Life Cycle: Overwinter as eggs in bark of trees. Nymphs of the first generation can be present from late April to mid-June. Most adults migrate to summer hosts while a few stay on the trees. At least three generations per year. Monitoring: Use limb taps beginning at pink or early bloom to monitor presence during growing season. Hosts: Pear psylla, mites, aphids. Comments: Nymphs are yellow to light green in colour and move quickly. They resemble aphids that are green and sedentary, and leafhopper nymphs that are white to pale yellow, narrower in shape, have an upward curved back end, and move slightly sideways when running. Body length: Adult - 3.0mm; Mature nymph - 2.5mm
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