Tomato diseases

Every guide

• Bacterial Spot High Bacterial Small water-soaked spots on leaves that turn dark brown to black. Spots may have a yellow halo and often cluster at leaf edges
• Bacterial Wilt High Bacterial Sudden wilting of leaves during the heat of the day, often recovering slightly at night at first. Rapid, permanent wilting and collapse of the whole plant while leaves…
• Late Blight High Fungal Irregular greenish, water-soaked spots on leaves that quickly enlarge. Spots turn brown to purplish-black and may have a pale halo
• Septoria Leaf Spot High Fungal Many small (3 to 6 mm) circular spots with dark brown margins and grey-to-tan centres. Tiny black dots (pycnidia) visible in the spot centres with a hand lens
• Target Spot High Fungal Small necrotic leaf spots with light-brown centres and darker margins, often with a yellow halo. Faint concentric rings may form in larger spots (target-like)
• Tomato Early Blight High Fungal Small dark brown to black spots on older, lower leaves first. Spots enlarge and develop concentric rings like a bull's-eye or target
• Tomato Fruitworm (Helicoverpa) High Pest Round bore-holes in fruit, often near the stem end, with dark frass (droppings). Caterpillars found inside fruit or feeding on leaves and buds
• Tomato Mosaic Virus (ToMV) High Viral Mottled light and dark green pattern (mosaic) on leaves. Leaves curled, malformed, fern-like, or reduced in size
• Tomato Russet Mite High Pest Greasy bronze or rust-coloured discolouration on stems and lower leaves. Lower leaves dry, curl, and die, with damage progressing upward
• Tomato Yellow Leaf Curl (TYLCV) High Viral Young leaves turn yellow, especially along the edges. Leaflets curl upward and inward and become smaller
• Two-Spotted Spider Mite High Pest Fine pale or yellow stippling (tiny flecks) on leaves, worst on the underside. Fine silk webbing on leaf undersides and between leaves in heavy infestations
• Alternaria Leaf Spot / Stem Canker (A. alternata) Medium Fungal Dark brown to black leaf spots, sometimes with concentric rings, hard to tell apart from early blight. Dark, sunken cankers with concentric rings on stems near the soil…
• Blossom-End Rot Medium cat_nutrient_deficiency A small water-soaked spot at the blossom (bottom) end of the fruit. The spot enlarges into a sunken, dark brown to black, leathery patch
• Leaf Mold Medium Fungal Pale green to yellow spots with no clear edges on the upper surface of older leaves. Velvety olive-green to brown mould on the underside directly below the spots
• Viral Disease (unspecified / virosis) Medium Viral Mosaic or mottling (light and dark green patches) on leaves. Leaf curling, distortion, fern-like or reduced leaves
• Healthy Tomato Low Healthy plant Leaves uniformly green with no spots, blotches, or yellowing. Stems firm and upright with steady new growth