Rose leafhopper resembles the WALH in appearance, habits and tree injury. White apple leafhopper nymphs are whitish green, smaller, wingless and are usually found on the undersides of the leaves. They move quickly sideways as well as forward. If a treatment is needed, Provado at 3 to 6 fl oz may provide good control of nymphs and adults. The same Provado treatment should also provide good control of the potato leafhopper which may also be present at this time in orchards.
Nymphs tend to move sideways and quickly retreat to the opposite side of the leaf when disturbed.
Other insecticides that can be used are Lannate SP, Vydate, dimethoate, diazinon or endosulfan. Diazinon is the least toxic to Stethorus beetle. Potato leafhopper control is especially recommended in blocks with fire blight to prevent possible spread of the disease by this insect. Other insects such as white apple leafhopper and aphids have not been shown to spread fire blight. See the TFPG pages 112 and 113 for scouting procedures.