Discover how ArborTech can help protect and preserve the trees on your property. This brochure highlights the most common tree health threats in New Hampshire and outlines the diagnostic services, treatment options, and proactive care plans available through our expert arborists.
Tree Health Problems in New Hampshire
TOP 5
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At ArborTech , we ’ re known for safe , professional tree removals , but we can also help save trees before they need to be removed . Our team of skilled arborists also diagnoses tree health issues and can assist in providing proactive care plans to help trees thrive . Before a tree suffers irreparable damage , a professional evaluation can identify pests , diseases , or environmental stressors early , giving you options to treat and preserve your valuable trees . Curious about what might be threatening the trees on your property ? Check out our list of the top 5 tree health issues affecting New Hampshire landscapes , and learn how to spot them early .
If you see a tree health concern , or you want us to come take a look , we ’ re here to help .
Tree Health Problems in New Hampshire
TOP 5
Beech Leaf Disease
1
Red Pine Scale
2
Emerald Ash Borer
3
Hemlock Wooly Adelgid
4
Anthracnose of Sugar Maples
5
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Beech Leaf Disease
CAUSES : Beech Leaf Disease is linked to a microscopic nematode ( Litylenchus crenatae ), which disrupts leaf development in American beech and other beech species . HOW TO IDENTIFY : Look for dark bands between leaf veins , thickened or puckered leaves , and canopy thinning . Symptoms often start in the lower canopy and spread upward . IF LEFT UNTREATED : Infected trees experience severe leaf loss , reduced vigor , and can die within several years , especially younger trees . TREATMENTS : While no definitive cure exists yet , promoting tree health through proper watering and mulching slows progression . We commonly recommend Deep Root Feeding of Liquid Compost Extract .
Red Pine Scale
CAUSES : Red Pine Scale is an invasive insect that feeds on the sap of red pine trees , typically introduced through infested trees in nearby outbreaks . HOW TO IDENTIFY : Look for yellowing needles , premature needle drop , and clusters of tiny reddish or tan scale insects on the bark and needle bases , especially on the upper canopy . IF LEFT UNTREATED : Infestations can lead to rapid decline and death of red pines , often within 1–3 years , and can spread quickly in dense stands . TREATMENTS : Insecticidal treatments can help in early stages . In later stages infested trees are often removed to prevent spread . Maintaining overall tree health and avoiding stress can improve resilience .
Emerald Ash Borer
CAUSES : The Emerald Ash Borer ( EAB ) is an invasive beetle that attacks and kills ash trees by burrowing under the bark and disrupting the tree ’ s nutrient flow .
HOW TO IDENTIFY : Look for D - shaped exit holes in the bark , thinning canopy , increased woodpecker activity , and splitting bark .
IF LEFT UNTREATED : EAB infestations will kill most ash trees within 2–4 years of detection .
Hemlock Wooly Adelgid
CAUSES: Hemlock Wooly Adelgid is an invasive insect that feeds on the sap of hemlock trees, weakening and eventually killing them. HOW TO IDENTIFY: Look for white, woolly masses on the underside of hemlock branches, typically at the base of the needles. IF LEFT UNTREATED: Infested trees can decline and die within 4–10 years, depending on the level of infestation and environmental stress. TREATMENTS: Systemic insecticides can protect healthy trees, while horticultural oils or insecticidal soaps can be used for small or early-stage infestations.
Anthracnose of Sugar Maples CAUSES : Anthracnose is a fungal disease caused by Discula species , which thrive in cool , wet spring conditions and infect young maple leaves and shoots . HOW TO IDENTIFY : Look for irregular brown or tan blotches on leaves , often along veins , leaf curling , and premature leaf drop . Repeated infections can thin the canopy . IF LEFT UNTREATED : While rarely fatal , repeated defoliation can weaken trees , reduce growth , and make them vulnerable to other pests and diseases . TREATMENTS : Improve air circulation by pruning , remove fallen leaves in fall , and consider fungicide treatments in early summer during wet years . Healthy trees typically recover .
If you decide to move forward with a tree health program , we recommend all treatments be completed by the skilled professionals at our trusted partner , Belknap Tree and Plant . Their licensed team specializes in tree and plant health care and will ensure every service is delivered with the same level of expertise you ’ ve come to expect from ArborTech .
We can help coordinate your service plan with Belknap Tree and Plant to make the process easier for you .
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