LDD/Spongy Moth prevention tips

The Lymantria dispar dispar (LDD) moth also known as the “Spongy” and “Gypsy” moth is an invasive species that you may have noticed mostly during its caterpillar phase as it eats all the leaves on trees! Unfortunately, this insect has arrived in Ottawa, including Blackburn Hamlet. Homeowners are encouraged to monitor their hardwood trees like oaks, maples, birch, beech, blue spruce and walnut for the presence of LDD moth caterpillars and egg masses.

Why should we care?

• Loss of tree canopy weakens trees, and can contribute to tree mortality if it happens year over year.
• The caterpillar feces droppings (known as frass) cover the ground and objects near trees (cars, patio furniture, walk ways) causing slippery surfaces, and staining that makes your outdoor areas unenjoyable!
• The caterpillar hairs can cause a poison ivy-like reaction for some if touched.
• During an infestation the caterpillars do not just remain on trees but will cover vehicles, sides of houses, roofs, outdoor furniture, windows – everywhere!

What can you do to stop or reduce the impact?

We’ve compiled some control measures and timelines to assist residents in managing this pest.

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