Q. Our hawthorn tree is generally filled with beautiful fruits in early winter, but this year the fruits have poor color and are covered with a crusty substance. Do you know what might be causing this ...

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 ...

After last season’s drought, I know I shouldn’t complain about rain but come on — give me a break! The earlier part of this past week has been brutal if you prefer the sun. However, we need the water ...

Cedar-apple rust is one of several plant diseases that are all caused by different species of a fungus called gymnosporangium. All of these diseases are referred to as gymnosporangium rust diseases.

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 ...

Q: I planted a ‘Winter King’ hawthorn tree 5 years ago and was looking forward to the beautiful red winter fruits. But it is looking worse each year. The leaves come out in spring green enough but ...

Our often-wet springs bring with them the perfect conditions for many plant diseases. While moist weather can create conditions for diseases on many plants, sick trees in the landscape tend to draw ...