pine trees

Asked September 19, 2019, 8:40 AM EDT

We seem to have pine trees dieing in our front yard. we planted trees about 20 years ago. Lost about 5 of them within years. We have 2 left one is large and doing good. The other one is so much shorter and is been dieing off for the past year. We have no idea what and why this is happening. Please any info would be nice. L Kish I will try and send pics

Genesee County Michigan

6 Responses

Hello,
I really do need some photographs so that I can identify what type of evergreen these trees are and get a feel for what might be going on. Helpful pictures would include the whole tree, as well as closer images of branches and needles. Thank you!

Ruth

I sent you pictures on Thursday. Please check for 3 trees I sent on Thursday afternoon. Thanks LKish. I’ll try again.

Hello,
Thank you for these nice photographs. This spruce looks like it has Cytospora canker, which affects many of the spruces here in Michigan. If you look closely at the dead branches, you may be able to spot areas on the bark that appear sunken and coated with resin. The dead branches should be pruned out below these resin-coated areas taking care not to damage the main trunk. These branches should be burned or buried. It is important to do this work on a dry day, and to disinfest tools between cuts. Disinfesting tools can be done with a Lysol-type product. Read more about this disease in the following article:
https://extension.umn.edu/plant-diseases/cytospora-canker

This work can also be done by an arborist. It is best to consult ISA-certified arborists who can provide references. An listing of these arborists can be found on treesaregood.org.

The description you gave us for the problem we are not seeing it on the trees. I’ll see if a closer picture will be better . Please take a look again thanks Liz

The description you gave us for the problem we are not seeing it on the trees. I’ll see if a closer picture will be better . Please take a look again thanks Liz

I would recommend you send a sample of some symptomatic branches to MSU Diagnostic Services. I am attaching a link for Diagnostic Services and a link to their page on how to submit samples. For a nominal fee you can get a definitive answer as to which fungal disease is causing these symptoms and a recommendation for treatment options. It is possible that this tree has a fungal disease called Rhizosphaera needle cast disease which can be managed with fungicide spraying in the spring when needles are one-half mature length, then a few weeks later. I am attaching an article on this disease below.
https://www.canr.msu.edu/pestid/
https://www.canr.msu.edu/pestid/submit-samples/
https://hort.extension.wisc.edu/articles/rhizosphaera-needle-cast/

I hope this helps.
Ruth