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- ...

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 ...

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 ...

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.

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 ...

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 ...

The Bradford pear tree is particularly eye-catching as spring kicks off and its blooms pop. But get close and a whiff of its blossoms may send you running. An ornamental tree found across the U.S.