Early Detection
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Transcript of Early Detection
First Detectors Early Detection
Pheromone Lure Traps Male moths are caught as they try to find a mate Sticky interior
First Detectors
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
118 535 3911310
412
3608
12255
27,870
42425659
Gypsy Moth in Minnesota
Counts increase as main population nears Population growth increasing Meteorological explanation?
First Detectors
“Ballooning of larvae”
Populations expand 1¼ miles per year due to larval dispersal
Natural ArtificialTourism
Nursery stock
Household moves
How Do Gypsy Moths Spread?
Life stages are transported by humans 13-16 miles per year
First Detectors Predators and Pathogens
Entomophaga maimaiga NPV (nucleopolyhedrosis virus)
Mammals Birds Amphibians Invertebrates NPV
E. maimaiga
First Detectors
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
First Detectors
Population Stage
Management Strategy
Management Goal
General infestation
Suppression To protect high value resources by reducing outbreak populations
Building Slow the Spread To reduce the population peaks beginning to coalesce along the “front”
Pre-Infestation Eradication To eliminate isolated outlier populations
National Gypsy Moth Management
First Detectors 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!