Star Magnolia sap dripping
We have a Star Magnolia in our front yard for 20-30 years. Last year it started dripping sap. We didn't check on it then, and this year it is again, even more so. Help! We read that it is magnolia scale and there is a window for treating it. Can you please help us with how to control it? Thank you!!
Montcalm County Michigan
Dripping sap is a symptom that can be caused by magnolia scale. We have started to receive reports of magnolia scale in MI, and it's possible this is the cause. I'd advise searching the tree to see if you find any scale adults (https://www.canr.msu.edu/news/check_magnolias_for_magnolia_scale_now)
There's also a possibility the sap could be due to a canker. Check here to rule out that the dripping sap does not resemble this pattern. https://ag.umass.edu/landscape/fact-sheets/phytophthora-bleeding-canker