Hopper Typhlocyba pomaria McAtee Leafhoppers which attack apples are found across Canada. They include the apple, the white apple, the rose and the potato leafhopper. The nymphs and adults feed on the sap in the underside of leaves, resulting in diminished plant vigor.
Infested foliage becomes pale in color, with white spots on the underside.
Potato leafhoppers often feed on apple tree nursery stock, producing hopper burn which results in curled leaves. The fruit may also be damaged, the result of spotting caused by the insects' excrement. Adults become active early in the spring and mate soon after. When the leaves appear on the trees, the females lay their eggs in the veins and stems of the leaves. The greenish-white and wingless nymphs mature about midsummer, molt and become adults .