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Occurrence of Spiroplasma citri in periwinkle in California

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Authors

A.L. Granett, University of California
R.L. Blue, University of California
M.K. Harjung, University of California
E.C. Calavan, University of California
D.J. Gumpf, University of California

Publication Information

California Agriculture 30(3):18-19.

Published March 01, 1976

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Abstract

Not available – first paragraph follows: Citrus stubborn disease is a serious economic problem in California, in Southwestern United States, and in other arid citrus areas of the world. Knowledge of the disease has rapidly increased since 1969 when a mycoplasma-like organism was found by electron microscopy in thin sections of diseased leaves. In 1970, a mycoplasma, now named Spiroplasma citri, was cultured from diseased citrus tissue. Further research has revealed that two leafhoppers (see California Agriculture, November 1973) can transmit the stubborn disease organism. Cultured spiroplasma have been fed or injected into these insects and they, in turn, have transmitted stubborn to healthy citrus seedlings. More recently (see California Agriculture, February 1975), one of the insects, Scaphytopius nitridus, fed on diseased citrus trees was shown to transmit a severe disease to healthy Vinca rosea L., periwinkle plants, in controlled greenhouse experiments. This information prompted our investigating the possibility of natural spread of stubborn into periwinkle plants.

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Author notes

This research was supported in part by a grant from the California Citrus Advisory Board

Occurrence of Spiroplasma citri in periwinkle in California

A.L. Granett, R.L. Blue, M.K. Harjung, E.C. Calavan, D.J. Gumpf
Webmaster Email: wsuckow@ucanr.edu

Occurrence of Spiroplasma citri in periwinkle in California

Share using any of the popular social networks Share by sending an email Print article
Share using any of the popular social networks Share by sending an email Print article

Authors

A.L. Granett, University of California
R.L. Blue, University of California
M.K. Harjung, University of California
E.C. Calavan, University of California
D.J. Gumpf, University of California

Publication Information

California Agriculture 30(3):18-19.

Published March 01, 1976

PDF  |  Citation  |  Permissions

Author Affiliations show

Abstract

Not available – first paragraph follows: Citrus stubborn disease is a serious economic problem in California, in Southwestern United States, and in other arid citrus areas of the world. Knowledge of the disease has rapidly increased since 1969 when a mycoplasma-like organism was found by electron microscopy in thin sections of diseased leaves. In 1970, a mycoplasma, now named Spiroplasma citri, was cultured from diseased citrus tissue. Further research has revealed that two leafhoppers (see California Agriculture, November 1973) can transmit the stubborn disease organism. Cultured spiroplasma have been fed or injected into these insects and they, in turn, have transmitted stubborn to healthy citrus seedlings. More recently (see California Agriculture, February 1975), one of the insects, Scaphytopius nitridus, fed on diseased citrus trees was shown to transmit a severe disease to healthy Vinca rosea L., periwinkle plants, in controlled greenhouse experiments. This information prompted our investigating the possibility of natural spread of stubborn into periwinkle plants.

Full text

Full text is available in PDF.

Author notes

This research was supported in part by a grant from the California Citrus Advisory Board


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