Scab on crabapple and pyracantha are leaf-spotting diseases that can cause defoliation. Botrytis flower blight occurs on annuals and some perennials during wet seasons. Anthracnose of shade trees is a blight frequently seen in Ohio on sycamores, maples, ashes and oaks. Fungi-causing tree diseases are spread by wind and splashing water. Grow resistant cultivars, maintain plant vigor, enhance leaf drying by proper pruning and water early in the day to help avoid leaf spotting and blights.
Fungicides provide protection from infection when applied before infection by fungal spores.
These diseases, which include water mold diseases, attack a wide variety of plants. They cause damage to roots and crowns of plants. Damage to some of the root system results in poor growth, yellowing or stunting of the plant. Root rot fungal pathogens are found in almost all soils. However, they do not survive as well in well-drained soils.