Aster leafhopper infests carrot, celery, lettuce, and parsley. In Ontario, the insect overwinters in the egg stage on winter grain. They might also migrate to Ontario from US. Nymphs hatch in early May and become adults about two weeks later. The adults move from winter grain to various hosts such as spring grain, grasses, vegetables and weeds. During the summer, two to five generations of leafhoppers develop on the various hosts. The adults are inconspicuous, active insects, about 3 mm long.
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