🍅 Tomato diseases — identify them by photo

An atlas of the 19 most common tomato diseases, pests and nutrient deficiencies. Compare the symptom photos with what you see on your plant, then open the full description.

Identify it by photo

Click the photo that looks closest to the problem on your plant.

Pepino mosaic — Fruit — uneven colouring, yellow-orange marbling Pepino mosaic Potato virus Y on tomato — Leaf — ring spots and mosaic along the veins (PVY symptoms) Potato virus Y on tomato Bacterial canker of tomato — Fruit — small spots with a pale halo, known as bird's-eye spots Bacterial canker of tomato Bacterial speck of tomato — Leaf — tiny black, angular specks scattered over the blade Bacterial speck of tomato Late blight — Leaf — patch of rot with a paler, sporulating margin Late blight Septoria leaf spot — Leaf — small dark spots with yellowing of the blade between them Septoria leaf spot Powdery mildew — Leaves densely covered in white, powdery growth Powdery mildew Aphids — Aphid colony on a leaf — wingless and winged individuals Aphids Tomato leafminer — Adult tomato leafminer moth — grey-brown, about 6 mm Tomato leafminer Blossom end rot — Fruits cut in half — dry, brown-black rot at the blossom end Blossom end rot Early blight — Leaf — lesions zoned in concentric rings Early blight Leaf mold — Leaves — diffuse yellow patches seen on the upper side of the blade Leaf mold Fusarium wilt — Whole plant — leaves dried up from the bottom while the fruits are still green Fusarium wilt Spider mites — Leaves — fine, pale stippling where cell sap has been sucked out Spider mites Potassium deficiency — Leaf — yellowing and browning margins on older leaves Potassium deficiency Calcium deficiency — Green fruits — dark, sunken patch at the tip Calcium deficiency Bacterial canker of tomato — Ripe fruit — bird's-eye spots with a pale halo Bacterial canker of tomato Bacterial speck of tomato — Leaf against the light — specks merging into larger black necrotic patches Bacterial speck of tomato Late blight — Fruits — firm, brown patches of rot on green tomatoes Late blight Septoria leaf spot — Whole leaf — many small spots with a dark margin Septoria leaf spot Powdery mildew — Whole plant — mildew on the leaves around the set fruits Powdery mildew Blossom end rot — Ripe fruit — dry, leathery patch at the tip Blossom end rot Early blight — Stem — brown lesion covered in spores Early blight Leaf mold — Leaf underside — olive-brown, velvety layer of spores Leaf mold Potassium deficiency — Fruit — uneven ripening, green-yellow blotches Potassium deficiency Bacterial canker of tomato — Green fruit — white spots with a dark centre Bacterial canker of tomato Late blight — Shoot — curling, browning leaves with grey mould Late blight Septoria leaf spot — Leaves — brown spots merging into larger necrotic patches Septoria leaf spot Powdery mildew — Leaves side by side — one healthy, one covered in white growth Powdery mildew Early blight — Leaves — dark spots with a distinct yellow halo Early blight Late blight — Early stage — a single grey-green patch on the leaf blade Late blight Powdery mildew — Stems — greyish-white growth covering the shoots Powdery mildew Early blight — Fruits — sunken, zoned rot next to the stalk Early blight Late blight — Leaf — greasy grey-green patches with white mould underneath Late blight Late blight — Truss — brown rot of the fruits and dying leaves Late blight Late blight — Fruit — advanced rot covered in white mycelium Late blight Late blight — Fruit — greasy brown-green patch (two views) Late blight Late blight — Fruit — extensive, marbled patch of rot Late blight Late blight — Fruit on the plant — dark brown patch of rot Late blight Late blight — Stem — dark brown rot girdling the shoot Late blight Late blight — Truss — brown patches on ripening fruits Late blight Late blight — Truss — sporulating fruit rot and dried-up leaves Late blight Late blight — Leaves — extensive brown necrosis with yellowing Late blight

All diseases

Pepino mosaic Pepino mosaic Small yellow spots on leaves Potato virus Y on tomato Potato virus Y on tomato Necrotic spots on top parts of young plants Tomato mosaic Blurred light and dark green spots on leaves (mosaic) Bacterial canker of tomato Bacterial canker of tomato Wilting intensifying at high temperatures Bacterial speck of tomato Bacterial speck of tomato Small round watery spots on leaves Late blight Late blight Dark green, watery, then browning spots on leaves Septoria leaf spot Septoria leaf spot Numerous small, first yellowish, then brown-gray spots on leaves Powdery mildew Powdery mildew Small round spots on upper leaf surface Aphids Aphids Aphid colonies on shoot tips Tomato leafminer Tomato leafminer Irregular mines in leaves Blossom end rot Blossom end rot Dark, watery spot on fruit blossom end Early blight Early blight Brown spots zoned into concentric rings Leaf mold Leaf mold Diffuse, pale yellow patches on the upper leaf surface Fusarium wilt Fusarium wilt Leaves wilting during the day and partly recovering at night Spider mites Spider mites Fine, pale stippling and mottling on the upper leaf surface Nitrogen deficiency Even pale-green, then yellow coloring across the whole leaf blade including the veins Phosphorus deficiency Purple-violet discoloration on the leaf underside, especially along the veins Potassium deficiency Potassium deficiency Older, lower leaves drying and browning around the edges (marginal scorch) Calcium deficiency Calcium deficiency A dark, watery, sunken patch at the bottom of the fruit (blossom end rot)

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⚠️ Before you reach for a spray

This atlas is informational and still growing — different diseases can look almost identical. Confirm the diagnosis and read the product label before applying any plant protection product. If you are unsure, ask your local extension or advisory service.

Keep the disease atlas with you in the garden

In the app you can identify a disease from photos, work out the spray dose for your own bed and log the treatment in your task calendar. Free, no sign-up, works offline.

Open the atlas in the app →

Diseases of other vegetables

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