Citrus diseases refer to a group of plant diseases that affect citrus trees and can cause damage to fruit production, quality, and overall tree health. These diseases can be caused by various pathogens such as bacteria, fungi, and viruses, as well as environmental factors like temperature and humidity. Common citrus diseases include citrus canker, citrus greening (huanglongbing), citrus black spot, citrus tristeza virus, and citrus scab. Management strategies for citrus diseases often involve cultural practices, use of resistant varieties, and chemical treatments. Researchers in this field work to understand the causes of citrus diseases, develop effective control methods, and improve the overall health and productivity of citrus crops.