Black Rot
Black rot is a vineyard blight that usually occurs early in the growing season. It forms in the spring as new shoots are growing and the weather is rainy and damp.
The effect of Black Rot on Vineyards
Fungicides are applied every 10 days or so during this susceptible time for the vine. While vines are usually affected early in the growing season, untreated black rot really causes its damage later.
It is particularly a problem in wet climates. Vines are prone to many mildews and diseases after being wet for 8-10 hours. When the leaves and shoots are young, they are especially sensitive to damp conditions.
Untreated black rot can ruin a harvest and growers are very concerned with taking steps to prevent it through fungicide application. Unfortunately, black rot can develop a resistance to these fungicides and they must be used sparingly to be effective.
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