Aphids on tomato

Several aphid species attack tomatoes. Vectors of many viruses. Reproduce parthenogenetically. Form colonies on shoot tips.

Symptom photos

Aphids — Aphid colony on a leaf — wingless and winged individuals
Aphid colony on a leaf — wingless and winged individuals Photo: Whitney Cranshaw, Colorado State University, Bugwood.org, licence CC BY 3.0 us

Symptoms

  • Aphid colonies on shoot tips
  • Curled leaves
  • Honeydew
  • Black sooty coating

What it does to the crop

  • Growth inhibition
  • Leaf curling and yellowing
  • Inflorescence deformation
  • Honeydew and sooty molds
  • Virus transmission (CMV, PVY)

What encourages it

  • Temperature 20-25°C
  • Moderate humidity
  • Presence of weeds
  • Poor ventilation

Prevention

  • Yellow sticky traps
  • Regular inspection of tips
  • Weed destruction
  • Introduction of ladybugs and lacewings

⚠️ 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.

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