Pear rust is an extremely common pear problem that affects both ornamental and fruiting pear trees. The disease is called cedar-hawthorn rust and often causes only aesthetic damage in the form of 1/8- ...

Cedar apple rust is a fungal pathogen that gets its name from a life cycle infecting cedar trees, then plants in the Rose family and back again. This year, spring weather conditions promoted the ...

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 ...

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.

Last year my Bradford pear’s leaves were covered with rust fungus. What can I do this year to prevent that from happening again? CS You are correct. It seems like rust disease was everywhere last ...

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 ...