which means dealing with the usual diseases and pests earlier, too. When it comes to one of the country’s most popular perennial plants, the “big four” vexations are powdery mildew ...

Powdery Mildew (PM) is a fungal leaf disease caused by Blumeria graminis , which can reduce grain yield and quality in cereal crops. B. graminis species can be subdivided into Formae specialis groups ...