|Disease||About These Diseases||Crops of Special Concern|
|Root/Crown Diseases (Rhizoctonia, Thielaviopsis)||
Rhizoctonia solani, Thielaviopsis basicola (Black rot), and Fusarium species are natural soil inhabitants and persist there. Rhizoctonia is active in the upper, drier portions of the soil. Black Rot is favored by cold, wet, alkaline soils. Fusarium species can be seedborne. Control by sanitation, clean growing media, and preventive fungicide drenches.
|Black rot: Pansy, Calibrachoa|