sentences:  Mangoes are susceptible to a large variety of pathogens, including root rot, anthracnose, die back, and leaf spot, among others.However, one of the most prevalent and damaging diseases of this crop is powdery mildew of mango, caused by "Oidium mangiferae"; crop losses between 20 and 90 percent have been reported from various regions due to powdery mildew infections.Most mango cultivars in use today were released from 1949–1967, with continuous cultivation since that time.