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Powdery Mildew Lifecycle

Powdery Mildew on Pinot Noir

Unfortunately we now have Powdery Mildew on the some of the Pinot Noir and a few of the Chardonnay grapes. It's quite isolated at the moment and interestingly is mainly in the rows where the FrostGuard machine was sited which prevented proper spraying earlier in the year.

Powdery Mildew is caused by the fungus Erisiphe necator. It only infects green parts of the vine and the grapes but survives over the winter in dormant buds and in the bark crevices or leaf debris on the ground.

Powdery Mildew Lifecycle

Alex is spraying the whole of Block A this morning with sulphur and potassium bicarbonate which is the standard organic treatment. It is not curative but will hopefully prevent it from spreading.