The two main pathogens on grapevine are Plasmopara viticola (downy mildew) and Uncinula necator (powdery mildew). The aim of this field is to show and compare all fungicide strategies against these diseases.

Plasmopara viticola, causal agent of grapevine downy mildew, is a particular “fungus” which develops in warm, moist and humid environment. Symptoms include irregular yellow spots on the top surface of the leaves (they can turn brown due to necrosis) and white dusty spots on the bottom part of them. On bunches, the fruits become covered with white/gray dust and they change their color from purple to reddish brown.

Uncinula necator causes powdery mildew of grape. In warm and moist environments, it infects all green tissues including leaves and young berries. Symptoms are widely recognizable and easily identifiable: a gray-white dust covers the infected tissue, visible on the top part of the leaves and on bunches.

Strategies of different AgroChemical companies will be evaluated for the control of both pests.

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