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April 4, 2006 Noel Ryan Auditorium Mississauga Central Library

Gypsy Moth Resident Forum. April 4, 2006 Noel Ryan Auditorium Mississauga Central Library. Gypsy Moth Overview European Gypsy Moth ( Lymantria dispar) introduced to North America in the 1860s Considered to be the most damaging defoliating insect in Eastern North America

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April 4, 2006 Noel Ryan Auditorium Mississauga Central Library

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  1. Gypsy Moth Resident Forum April 4, 2006 Noel Ryan Auditorium Mississauga Central Library

  2. Gypsy Moth Overview • European Gypsy Moth (Lymantria dispar) introduced to North America in the 1860s • Considered to be the most damaging defoliating insect in Eastern North America • In heavy infestation periods, the Gypsy Moth is devastating to most tree species not just preferred hardwoods such as oak, maple and elm

  3. Life Cycle

  4. Mississauga’s Infestation • Gypsy Moth has present in Mississauga for more than 20 years • Staff has worked with residents monitoring population levels and offering expert advice on Integrated Pest Management (IPM) options • Conducted extensive research and sought advice from other levels of government in Canada, US and abroad for other options

  5. 2003 and 2004 began to see an increase in Gypsy Moth population levels • 2005 significant defoliation was reported in Gordon Woods and Mineola West. • Detailed inspections were conducted in July/August 2005 • Results – found trees covered with egg masses, some with as many as 800.

  6. Time Line 2003/2004 - ongoing monitoring 2005 – significant increase in population Jan. 2006 - staff report to Council outlining issue and the need for action • independent consultant, BioForest Technologies Inc. hired (requested to look at all viable control options)

  7. Mar. 2006 – treatment recommendations presented to Council (staff and consultant) • Council approved aerial spray treatment • Aerial Spray Contractor, Zimmer Air Services hired April 2006 – exemption request submitted to Transport Canada for approval May 2006 – Aerial spray treatment to begin

  8. Survey Methodology • Egg mass numbers on trees streets City woodlands some private properties • Profiled the trees type (species) size (dia. and height) health • Collected egg mass information egg masses/tree size location • Focused on City extents of infestations

  9. Over 80% egg masses found on oaks POPULATION TARGETING OAK DOMINANT AREAS Over 70% egg masses found 10m high MAKING EGG MASS REMOVAL DIFFICULT Over 60% egg masses larger than a quarter INDICATES POPULATION INCREASING

  10. Proposed Gypsy Moth Breakout Areas

  11. GYPSY MOTH SPRAY ZONES

  12. Integrated Pest Management Zones

  13. Integrated Pest Management (IPM) • decision making process that utilizes a sustainable approach to managing pests by combining biological, cultural, physical, and chemical tools in a way that minimizes economic, health and environmental risks • approach uses knowledge of pest, plant and environmental conditions to select the best combination for management strategies

  14. Integrated Pest Management (IPM) • egg mass scraping • tree skirting and banding • pheromone scents and traps • Insecticide application – Btk • Plant Health Care for Urban Forests

  15. Integrated Pest Management

  16. Gypsy Moth Egg Mass Locations

  17. Maimaiga Disease Bacterial and Viral Natural Controls Nucleopolyhedrosis Virus (NPV)

  18. Timing of Control Measures CATERPILLARS Collectand destroy, apply Btk, encourage predators PUPAE Collect and destroy MOTHS Collect and destroy, pheromone traps to capture male moths EGG MASSES EGG MASSES Scrape, collect and destroy egg masses from sheltered surfaces: trees, vehicles, outdoor equipment, and buildings

  19. Btk - Bacillus thuringiensis sub-species kurstaki • used for over 40 years in Canada • not considered a human health hazard - Health Canada (PMRA) • only toxic to small group of lepidopteron insects (larva of moths and butterflies)

  20. Approvals • Transport Canada – unable to proceed without their approval • Ministry of Transportation • Ministry of the Environment • Police – Peel, OPP, RCMP

  21. What To Expect Before The Spray • All property owners within spray zones will receive a detailed information/notification brochure • week prior – newspaper advertisements, road signs, web site update, posters, e-mail notification, hotline message,

  22. 48 to 24 hours prior– website update, hotline message update, e-mail notification to resident associations During The Spray • spray time is between 5 – 7:30 a.m. • will be able to hear the helicopter • may smell a musty odour • will not be able to see the spray – mist will be too fine and concentrated on the top of the tree canopies

  23. Following The Spray • Recommend staying indoors for 30 minutes • Use regular hygiene for clean up – washing with soap and water

  24. Information Resources • Website www.mississauga.ca/pestmanagement • up-to-date information and resources • Btk information and health links • Integrated Pest Management • E-mail: gypsy.moth@mississauga.ca • Hotline: 905-615-3200, ext. 7878

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