What is Killing my White Pines

Asked July 17, 2016, 10:30 AM EDT

I lost a white pine this spring / summer. It was at least 10 years old. The needles yellowed then when brown. I removed the tree (cut thru the trunk near the ground) a couple of weeks ago. When I went to burn the wood in a recreational fire I noticed hundreds of very small holes in the trunk. I lost a smaller white pine last year and I have other white pines on the property. I have a grouping of about 6 white pines (5 to 15 years old) in a twenty foot area. It looks like I have another small white pine starting to yellow. The two dead pines happened within that grouping. I also have some very mature white pines on the property. What is killing my white pines? Should I do something to help ensure I don't lose more white pines? Thank you very much for any assistance you can provide. Doug Calhoun

Crow Wing County Minnesota

1 Response

IPS bark beetles can leave bore holes in White Pine. Symptoms of decline due to them can be needles yellowing and turning red over time. I have attached a link below that shows pictures and gives information regarding them. I would recommend contacting an arborist from a local tree care company to come and evaluate the remaining trees. http://www.extension.umn.edu/garden/diagnose/plant/evergreen/pine/branchesholes.html