Invasive Species

A colourful, invasive pest might be closer to your neighbourhood than you think, posing a significant threat to Ontario's urban forests. Read on to learn how to identify the Spotted Lanternfly (SLF), the impact it would have on our urban forest and what you can do to prevent it from spreading.

Invasive species are no stranger to the urban forest. Dutch elm disease, emerald ash borer and spongy moth are a few of the destructive species we have become familiar with. The hemlock woolly adelgid is Ontario’s newest unwelcome pest but the good news is we can all take steps to help manage it.

Spongy moth has become an unwelcome guest throughout southern Ontario. Native to Europe and Asia, this invasive moth may be more recognizable by its former names, the gypsy moth or LDD (short for Lymantria dispar dispar). In 2021, we saw a spike in the spongy moth population and with it, extensive tree defoliation in certain areas. While this non-native pest may be here to stay, here’s how you can do your part to identify it and help reduce its impact.

Did you know that the plant choices we make in our gardens can impact the urban forest and the wildlife that call it home? Non-native, invasive species continue to be popular garden choices and are widely available for purchase. Unfortunately, these species can escape our yards and wreak havoc in natural areas! The good news is that there are many beautiful native species that can be planted in their stead that have similar characteristics and only positive consequences for nature!