Powdery mildew, a disease caused by a pseudofungus, is now widespread almost everywhere in Europe. Among other things, it nests in the vines of the grape. This has serious economic consequences, but what about human health? Is it still possible to eat fruit from a plant affected by powdery mildew? Find out here.

Powdery mildew can also affect the grapes

Recognizing powdery mildew on grapes

You can recognize a powdery mildew infestation by the white spots on the upper side of the leaf (powdery mildew) or underside of the leaf (downy mildew), which turn brown or gray over time. The vines also yellow and become crooked. The symptoms are therefore quite easy to identify on the leaves, but how can you tell whether the fruits are also affected?

  • the shell hardens
  • the fruits burst open (seed breakage)
  • occasional dark spots on the fruit

Different types of powdery mildew

One distinguishes not only the real from the false powdery mildew. There are different types of pests that specialize on a plant. For example, a grape fungus only attacks grapevines and not tomato plants. While powdery mildew can be toxic on some leaves, grape fungus is relatively harmless. Winemakers also make their wine from diseased grapes.

Allergic reactions possible

Nevertheless, allergic reactions are possible when consumed, which are expressed in the following symptoms:

  • upset stomach
  • digestive problems
  • difficulty breathing
  • skin rash

Negative consequences of powdery mildew on grapes

Although powdery mildew is not poisonous, an infestation of a winery has indirect health consequences. Since powdery mildew is also very common in Germany, many winegrowers would be bankrupt if they destroyed their harvest if the fungus was found. Fortunately, the wine made from affected grapes is still drinkable, albeit with a significant loss of flavor. Nevertheless, the rapid spread is forcing more and more farmers to use pesticides, which in turn can cause physical problems in consumers.

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