Common Shrub Diseases
Fire blight is caused by the bacteria Erwinia amylovora, over 130 members of the Rosaceae family are susceptible, including; apple and crabapple, cotoneaster, firethorn, hawthorn, mountain ash, and pear. Infected leaves, stems, twigs and fruits will turn brown to black. Fire blight will blacken the smooth-barked, green branches and affected twigs develop a “shepherd’s crook.” Needle,…
