The answer to 'shrub disease' is that there are several common causes, symptoms, and solutions for shrub diseases. Some of the most common issues include fungal diseases like powdery mildew or leaf spot, bacterial infections, insect infestations, and environmental stresses like drought or frost damage. Symptoms can include discolored, wilting, or dying leaves and stems, fungal growth, or insect damage.
For many minor shrub diseases, homeowners can often treat the issue themselves through proper watering, pruning, and applying fungicides or insecticides. However, for more serious or persistent problems, it's best to consult a professional landscaper or arborist who can properly diagnose the issue and recommend the most effective treatment.