an invasive species) and many other native and non-native species of trees and grapevines and can stress or even kill the plants they feed on. Learn to make and use your own SLF trap with PennState Extension’s article, “How to Build a Spotted Lanterfly Circle Trap”. For more information on SLF in Michigan, see this recent article from MDARD: “MDARD Encourages Michiganders to Watch for Spotted Lanternfly This Summer.”
Elm Zigzag Sawfly (Aproceros leucopoda)
Elm Zigzag Sawfly is an invasive insect that HAS very recently been detected in St. Clair County. This detection is the first in Michigan and it made headlines (try searching on “Elm Zigzag Sawfly Michigan”). In its larval state, this insect defoliates several species of elms, although the damage is not typically fatal to the trees. MDARD is also asking for the public’s help in monitoring this species by using the Midwest Invasive Species Information Network (MISIN) online tool or app.
Spongy Moth (Lymantria dispar)
Formerly known as Gypsy Moth, Spongy Moth caterpillars are actively feeding (and raining frass) at this time. When the populations of Spongy Moth reach outbreak levels, it can be very stressful for trees and people. We are not expecting outbreak levels this year, however, homeowners are often the first to notice invasive species issues. To learn more or report observations of Spongy Moth in our area, visit the St. Clair County Spongy Moth Program website. For questions, contact Kirsten Lyons or 810-989-6317.
Sign Up for Our Monthly Newsletter
