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in : Problems: Flowers
Yellow to white mottling of upper surface of leaves. Whole leaf may become puckered and turn brown at the edges.
Adult and immature leafhoppers suck sap from the leaves of plants and cause mottled discolouration. The 3mm-long adults readily spring from the leaves when disturbed. The pest usually overwinters as eggs laid on the plant. These hatch in spring and go on to produce several generations of the pest in a single season. Individual leafhopper species are specific to particular plants or groups of plants. Although most plants are able to survive an attack, leafhopper feeding leaves unsightly marks on foliage.
Cover a piece of stiff card with grease or contact adhesive and hold it above the infected plants while lightly brushing the foliage with your other hand. The disturbed leafhoppers should become stuck to the card and can then be disposed of. Alternatively, spray with organic pesticides based on pyrethrum in spring and summer.
In spring and summer, use a pesticide containing thiacloprid.