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Pest & Disease Library · Solutions

Thrips Control in Lettuce

Thrips scar lettuce leaves and, more seriously, transmit tomato spotted wilt virus, which can condemn a crop. They lodge in hearts and folds where control is difficult, so early management is essential.

Common crops affected

Why it matters

Feeding scars downgrade flowers and fruit, and their virus-vector role can exceed the direct damage; they shelter in buds so infestations build unseen.

When to act

Protect from early growth, before thrips settle into hearts.

What to look for

  • Silvery feeding scars and dark frass
  • Distorted inner leaves
  • Virus symptoms (spotted wilt)
  • Contamination and downgrade at pack-out

How to manage it

  1. Monitor with blue/yellow sticky traps; manage weeds.
  2. Spray Spider Mite Control into flowers and new growth; repeat every 3–5 days.

Recommended Vegalab program

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

RoleProductUse
Primary controlSpider Mite ControlNatural oils on thrips in flowers/new growth
Broader pressureMultiMite ControlMixed pest pressure

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

Frequently asked questions

How do I limit virus risk?

Keep thrips numbers low early and manage nearby virus reservoirs and weeds.