sentences:  Powdery mildew is most prevalent in cool, dry years, and secondary infections also occur from wind dispersed conidia.The disease is highly polycyclic, with the pathogen life cycle from germination to conidiation taking only 9 days, and conidia infecting the plant tissues 5–7 hours after germination.Warm temperatures with cloud cover and heavy dew promote infection, though dry conditions favor disease development.