From the City of Mississauga
Forestry Section
Parks, Forestry & Environment Division

The City continues to provide essential Forestry services at this time and is prioritizing work to keep residents and our urban forest safe and healthy. In May, contractors working in behalf of the City of Mississauga will conduct localized ground sprays and tree injections on targeted public trees located in parks and along streets within selected areas as part of its Integrated Pest Management (IPM) program to manage invasive Gypsy Moths across the city.

In 2020, Gypsy Moth management will be conducted in Wards 3, 4, 5, 7, 8, and 9 where monitoring has indicated specific areas with a higher population of Gypsy Moth and the potential for impacts to the city’s urban forest canopy. Elsewhere in the city, monitoring data show that the population of Gypsy Moths is forecasted to remain at low levels in 2020. Many of these areas have been the focus of IPM in previous years by the City and will continue to be part of the ongoing monitoring to determine yearly work plans in the future.

Both tree injections and ground spray treatments are extremely time sensitive and dependent on weather conditions, gypsy moth caterpillar size, and leaf emergence. As a result, exact timings for this essential work are not yet known. For more information about Gypsy Moth including treatment locations, frequently asked questions and updates on the timing of work can be found on the City’s website at The City will continue post updates on this webpage as well as to Parks & Forestry’s Facebook and Twitter channels throughout the month of May.

Residents living in areas where tree injections or ground sprays will be taking place will receive notification through the mail.

Given the targeted nature of the Gypsy Moth treatment this year, no specific safety measures are required on the behalf of residents this year. However, if you come in proximity of City staff or contractors, please maintain a physical distance of at least 2 metres (or 6 feet) for your safety and theirs.

Only publicly owned trees will be treated through the City’s Gypsy Moth Management program. Forestry staff recommend that residents in areas where Gypsy Moths are present take some preventative measures to manage Gypsy Moths on their property. Learn more at