Early blight

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A. M. Varela, icipe
Is this a Minor Pest?
Minor Pest Title

Early blight (Alternaria solani)

Minor Pest Description

Leaf spots of early blight are circular, up to 12 mm in diameter, brown, and often show a circular pattern, which distinguishes this disease from other leaf spots on tomato.

Minor Pest What to do.
  • Use resistant varieties (e.g. "Rio Grande").
  • Use certified disease-free seeds. If using own seeds, hot water treat the seeds. For more information on Hot water treatment click here
  • Use disease-free plants.
  • Do not plant plant consecutively tomato crops on the same land.
  • Practise rotation with non-solanaceous crops (e.g. brassicas, legumes, small grains).
  • Stake and prune indeterminate varieties.
  • If disease is endemic, applied preventative sprays of copper compounds (e.g. copper hydroxide). For more information on Copper click here.
Minor Pest Position
Minor Pest Firstcontent
Pest Type
Common names; Early blight, Alternaria blight, dry blight, leaf spots, seedling blight, damping-off, collar rot, hard-rot of fruits
Host Plants
Minor Pest secondContent