Problems with grapes
Identify what's wrong by where it appears and what you can see.
Where is the problem?
Start by selecting the part of the plant where you see the problem.
Start with the symptom
Or pick from the symptoms most often seen on grapes.
Common problems with grapes
The problems recorded on grapes, the most common first.
13 problems
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Grey mould (botrytis)
Fuzzy grey mould on fruit, flowers and damaged leaves, rotting them in cool, damp weather. -
Powdery mildew
A white, powdery coating on leaves that spreads in dry weather, weakening the plant. -
Cold and frost damage
Blackened, glassy shoots after a cold night. Tender plants collapse; hardy ones grow out of it. -
Downy mildew
Yellow, angular patches on top of leaves with grey-purple fuzz underneath. -
Magnesium deficiency
Yellow between the veins of older leaves, veins still green. Common on tomatoes. -
Weedkiller damage
Twisted, cupped, fern-like new growth after spray drift or contaminated manure. -
Poor pollination
Flowers but no fruit, or small, misshapen fruit that shrivels at the tip. -
Birds
Torn, stripped brassica leaves, pecked fruit, and seeds or seedlings pulled from the soil. -
Caterpillars
Holes chewed in leaves, often down to the veins, with green droppings below. -
Fruit flies
Small holes in ripening fruit, then soft, collapsing flesh with tiny maggots inside. -
Leafhoppers
Pale stippling on leaves and small insects that hop sideways when disturbed. -
Scale insects
Brown or white bumps stuck to stems and leaf veins, with sticky leaves below.
