Life history of the blue-green sharpshooter, Neokolla circellata
AuthorHenry H. P. Severin
Author AffiliationsHenry H. P. Severin was Entomologist in the Experiment Station.
Hilgardia 19(6):187-189. DOI:10.3733/hilg.v19n06p187. April 1949.
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.
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DeLong D. M., Severin H. H. P. Characters, distribution, and food plants of leafhopper vectors of virus causing Pierce’s disease of grapevines. Hilgardia. 1949. 19(6):171-86.
Hewitt W. B., Frazier N. W., Jacob H. E., Freitag J. H. Pierce’s disease of grapevines. California Agr. Exp. Sta. Cir. 1942. 353:1-32.
Severin H. H. P. Transmission of the virus of Pierce’s disease of grapevines by leafhoppers. Hilgardia. 1949. 19(6):190-206.