Whats wrong with my leaves

You can often distinguish a healthy plant from an unhealthy plant by its leaves, as they are usually the first to show symptoms of pests and diseases. Sometimes, however, changes in leaf appearance may be a result of changes in temperature, and are no cause for concern.

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Holes, dark spots, or brown patches present on leaves

Leaves show dark spots

Fast-spreading brown patches on leaves, stems, and fruits

Fast-spreading brown patches on leaves, stems, and fruits

Total defoliation or chewed leaves

Leaves are curled, distorted, or turning yellow

Leaves curling upward

Leaves discolored and plant growth stunted

Older leaves yellowing, but leaf veins may remain green

Small, white flies fly up if disturbed

Older leaves yellowing, but leaf veins may remain green

Spots often have concentric rings with a faded yellowing around them, particularly on lower leaves

Spots often have a thin circle of bright yellow surrounding them

Spots often have concentric rings with a faded yellowing around them, particularly on lower leaves

Spots often have a thin circle of bright yellow surrounding them

CAUSE and TREATMENT

Early blight (Alternaría species) is a fungal infection - Remove and destroy all affected leaves immediately

Bacterial leaf spot - Remove all affected leaves and avoid wetting other foliage during watering

Late blight (Phytophthora infestans) - Destroy affected plants; use copper-based fungicide as preventative spray

Tomato hornworm (of five-spotted hawkmoth) - Pick off pests or use biological control (Bacillus thuringiensis)

May be sign of leaf roll virus, but usually a result of cold nights - Will not affect the plant's growth

Viruses such as tomato mosaic virus or curly top virus - Destroy affected plants and control aphids

Magnesium deficiency - Apply magnesium sulphate (Epsom salts) as a dilute solution to plant leaves vaporariorum) - Use sticky traps or biological control (Encarsia formosa)

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