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 ...

Powdery mildew and scorched leaves are two of the most common problems Joe Pye weed is susceptible to. Hardy in zones 4 through 8, Joe Pye weed can be a surprisingly aggressive spreader ...

When it comes to one of the country’s most popular perennial plants, the “big four” vexations are powdery mildew, black spot, rust and aphids, according to Jay Pscheidt, a plant pathology ...