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Pest & Disease Library · Solutions

Whitefly Control in Cucumber

Whitefly thrives on cucumber in warm greenhouses, stunting plants, fouling leaves with honeydew and spreading viruses. Their rapid life cycle means small infestations become crop-wide quickly.

Common crops affected

Why it matters

They sap vigour and spread viruses, and breed continuously in warmth so populations escalate fast without intervention.

When to act

Scout from early crop; act at low numbers and stay ahead of the cycle.

What to look for

  • White adults rising in clouds when disturbed
  • Nymphs and eggs on leaf undersides
  • Sticky honeydew and sooty mould
  • Weak growth and virus symptoms

How to manage it

  1. Use yellow sticky traps; quarantine new plants.
  2. Remove heavily infested lower leaves.
  3. Spray Spider Mite Control on leaf undersides; repeat every 3–5 days.

Recommended Vegalab program

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

RoleProductUse
Primary controlSpider Mite ControlContact control of soft-bodied pests
Broader pressureMultiMite ControlMixed pest pressure

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

Frequently asked questions

How do I keep numbers down all season?

Start early, treat undersides on the label interval, and combine with monitoring and sanitation.