There are various types of leafhopper that affect a wide range of plants, especially rhododendrons, roses, primulas and tomatoes. They feed on the sap of leaves, leaving a coarse, pale spotting on the upper leaf surface, and can transmit plant viruses.

Species include the rose leafhopper (Edwardsiana rosae), rhododendron leafhopper (Graphocephala fennahi) and the glasshouse leafhopper (Hauptidia maroccana). The adult rose and greenhouse leafhoppers are green or yellow insects 2-3 mm long, whereas the rhododendron leafhopper is 6 mm in length and turquoise-green and orange. The immature nymphs are creamy-white and easier to spot.

Control

When spotting is first seen, spray beneath the leaves with pirimiphos-methyl, malathion, dimethoate, permethrin or pyrethrum.