When it comes to grape growing, what you don’t see can hurt you. That’s why it’s important to stop downy mildew of grapes before the symptoms even appear. Fortunately, the new DuPont™ Zorvec™ technology offers unmatched control of this disease, providing you the opportunity to realise higher yields, better grape quality and improved productivity.
The best approach to controlling downy mildew of grapes – also called Plasmopara viticola or peronospora – is to apply a preventive application before the disease can damage the plant. In addition to destroying grapes, downy mildew can reduce the quality and yield of your harvest and cause indirect losses, such as when premature defoliation predisposes vines to winter injuries. It can take a vineyard several years to recover from severe damage.
“Fungicides are essential for grapes,” says Gianni Menotti, an enologist and agronomist in the Friuli Venezia Giulia region of Italy. “Prevention is always best.” With Zorvec™, the results of proper application speak for themselves. The ideal time to apply products containing Zorvec™ technology is early in crop development, which for grapes means the flowering and fruit set stages. The number of flowers directly correlates to the potential number of grapes. If the plant is stressed and unable to produce flowers, grape yields will be limited. Once the grapes are set, downy mildew can cause them to fall off the vine, further reducing yield.