Plasmopora viticola, a causative agent for downy mildew in grapevines, is a particular type of fungus that develops in hot and humid environments. The symptoms appear as irregular chlorothic spots on the top side of leaves, which could subsequently necrotize and a powdery coating on the bottom side. The fruits are covered by a whitish powder and change color from purple to reddish brown.
Uncinula necator is the cause of powdery mildew on grapevines. In hot and humid environments, it infects all the green tissues, including leaves and young bunches. The symptoms are easily recognizable and identifiable: a white-grey powder covers the infected tissues, visible on the top side of the leaves and the fruits.
We have tested different strategies and products, both biological and chemical, in order to evaluate their effectiveness in controlling these pathogens.