Abstract
Typhlocyba pomaria McA., the white apple leafhopper, a pest of apple in Canada and the United States, has two generations a year in the Vineland district of Ontario. The insect spends the winter in the egg stage, the newly hatched nymphs make their appearance in May, and adults are present on the trees in June and July. Summer eggs are deposited chiefly in the midribs of the foliage, and take from 20 to 64 days to hatch. The second generation of adults matures in August and September. Detailed information on all phases of the life history is presented, including the type of feeding and nature of the injury produced on apple foliage. The associated species of leafhoppers which cause injury to apple are listed.
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