Tree pest and disease diagnosis is the process of identifying and diagnosing pests and diseases that may be present in trees or plants. From an Arboricultural perspective, this is important because it helps to ensure that trees are healthy and free from any pests and diseases that could potentially cause damage or harm to the tree or surrounding environment. For clients, tree pest and disease diagnosis can help to provide peace of mind that their trees are healthy and free from any potential harm. It also helps to ensure that any potential problems are identified and addressed in a timely manner, helping prevent any future damage or losses.