Whitefly are tiny winged insects which are similar to aphids in the damage they can cause to plants. 

What do they do?

Whitefly eat the sap in plants, fruit and vegetables. This causes yellowing to the plant and the foliage to become disfigured. Whitefly and their nymphs also create a sticky substance (honeydew) that sits on the leaves and stems of plants, making the area sticky and eventually creating sooty mould. 


  • Whitefly are usually visible. Check shoot tips, flower buds and the underside of younger leaves.
  • Leaf yellowing and distorted growth
  • Sticky, clear substance (honeydew) on leaves, stems and fruit. 
  • Black mould on leaves and stems caused by honeydew.

How to treat

Non Chemical 

  • Cultural - Monitor susceptible plants and be ready to implement control methods when necessary. 
  • Physical - hanging sticky tape above plants can help catch these flying insects and notify you before they create an infestation. 
  • Biological - Encourage natural enemies in the garden (spiders, ladybirds, hoverfly and lacewing larvae)


Many insecticides can be used to counter the effects of whitefly, always make sure you read the label before applying. Plants in flower should not be sprayed due to the danger to pollinating insects, such as bees. We recommend: