What primarily causes plant diseases?

Fungi are among the most significant causes of plant diseases due to their diverse and adaptive nature. These microorganisms can invade various plant tissues, leading to a wide array of diseases that can affect the overall health, growth, and yield of plants. Fungi thrive in moisture and can reproduce rapidly under conducive environmental conditions, spreading quickly through spores.

Plant diseases caused by fungi include common issues such as root rot, blights, and powdery mildew. Fungal infections can be particularly challenging because they not only harm individual plants but can also spread to others in the vicinity, leading to widespread outbreaks. Understanding the role of fungi is essential for effective disease management and prevention strategies in horticulture and agriculture.

While other pathogens like bacteria, viruses, and insects can also cause plant diseases, fungi represent a significant portion of these issues, often warranting focused attention from arborists and plant health professionals.