How can I prevent diseases in greenhouse herb production?
The most common diseases in greenhouse herb production are fungal diseases, including botrytis, damping-off, powdery mildew, and root rots. Vascular wilts are also common in herbs. These diseases can cause tremendous plant loss in just a few days if conditions are favorable and no control is in place. Open beds, raised beds, and temporary structures such as hoop houses can prevent disease buildup from year to year due to weather exposure, whereas greenhouses — with poor air circulation, dense plant canopies, plant crowding, and high humidity — can increase the incidence of disease. Good steps in preventing disease buildup in greenhouses...