Top diseases in roses - Powdery Mildew
February 17, 2023
production, so the net effect of the RH is very small. Wind and draught in greenhouses promote disease. In greenhouses, the dispersal of spores over small distances [...] mildew is a fungal disease that is caused by many different genera of fungi such as Erysiphe, Podosphaera, Oïdium, Leveillula . The main culprit in roses [...] germination. In general, the development rate of the epidemic is fastest at 18-25 °C. High relative humidity (RH) promotes the germination of spores but