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Hemlock Woolly Adelgid
Call GreenWorks now for treatment of hemlock trees in Eastern Fairfield and New Haven Counties. All hemlocks in the area are susceptible and the pest is very ubiquitous in Connecticut.  It might take years of infestation before you notice severe signs of the pest, don’t wait till woolly adelgid has already established itself on your hemlock trees. Many treatment options are available. Effective organic options are available for all but the largest trees.


Hemlock Woolly Adelgid in CT

Hemlock woolly adelgid is a very small invasive insect that feeds on the sap and nutrients of hemlock trees. Woolly adelgid was first recorded on the east coast in 1951 and since then has killed about 80% of our native eastern hemlocks (aka canadian hemlock) which are important forest and landscape trees. Hemlock trees continue to decline and die in connecticut due to hemlock woolly adelgid.  Some trees have show some resistance but high levels of resistance is rare.


Damage and Signs of Hemlock Woolly Adelgid

Hemlock Wooly Adelgid in CT
Hemlock Woolly Adelgid powdery coating

Woolly Adelgid has some mobile life stages but eventually attaches itself to the base of hemlock needles for the duration of it’s life and extracts nutrients from the tree. Trees infested by woolly adlegid often die a slow death which could take over a decade.  This long period of decline usually gives the opportunity for treatment but if a tree is untreated for more than a few years it may be impossible to return to dense foliage and an appealing shape. Nearly all trees in CT need to be treated if they are to remain healthy, hemlock woolly adelgid is very ubiquitous in the area and we have rarely seen an untreated tree without signs of woolly adelgid.  If your hemlock trees have thin or sparse foliage and they are not dense dark green than the likely cause is hemlock woolly adelgid.  Other adelgid-like insects can cause these symptoms as well even if the tree is being treated for woolly adelgid, that’s why proper pest scouting and treatment strategy is important. One of the best methods of looking for woolly adelgid is to simply turn over a small branch and visually inspect for the powdery protective coating produced by woolly adelgid.


Treatment Options

There are a number of effective treatment options including Horticultural oils and systemic products. Effective organic options are available but must be sprayed on the foliage, therefore very tall trees may be difficult to control with strictly organic products.  Followup scouting of hemlock woolly adelgid and other pests such as elongate hemlock scale is important.  Treatment strategy should be adjusted to control these pests if they are found. GreenWorks has years of experience diagnosing and treating hemlock trees for woolly adelgid and other pests. Give us a call if you have any questions or would like a quote on treatment in Eastern Fairfield or New Haven counties.