sentences:  Atmospheric temperatures of 10-31 degrees Celsius are the optimum for development of the disease on mango trees.Disease development is inversely proportional to the number of hours of sunshine per day, and moderate to high relative humidity also plays a role in the severity of infections.Powdery mildew infections show a characteristic white or gray powdery growth on various plant surfaces, including leaves, flower scales, buds, axils, stalks, and fruits.