Life history of the blue-green sharpshooter, Neokolla circellata

The female deposits a single egg in a slitlike egg chamber cut in the petiole or midrib of grapevine leaves. The egg period varies from 12 to 22 days during the spring in the greenhouse. Nymphs pass through 4 to 6 molts. The average duration of the nymphal stages was 46 to 53 days on grapevines, 58 to 66 days on common alfalfa. Under natural conditions the adults acquire the winged stage during the summer, winter over, and die in the spring. At Berkeley there is usually only one generation a year, but a partial second generation may occur.