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Early Detection

Early Detection. Pheromone Lure Traps Male moths are caught as they try to find a mate Sticky interior. 2006-2011 Trap Catch Trends. 2008. 2006. 2007. 2009. 2010. 2011. Gypsy Moth in Minnesota. Counts increase as main population nears Population growth increasing

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Early Detection

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  1. Early Detection • Pheromone Lure Traps • Male moths are caught as they try to find a mate • Sticky interior

  2. 2006-2011 Trap Catch Trends 2008 2006 2007 2009 2010 2011

  3. Gypsy Moth in Minnesota • Counts increase as main population nears • Population growth increasing • Meteorological explanation?

  4. How Do Gypsy Moths Spread? Natural Artificial Tourism “Ballooning of larvae” Nursery stock Household moves Life stages are transported by humans 13-16 miles per year Populations expand 1¼ miles per year due to larval dispersal

  5. Predators and Pathogens • Entomophaga maimaiga • NPV (nucleopolyhedrosis virus) • Mammals • Birds • Amphibians • Invertebrates NPV E. maimaiga

  6. Factors That Influence Spread Rates • Early season temperatures & larval survival • Wind events & larval dispersal • Habitat & host abundance • Spring rains & disease incidence • Predator habitat & predation rates • PEOPLE through artificial introductions

  7. National Gypsy Moth Management

  8. Management Options • Bacillus thuringiensis var. kurstaki (Btk) • Common soil bacterium toxic to GM caterpillars • Halts feeding • Disparlure (mating disruption) • Targets adults • Reduces mating success • Diflubenzuron • Interferes with molting • Often used in nursery settings • Treatments in Minnesota have kept gypsy moth in check since 1980!

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