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Release and Dispersal of
Laricobius nigrinus in NW NJ and NE PA
Mark Mayer - NJDARosa Yoo - NJFS
Phillip Alampi Beneficial Insect Laboratoryhttp://www.nj.gov/agriculture/divisions/pi/prog/biological.html
Sistens Winter Mortality in NJ
Winter2013-2014
2014-2015
2015-2016
Average Sistens Mortality
95.1% 99.1% 88.4%
Hwa in small clumps when found; on single branches
LN Releases 2005 - 2010
Overall 10,991 LN Released by NJDA3,457 LN Released by NPS
Beetles from Va. Tech.and Dick McDonald via Brad Onken
LN Dispersal Through 2016(Fall Adult and Spring Larval Survey)
17 recovery sites in 2016, 8 new, 4 in PA and 4 in NJ167 sites total (2012 to 2016)
The dispersal area extends 35 miles north to south and 49 miles east to west.
LN Adult and Larval Recovery• FALL 2015 – 15 adult beetles• Spring 2016 – 8 adult beetles, 69 larvae
– Larvae and adults were scattered as was the HWA population
• HWA population is low so there is not much to collect.
• Some areas in PA and NJ have potential as collecting sites if we ever get a HWA population back, (DEWA NPS HQ, Camelback Mt., Montclair State Univ. School of Conservation)
LN Efficacy StudyDEWA – J. Elkinton
NJ Champion Hemlock
Tre
Treated summer
2015
AcknowledgementsUSDA-Forest Service
Brad Onken (ret.) and Noel Schneeberger
Virginia TechScott Salom and Carrie Jubb for the LN
PA-DCNRDon Eggen, Houping Liu and Tim Marasco
Maryland Department of AgricultureBiff Thompson
Symbiont Biological Pest ManagementRichard McDonald
New Jersey Forest Service
Rosa YooForest Health Program
Hemlock Woolly Adelgid Program Managers Meeting 2nd Annual Meeting July 26-28, 2015 Ithaca, NY
Hemlock Woolly Adelgid Treatment(Adelges tsugae Annand)
0
50
100
150
200
250
2011 2012 2013 2014 2015 2016
# Tr
ees
Year
NJ HWA Treatments2011-2016
Soil Injection
Trunk Injection
Soil Drench
Bark Spray
Tablets
Total
Hemlock Coverages
Hired a GIS Specialist- Updating
the statewide hemlock coverage
- Cooperating with NJDA
Hemlock Woolly Adelgid(Adelges tsugae Annand)
Hemlock Cone Collection –Fall 2016
Possible foliage collection method?
Rosa Yoo 609-984-3861 [email protected] Regional Forester
Thank YouMark Mayer 609-530-4192 [email protected] Entomologist
