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Pest & Disease Library · Solutions

Leafminer Control in Tomato

Leafminer larvae tunnel between tomato leaf surfaces, leaving winding white trails that reduce photosynthesis and, in heavy infestations, cause leaf collapse. They’re a persistent greenhouse pest with fast generations.

Common crops affected

Why it matters

Mining reduces vigour and, on leafy and ornamental crops, the cosmetic damage alone makes the crop unsellable; several generations occur in warmth.

When to act

Act at early mining; target larvae and disrupt the cycle.

What to look for

  • Winding, pale serpentine mines in leaves
  • Stippling from adult feeding punctures
  • Premature leaf death under heavy mining
  • Fast build-up in protected culture

How to manage it

  1. Remove mined leaves; protect parasitic wasps.
  2. Spray Larva Control when adults and young larvae are active; rotate with Larva BioControl.

Recommended Vegalab program

A registered Vegalab encapsulated insecticide for leafminers — see the Product Finder; zero PHI and zero REI.

RoleProductUse
Primary controlLarva ControlOxymatrine larvicide; 0-hr REI
Rotation partnerLarva BioControlBiological larvicide

Product claims, rates, and availability vary by jurisdiction; always follow the applicable label.

Frequently asked questions

Do the mines keep growing after control?

Existing mines remain visible, but controlling larvae stops new damage and protects the canopy.