Top diseases in roses - Powdery Mildew
February 17, 2023
means of dispersal. They are dispersed by wind, as are the ascospores. In general, powdery mildew fungi are not very resistant to water, so free moisture [...] ascospores or conidia, don’t need nutrients or water for germination. In general, the development rate of the epidemic is fastest at 18-25 °C. High relative