The tissue on one mine has been peeled away. The leaf on the right has a tissue-feeding mine. Please note that Provado and Agri-Mek have activity against Leafhoppers nymphs which are starting to make their appearance in the orchard. White apple leafhopper adults are pale yellowish-white while the nymphs are pale white. The insect overwinters on apple trees in the egg stage.
Eggs begin to hatch around late pink.
Nymphs and adults have stylet-type mouthparts and feed on the underside of mature apple leaves causing a stippling effect visible on the top sides of the leaves. When feeding is extensive, the leaves can appear white. The leafhoppers excrete a honeydew that can get on the fruit and cause black speckling. Nymph and adults should be monitored starting at Petal Fall. They often are found on the underside of leaves.