Combating cotton whitefly

Environmentally friendly products and natural solutions for controlling cotton whitefly in the home, garden, or greenhouse.

1. General information about cotton whitefly (whitefly)

The cotton whitefly (Bemisia tabaci) , often simply called the whitefly , is a widespread plant pest. It primarily attacks vegetables (tomatoes, cucumbers, peppers) , ornamental plants, and greenhouse crops. The small, white-winged insects suck plant sap, significantly weakening the plant.

A severe infestation leads to:

  • Yellowed, rolled leaves
  • Growth disorders
  • Honeydew secretions that lead to black sooty mold
  • Reduced flowering and fruit formation

Whiteflies can quickly become a nuisance, especially in greenhouses and on windowsills .

2. Detecting cotton whitefly – typical signs

Typical signs of infestation:

  • Small white flies that fly up when the plant is touched
  • Yellowish larvae on the undersides of leaves
  • Sticky deposits (honeydew) on leaves
  • Black coating (sooty mold) as a result of honeydew
  • Generally weakened, yellowed plants

Since the pests are very small and reproduce quickly, early detection is particularly important.

Recommended product

With the Encarsia parasitic wasps, you rely on natural helpers that specifically control whiteflies and reliably support your plants.

  • Easy to use: The cards are simply hung directly on the affected plants – ready to use straight away.
  • Natural & safe: Parasitic wasps are useful helpers from nature and do not require any chemical additives.
  • Long-lasting support: Works over several weeks and promotes a permanently healthy plant environment.
Encarsia parasitic wasps against whiteflies Encarsia parasitic wasps against whiteflies
Encarsia parasitic wasps against whiteflies
From €14,90
€14,90 /item

3. Preventing cotton whitefly – how to protect your home and garden

With these measures you can significantly reduce the risk of infestation:

  • Check plants regularly , especially the undersides of leaves
  • Create stable air circulation in the greenhouse, avoid stagnant air
  • Avoid over-fertilization with nitrogen as it promotes infestation
  • Hang up sticky traps (yellow boards) for monitoring
  • Remove old plant remains as they often contain breeding grounds

4. GREEN GUARDIA products against cotton whitefly (whitefly)

GREEN GUARDIA Encarsia parasitic wasps

The tiny Encarsia formosa parasitic wasps are highly effective against whiteflies. They parasitize the larvae of the cotton whitefly, causing them to turn black and die. This gradually reduces the population. Ideal for use in greenhouses, conservatories, and on houseplants .

GREEN GUARDIA yellow boards

The bright yellow sticky traps attract and reliably capture adult whiteflies. They are perfect for early detection of infestations and support biological control with Encarsia parasitic wasps.

👉 The combination of Encarsia parasitic wasps and yellow tablets is the most effective method to permanently combat and simultaneously prevent cottony whitefly in the greenhouse or on houseplants.

✅ Conclusion: The cotton whitefly can cause severe damage to plants and lead to crop failure. With prevention, regular inspections, and GREEN GUARDIA products—Encarsia parasitic wasps and yellow tabs— infestations can be effectively contained and plants remain healthy.