
Rose varieties differ greatly in their susceptibility and tolerance to downy mildew, but many of the susceptible varieties are in high demand and fetch a good market price. (Image source: Capri23auto/Pixabay)
Dr Lisbeth Riis, founder and CEO at Scarab Solutions, has explained how getting to grips with downy mildew requires preventive measures, effective scouting, early intervention and regularly executed control