• Cankerworm & Gypsy Moth Fall 2017 Update

    I would like to provide the following update from Forestry with respect to Cankerworms and Gypsy Moth and the actions that are being undertaken by the city in the next few weeks.


    Please also see the workshop notice below, with a Ward 2 session scheduled on September 28th,  at Lorne Park Hall. This workshop is an education session, where staff will be teaching correct tree banding techniques. I hope you are able to attend and look forward to seeing you there.


    On September 4th to 8th , BioForest Technologies Inc., a contractor for the City of Mississauga, has begun monitoring for gypsy moth and cankerworm populations in all impacted Wards.  The main focus of their work is to outline all of the areas impacted by cankerworm and gypsy moth based on service requests and past monitoring.  This includes Wards 1, 2, 6, 7, and 8.  Additional monitoring will be taking place in Wards 5, 9, and 11 based on our existing gypsy moth monitoring program. BioForest will provide the City with both interim and final reports, late fall and early winter, on predicted population levels and defoliation forecasts for 2018 to help inform management decisions. 


    Gypsy moth egg mass surveys are the first step and will take 3-4 weeks to complete.  BioForest staff will count egg masses on trees to help forecast defoliation for 2018.  City staff will work with BioForest to scrape egg masses off trees that are easily reached to help reduce populations as part of  our regular integrated pest management program. 


    Tree banding for cankerworm will begin the week of September 25 and all bands will be installed by Oct. 6.  Female moths will be monitored and counted periodically to help estimate the populations.  Adult Moths begin to emerge from the ground around the same time as the first hard frost and they finish emerging around the first week of December. Trees in the monitoring program will be identified with a bright pink dot sprayed on the tree at breast height, and we have also attached a photo what this looks like.


    BioForest will provide an interim report to the City mid-fall that will include an analysis of gypsy moth population predictions for 2018 based on data they have collected to that point. Staff will bring an information report to Council at this time outlining findings to date. A final report will be completed at this time and submitted to Forestry, who will present the final findings and predications to Council in December once the emergence of cankerworm moths have finished and the data has been analysed.


    An aerial spraying recommendation will be part of the final report, which will be presented to Council late fall or early winter. I assure you that I continue to advocate for aerial spraying, not only in Spring 2018, but a regular program moving forward.


    If you have any questions or concerns about this information, please feel free to contact me.