DEAR JESSICA: I have a question about your column of Aug. 19, where you mention that the fungus that causes rust disease can be cured by getting rid of junipers, which host the fungus. I have two ...

DEAR JESSICA: We have a beautiful weeping cherry on our front lawn, but its leaves are dropping, brown and curled. My husband found some pinkish/reddish “gunk” on a part of the tree, scraped it off ...

After 20 years, suddenly our ornamental pear trees (not Bradford but “Aristocrat”) are dropping leaves with red and black spots. What can we do? This is a new rust disease called pear trellis rust.

Fall is here and all of those end-of-season projects are looming. If you’ve got questions, turn to Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension Service.