The answer to 'tree brown patches' is that there are several common causes, including drought, disease, pests, and nutrient deficiencies. Symptoms may include discolored, wilting, or dying leaves and branches. To address the issue, it's important to first diagnose the underlying cause and then take appropriate action, which may involve watering, fertilizing, pest control, or disease treatment.
If the problem is severe or you're unsure of the cause, it's best to consult a professional arborist or landscaper. They can assess the tree's condition, identify the issue, and recommend the most effective solution to restore the tree's health.