What causes root and crown rots?

Root and crown rots are primarily caused by both bacteria and fungi, which thrive in conditions that allow for moisture accumulation around the base of plants. These pathogens can invade the plant tissue, leading to decay that affects the roots and crown, the part of the plant where the stem transitions to the root.

Fungus, such as Phytophthora and Pythium, are common culprits, often proliferating in overly wet or poorly drained soils. Bacterial infections can occur as well, particularly when plants are stressed or damaged, creating entry points for these microorganisms.

The processes involved in the development of root and crown rots are not caused by conditions like soil erosion, excessive sunlight, or solely improper watering techniques. While poor watering practices can indeed contribute to favorable conditions for these pathogens, they are not the sole cause. Understanding that both types of microorganisms play an essential role in the decay process highlights the importance of proper cultural practices in preventing these diseases, such as ensuring proper drainage, avoiding overwatering, and maintaining healthy soil conditions.