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New Hampshire
Forest Health Update

Hemlock Woolly Adelgid Populations Rebounded Around the State
Hemlock Update

Hemlock Woolly Adelgid populations in NH are rebounding after some mild winters. Now is a good time to take down your bird feeders to help slow the spread. Annual surveys are done each winter to track the spread throughout the state. Surveys for 2021 were done in 26 towns that border HWA infested towns in NH. Towns surveyed included Marlow, Newbury, New London, Wilmot, Danbury, Hill, Andover, Franklin, Boscawen, Canterbury, Northfield, Tilton, Belmont, Gilmanton, Barnstead, Laconia, New Hampton, Center Harbor, Milton, Ossipee, Tamworth, Sandwich, Effingham, Goshen, Lempster, and Acworth. Infestations were found in Newbury, Andover, Boscawen, Canterbury, Northfield, Belmont, Barnstead, Laconia, Center Harbor, Milton, Ossipee, and Lempster.

(Click on maps for higher resolution pdfs.)

Elongate Hemlock Scale surveys for 2021 were done in 42 towns. Towns surveyed included Marlow, Newbury, New London, Wilmot, Danbury, Hill, Andover, Franklin, Boscawen, Canterbury, Northfield, Tilton, Belmont, Gilmanton, Barnstead, Laconia, New Hampton, Center Harbor, Milton, Ossipee, Tamworth, Sandwich, Effingham, Goshen, Lempster, and Acworth as part of the HWA survey. In addition, sites known to be infested with HWA in Sharon, Peterborough, Dublin, Marlborough, Westmoreland, Hancock, Bennington, Francestown, Weare, Bow, Pembroke, Allenstown, Raymond, Epping, Lee, and Newington were surveyed for EHS. New infestations were detected in Bow, Pembroke, Raymond, Epping, and Newington.

Drought Update
Unfortunately we are still in a drought that began last year. Many areas in NH continue to experience abnormally dry or moderate drought conditions. We are seeing signs of tree winter injury which is common on evergreens this time of year and can be exacerbated by dry conditions. Winter injury occurs when we experience warm temperatures while the ground is still frozen and trees cannot replace water that is lost through transpiration. We also expect to see an increase in tree dieback and mortality this summer in areas where trees have been stressed by drought and other forest pests.
Additionally it's a good idea to be careful with fire once the snow has melted. Wildfire season began early this year in areas without snow cover and there have been several small wildfires in New Hampshire recently. When burning is permitted, visit http://NHFirepermit.com to get a fire permit. The Daily Fire Danger is now identified by new Fire Danger Rating Areas (FDRA’s) instead of political boundaries. FDRA’s take a scientific approach to fire weather classification & use topography, temp, soils, fire history, fuel types, etc. You can follow @NHForestRangers on Twitter for daily fire updates. 
Emerald Ash Borer Update
Since the beginning of the year, emerald ash borer has been detected in four new towns: Campton, Newport, Plymouth, and Rumney. These detections bring the total number of infested towns in the state to 147.
EAB MANAGEMENT ZONE MAP PDF
Oak Update
Diplodia corticola aka Bot Canker was detected on red oaks in Hillsborough and Merrimack Counties from samples collected last summer. Diplodia causes branch and stem cankers and this pathogen has caused branch dieback and mortality in other states. We plan to collect more samples this year to further document its distribution in NH.

Oak wilt has yet to be detected in NH but we are working on an Oak Wilt Response Plan and are currently taking public comment. Comments can be sent to Kyle Lombard at Kyle.Lombard@dncr.nh.gov.
Red Pine Update
Red Pine Scale which was first detected in NH in 2012 continues to spread and cause mortality of red pine throughout the southern half of the state. Most recently it was detected at Annette State Forest in Rindge. This is the first detection for Cheshire County.
2021 Beech Leaf Disease Workshop
Thursday, April 15, 2021 8:30:00 AM EDT - 5:00:00 PM EDT

 

This workshop gathers forest health experts from the United States and Canada to share information regarding Beech Leaf Disease (BLD), an emerging pest of American beech. Throughout the day, a variety of presentations will be shared on topics of BLD epidemiology, distribution, control, and research efforts. Registered attendees can earn continuing educations credits for the Society of American Foresters (SAF) and the International Society of Arboriculture (ISA) for participating in the workshop. 

 

Accessibility: Captions will be provided and keyboard commands provide added accessibility in Adobe Connect. Please email us if you have any access questions.

 

For more information contact:
Cameron McIntire: cameron.mcintire@usda.gov
Danielle Martin: danielle.k.martin@usda.gov

Register
Forest Health Contacts

Kyle Lombard
Program Coordinator
Kyle.Lombard@dncr.nh.gov


603-464-3016
Jen Weimer
Forest Health Specialist
Jennifer.Weimer@dncr.nh.gov
603-419-0079
Bill Davidson
Forest Health Specialist-EAB
William.Davidson@dncr.nh.gov
603-892-5156
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