Here in the Midwest, we know what is causing the demise of our native ash trees and its selected varieties. The emerald ash borer has been invading our ash trees that have been planted around our homes, as street trees and throughout commercial properties and parks over the years. The emerald ash borer continues to wreak havoc killing numerous ash trees and its impact on our landscapes has been devastating. Now we appear to be facing a new problem that may be self-inflicted.
Unfortunately we are now seeing several young and mature evergreen trees, mostly spruce and pine, that appear to be dying at an alarming rate. The trees exhibit yellowing, distortion and dieback of terminal growth with a generalized wilting condition. In some cases, more extensive injury causes needle browning on older growth and complete tree death is occurring. At first many arborists, horticulturist, landscape technicians and extension specialist thought that this condition may have been caused by some unusual environmental factors. As time has passed, and notes have been compared, it is looking like the problem may be linked to something caused by man.
DuPont introduced a new herbicide broadleaf weed herbicide used in turf areas, called Imprelis, which has been used on sites where these symptoms are seen. Root absorption and translocation of Imprelis to new growth would explain these symptoms. Injury may not be noticed for several weeks after application. Heavy spring rains may have been a contributing factor in delivering the herbicide deeper into the soil thus causing more problems for trees.
Although it is not definitive yet as to whether or not Imprelis is the culprit of this calamity of dying evergreen trees around the country, The Ohio State University’s June ‘Buckeye Yard & Garden Line” newsletter states the common denominator in all samples of affected trees seems to be from lawn applications that used the herbicide Imprelis.
Below are images of trees suspected of Imprelis herbicide damage.
If you think that your trees have been affected, contact your professional lawn service provider and ask if Imprelis has been used on your property. You should have been given a record of what was applied to your turf areas as well.
Buck & Sons Landscape Service, Inc. customers can rest assured that we have not used this new product on any of their properties. If you have concerns or questions, we’re here to help.
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