The area where the trunk and the root come together is called the root collar. At this point of contact, there is a flare called the root flare. Its placement holds importance as it should be visible and exposed to air. Covering a tree’s root flare restricts its access to the air, making it susceptible to stresses. Arborists use the process of root collar excavation to treat various health issues of a tree.
The hemlock woolly adelgid (HWA) is an invasive insect that leads to the decline and destruction of hemlock trees. It is a sap-sucking insect related to aphids that uses its piercing mouthparts to penetrate the host plant tissues and feed on stored plant nutrients. The insect causes severe damage to the overall health of hemlock forests as well as those in parks and backyards.
Emerald ash borer (EAB) is an invasive beetle that has destroyed tens of millions of true ash species in 25 US states. The larvae of the beetle burrow deep into the trunk and destroy the vascular system of the tree. Trees infested with the beetle show signs like thinning in the upper canopy, serpentine galleries, and d-shaped exit holes. Stressed ash trees will eventually die within 3-5 years of the initial attack.
This blog is run by Seacoast Tree Care in Hampton, NH