![]() balsam wooly adelgid (photo from USDA Forest Service) |
from Michigan DNR
Balsam woolly adelgid can infest true fir trees, including balsam, Fraser and concolor (white) fir in forests and landscapes in Michigan. Balsam fir can be found in conifer and mixed hardwood/conifer forests of Michigan's Upper and Northern Lower peninsulas. Unlike hemlock wooly adelgid, there are many more obvious symptoms of infected trees including loss of crown needles, swollen twigs, and white scale on the bark in addition to the small white eggs around the needles.
Balsam woolly adelgid is a sap-feeding insect that attacks true fir trees, including balsam, concolor (white) and Fraser fir. Repeated attacks weaken trees, cause twig gouting, kills branches and, over the course of several years, cause trees to die. There are nearly 1.9 billion balsam fir trees in Michigan's forests. As the third largest Christmas tree-growing state in the country, Michigan produces nearly 13.5 million fir trees each year, grown on over 11,500 acres. True fir trees, including forest, landscape and Christmas trees, are susceptible.
Balsam woolly adelgid can be introduced on infested nursery stock, Christmas trees, firewood or tree products. Though the insects don't move far on their own, they can be carried by wind, wildlife, humans or vehicles to new locations.
Adelges piceae (Ratzeburg), an invasive sap-feeding insect, were identified in lower Michigan in fall 2023. This tiny insect is native to Europe but has probably been introduced into North America multiple times.
Balsam wooly adelgid was found in 2023 Missaukee County. Since then, more infestations of BWA have been identified on balsam fir in forests in Missaukee and Clare counties. Osceola County, Marion Township is also subject to quarantine.
See much more and photos as Michigan State Univeristy
These links are checked on the date of the article. As the article ages, some links may become invalid
Go To www.getoffthecouchnews.blogspot.com for all the news
See Get Off The Couch












