During the summer, many of us notice yellow-orange spots on the leaves of their ornamental pear trees. These spots begin in the late spring on the upper surface of leaves, approximately 1/8- to ...

Q. This picture is from the Aristocrat Ornamental Pear tree. We have five trees and all have this problem with about 75 percent of the leaves affected. Any idea what it is and will a fungicide work on ...

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 ...

Some of us are starting to notice yellow-orange spots on the leaves of their ornamental or fruiting pear trees. These spots begin in the late spring on the upper surface of leaves, approximately 1/8 ...

The sun is visiting now and then, colorful blooms are everywhere and we're feeling the urge to get outdoors. It's gardening time. Got a question? Get answers from Ask an Expert, an online question-and ...

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 ...

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.