linden tree disease
Can you identify this disease that has killed my linden tree? It started dropping leaves a couple seasons ago, then this spring, just didn't hardly leaf out at all and I have had to cut it down. All of the wood was riddled with these spots, greenish brown. I'd like to know if it is something that has a treatment in case other trees start to get it thanks! I voted to support Extention !!!
Lane County Oregon
Wow, interesting issue! A couple of questions for you to help narrow this down:
Did the spots have this discoloration right when you cut the trunk or did the dark color appear at a later time (I'm wondering if this is a surface mold)?
Did you notice any abnormal appearance (other than the leaf issue you mentioned)? Any mushrooms or other fungi present on the tree or nearby?
Did the tree experience any wounding or injuries (storm damage, lawnmower, construction in vicinity)?
Just from the photo, the spots look like the start of a wood decay fungus. These fungi tend to attack stressed, dying or dead trees. It may be that this tree was stressed in the extreme winter cold that the area experienced a few seasons ago (which was followed up by some stressful summer heat). That stress allows the decay fungi to get a foothold.
I'm happy to take a further look at the trunk pieces or additional photos. You can send an email to firstname.lastname@example.org or, if you live nearby, drop off a sample at the Extension office at 996 Jefferson St in Eugene.
Take care and thanks for using Ask An Expert!
Wanted to let you know that I'm running this problem by the OSU plant pathologist so I can give you the best course of management action. I will respond via your email once I have some additional information to share.
The holes you describe could definitely be sapsucker (a type of woodpecker) injury. Compare the photos here to what you saw on your tree.
Be back in touch via email soon.