Gypsy Moth

Gypsy moth (Lymantria dispar dispar) is a forest defoliating insect found in Ontario. Gypsy moth outbreaks occur every 7 to 10 years. The province of Ontario posts information here.

News & Related Events:

June 10, 2021 at 7PM – the Eastern Ontario Model Forest is hosting a Gypsy Moth webinar. They will be reporting on the current status and provide some insights into what can be expected across the region this summer. The link to register is Gypsy Moth ver. 2021 (

May 22, 2021 – Gypsy moth caterpillars ‘virtually everywhere’ in SW Ontario, expert says (

May 3, 2021 – Town of Oakville to conduct aerial spraying to combat gypsy moths (Toronto Star)

April 2021 – Gypsy Moth Information from the Regional Forest Health Network (Southern Ontario)

July 30, 2020 – FOCA webinar: Understanding the Gypsy Moth – FOCA Members are welcome to click to view the digital recording of the webinar (1 hour, 15 minutes) or download the slides (PDF, 7 MB)

Information about Gypsy Moths:

July 22, 2020 – How Ontario is battling a very hungry caterpillar (TVO) – Gypsy-moth caterpillars are killing trees throughout the province.

July 15, 2020 – Eastern Ontario in grip of worst Gypsy moth outbreak in 30 years (Belleville Intelligencer)

July 9, 2020 – Forests in Peterborough and the Kawarthas are under attack (Peterborough Examiner)

Michelle LewinGypsy Moth