GYPSY MOTH (LYMANTRIA DISPAR) TRAPPING & TREATMENTS IN MINNESOTA 2012 UPDATE Natasha (Northrop) Nelson, Gypsy Moth Trapping Coordinator Minnesota Department of Agriculture Plant Protection Division, Pest Mitigation & Biocontrol Unit
European Gypsy Moth Life Cycle (univoltine) Larva (5-6 Instars) 6 pair of red spots Pupa 5 pair of blue spots Adult Male Egg Mass Female
PREFERRED HOSTS OF THE GYPSY MOTH Oak Willow Birch Aspen
LIMITED NATURAL SPREAD RATE 1 ¼ miles per year due to larval dispersal. Female moths do not fly. Ballooning of larvae
ARTIFICIAL SPREAD OF GYPSY MOTH Tourism Egg masses or other life stages are transported 13-16 miles per year (1960-1990) Nursery stock Mills Household moves
MANAGEMENT NATIONALLY Three strategies of gypsy moth management Suppression: Gypsy moth population is established/reproducing Treatments conducted to suppress population/decrease defoliation Slow the Spread Treat localized populations to decrease the general population spread to < 6 km per year Eradication Eliminate start up populations
SLOW THE SPREAD (STS) Federal Program through US Forest Service Barrier Zone Concept Goal is to limit spread to <6km per year www.gmsts.org DA (Decisions Algorithm)
MINNESOTA S COOPERATIVE GYPSY MOTH PROGRAM State Partners MN Department of Agriculture MN Department of Natural Resources University of Minnesota Federal Partners USDA APHIS Plant Protection & Quarantine USDA Forest Service Gypsy Moth Slow the Spread Foundation
PROGRAM AREAS
RECENT HISTORY OF MDA S GYPSY MOTH TRAPPING & TREATMENT PROGRAMS 2009-2012
2009 Gypsy Moth Survey 27,870 moths 23,639 traps
2010 MINNESOTA TREATMENTS
Male Gypsy Moths Trapped in Minnesota 2002-2010 30000 27870 25000 20000 15000 12,255 10000 5000 0 118 535 391 1310 412 3,608 4,242
2010 ALTERNATE LIFE STAGE SURVEYS COON RAPIDS Residential Positive! STILLWATER Residential Positive! HOPKINS Trace Forward Positive!
2011 STS Treatments (~113,00 acres): - Btk (342 acres in central Duluth) - Mating disruption SPLAT (460 acres Duluth) - Mating disruption flakes 2011 Metro Area Eradications (~1500 acres): - Coon Rapids (Residential) - Stillwater (Residential) - Minnetonka (Commercial)
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 Male Gypsy Moths Trapped in Minnesota 2002-2011 30000 27,870 25000 20000 15000 10000 5000 0 118 535 391 1310 3,608 412 12,255 5,659 4,242
2012 Trapping Survey - Western Rotation: SW corner - Approximately 17,000 traps set - ~1,000 regulatory traps - 28 trapping routes, 5 lead worker areas - Sought CAI volunteers to assist with trapping in counties MDA wasn t trapping. - APHIS also trapped delimit areas in central/western parts of the state.
2012 TRAPPING / DETECTION SURVEY ~ 566 Cooperator Traps Set (in addition to MDA traps) USDA, APHIS, PPQ Coordinated trap placement of 379 traps Leech Lake Band of Ojibwe trapping cooperator set 175 of those traps County Ag Inspectors 150 traps (25 per county) Lake of the Woods Co. Clearwater Co. Todd Co. Murray Co. Freeborn Co. Waseca Co. Fond du Lac Band of Lake Superior Chippewa set 9 traps Three Rivers Park District (west metro area) 28 traps set as part of MDA s standard grid
-10,445 gypsy moths trapped (map only shows MDA trapping) - 10,444 in MDA traps - 1 in an APHIS trap - Gypsy moth numbers increased by 46% since 2011. - only 75 moths caught in southern region - 10,370 caught in northern region (mostly Lake & Cook Counties)
Male Gypsy Moths Trapped in Minnesota 2002-2012 30000 27,870 25000 20000 15000 12,255 10000 10,445 5000 0 5,659 4,242 3,608 1310 118 535 391 412 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
ASIAN DEFOLIATORS TRAPPING (USDA FARM BILL) *No A.D. traps were positive for target species in 2012.
Conducted in the Fall after trapping Used to determine if reproducing population exists EGG MASS SURVEYS
MASSES OR OTHER ALTERNATE LIFE STAGES ARE FOUND, IT CAN TRIGGER A TREATMENT. 2012: - Alternate Life stages were found in Duluth, Silver Bay, Finland & Cramer, MN - None of the sites with found alt. life stages are slated for treatments yet since they require further trapping delimitation in 2013 to better determine the extent of the population.
2013 GM Trapping Survey Plans - ~17,286 traps total - 569 milk cartons - 13,549 deltas 2013 Proposed GM Mating Disruption Treatment Locations - 63 Delimit sites (~3,168 traps) - 872 milk cartons - 2,296 deltas -Western Rotation will combine GM and EAB trapping. 2013 GM Treatment Plans - Currently in the process of being proposed. - Mating disruption treatments at four locations in NE MN. - Open houses in proposed treatment areas will held in March for outreach and a chance for the public to comment.
ARROWHEAD REGION OF NE MINNESOTA - There has been a persistent influx of moths inland from the north shore of northeastern MN since the wave that came through in 2009. This has since implemented some changes. Milk Carton Trap - Milk Carton Trapping bigger traps accommodate for more moths in Cook County and select areas of Lake County. - 2012 Trapping: The STS Action Area trapping density was changed due to budget cuts 2K to 3K base grid (traps spaced further apart). - Post 2012 Trapping: STS will not be treating in Cook County anymore since the STS Action Area has passed through the area, leaving it in the STS Monitoring Area with a 5K trapping grid for 2013. The next phase would be Generally Infested Area. 2009 GM Trapping Results - Post 2012 Trapping: Quarantines are likely in the near future for Cook & Lake Counties. We have criteria to determine where and when quarantines will occur.
Biocontrol Releases Monika Chandler, MDA
GYPSY MOTH (LYMANTRIA DISPAR) MONITORING & TREATMENTS IN MINNESOTA MDA PROGRAM UPDATE Natasha M. (Northrop) Nelson Gypsy Moth Trapping Coordinator Minnesota Dept. of Agriculture Plant Protection Division Pest Mitigation & Biocontrol Unit 625 Robert St. N St. Paul, MN 55155 651-201-6692 natasha.nelson@state.mn.us Arrest the Pest: 1-(888)-545-MOTH gypsy.moth@state.mn.us