They feed on the surface cells of leaf tissues, eating their way across the leaf. What they look like Only a few millimetres in length, these small winged insects are found in large numbers. They are very similar to whitefly, but smaller and often have a darker coloured body. The upper surface of leaves are left silvery-white or yellow, with a mottled or blotchy appearance. Occasionally petals are also attacked.
Plants are often affected in the bud stage and distortion of the plant can follow.
Regular watering is also a useful control measure, so check plants daily during hot, dry weather conditions. Their favourite plants Gladioli, iris, privet, roses and peas.