Produce honeydew which encourages sooty moulds to develop on the plant.
Tiny Whiteflies can be found on the underside of the leaf, of many indoor and glasshoues plants. Also on some vegetables and fruit plants in the summer months.
Adult are tiny white winged flies 2mm long in length and will fly up on mass when a affected plant is disturbed. Eggs are laid by the adult fly onto the underside of the leaf and are tiny white to cream in colour and often laid in a circle. The young nymphs are flat and scale like, light green in colour, and are immobile. As nymph ages and develop, in its final stages it becomes enlarged and the adult fly hatches out.
Tiny white winged insects fly off the plant when disturbed. Sticky honeydew can be found on the upper-surface of the leaf, which may be colouring grey from sooty mould development.
-Remove and depose of damaged plants and infected leaves.
-Encourage Whitefly predators, Lacewings, ladybirds.
-Biological control of Encarsia formosa, a parasitic wasp can be used in glasshouse situations
Check with your local Garden Centre
Attracts this pest
Whitefly is attracted to the colour yellow. Yellow sticky card, hung above the plants may help reduce numbers, but also allows the ability to identify the level of infestation.