When it comes to powdery mildew control, each year and each vineyard is different. Effective spray programs need to reflect the many factors which can influence the development of powdery mildew. These factors include varietal susceptibility, type of grape, stage of vine growth, foliage density, disease resistance from previous programs, local weather conditions and overall disease pressure in the vineyard. A Number of Application Max. Use higher rates in post-bloom sprays or heavy disease pressure.
Application numbers vary with disease pressure.
Do not exceed maximum interval. Initial powdery mildew infections can begin with the earliest growth. The severity of disease pressure may not be known until several weeks into the season. Sulfur can be tank mixed or used alone as part of a spray schedule to avoid the use of a single type of chemical for disease control. All parts of the vine and bunches must be covered by each spray application.