Fungal
moderate
Anthracnose
Sunken spots with dark margins on shoots and berries — the classic "bird's-eye rot".
Leaves
25 problems can affect the leaves of your grapevine. Filter by type, or open one to compare symptoms and treatments.
Fungal
high
Black rot
Tan leaf spots ringed with black dots, and berries that shrivel into hard black mummies.
Fungal
high
Downy mildew
Yellow "oil spots" on top of the leaf with white fuzz underneath — loves wet, warm weather.
Fungal
high
Esca (trunk disease)
A chronic wood rot of older vines, showing as "tiger-stripe" leaves and sudden collapse.
Insect / pest
low
Grape erineum mite
A microscopic blister mite that raises fuzzy welts on leaves — alarming but rarely harmful.
Insect / pest
moderate
Grape leafhopper
Small hoppers whose feeding stipples leaves white; heavy numbers scorch the canopy.
Insect / pest
moderate
Grape mealybug
Soft, waxy sap-suckers that foul clusters with honeydew — and spread leafroll virus.
Insect / pest
high
Grape phylloxera
A tiny root-feeding aphid-like insect that devastates own-rooted European grapes.
Fungal
moderate
Grape rust
Bright orange pustules that dust the underside of leaves, causing early leaf drop in warm regions.
high
Grapevine fanleaf virus
A nematode-spread virus that deforms leaves into a fan shape and leaves the crop straggly.
moderate
Grapevine leafroll
Autumn leaves that roll downward and turn deep red or yellow while the veins stay green.
moderate
Grapevine red blotch
Red blotches on leaves that mimic leafroll but mainly delay ripening and lower sugar.
Disorder
moderate
Herbicide drift
Distorted, cupped, fan-shaped new growth from weed-killer that drifted onto the vine — not a disease at all.
Disorder
moderate
Iron deficiency
Yellowing of the youngest tip leaves with green veins — usually a high-pH soil problem, not a lack of iron.
Insect / pest
moderate
Japanese beetle
Metallic beetles that skeletonise leaves, chewing the tissue between the veins into lace.
Disorder
low
Magnesium deficiency
Yellowing between the veins of older leaves while the veins stay green — one of the commonest grape disorders.
Disorder
low
Nitrogen deficiency
Uniformly pale, small leaves and weak growth from too little nitrogen — the vine simply lacks vigour.
Fungal
moderate
Phomopsis cane & leaf spot
Black specks and cracked bark on the base of shoots, plus small spots on lower leaves.
Bacterial
high
Pierce's disease
A bacterium spread by sharpshooter insects that clogs the vine's plumbing and kills it over 1–3 years.
Disorder
moderate
Potassium deficiency
Scorched, curling leaf margins on older leaves and poorly ripening fruit — a heavy-cropping vine's shortfall.
Fungal
high
Powdery mildew
A dusty white-grey coating on leaves and berries — the most common grape fungus almost everywhere.
Insect / pest
moderate
Spider mites
Tiny sap-sucking mites that stipple and bronze leaves in hot, dusty, dry conditions.
Insect / pest
high
Spotted lanternfly
An invasive planthopper that swarms vines, sucking sap and coating them in sticky honeydew and sooty mould.
Disorder
moderate
Sunburn & sunscald
Heat and intense sun scorching exposed berries and leaves — often triggered by over-thinning the canopy.
Disorder
moderate
Zinc deficiency
Small "little leaf" growth and straggly, shot-berry clusters — a look-alike for fanleaf virus.
No problems match — try a different search or filter.