Grapevine downy mildew control in organic farming

Area of Science:

• Agricultural Science
• Plant Pathology
• Organic Farming

Background:

• Downy mildew (Plasmopara viticola) is a significant threat to organic viticulture.
• Effective and sustainable disease management strategies are crucial for organic vineyards.

Purpose of the Study:

• To evaluate the efficacy of reduced-dose cupric products and alternative compounds for controlling downy mildew in organic vineyards.
• To assess the performance of these treatments against Plasmopara viticola.

Main Methods:

• Field trials were conducted in an organic vineyard setting.
• Cupric products at reduced dosages and various alternative compounds were applied.
• Disease incidence and severity were monitored to assess treatment efficacy.

Main Results:

• Copper compounds demonstrated satisfactory control of downy mildew.
• Reduced application rates of copper metal were achieved without compromising efficacy.
• Alternative compounds tested were not effective in controlling Plasmopara viticola.

Conclusions:

• Low-dose copper products are a viable and effective solution for managing downy mildew in organic vineyards.
• Further research into alternative, non-copper-based treatments is needed for sustainable Plasmopara viticola control.