Rapid Detection of Exocortis in Citrus

Authors

E. C. Calavan
E. F. Frolich
J. B. Carpenter
C. N. Roistacher
D. W. Christiansen

Authors Affiliations

E. C. Calavan is Professor, Department of Plant Pathology, University of California, Riverside; E. F. Frolich is Laboratory Technician IV, Department of Plant Biochemistry, U. C., Los Angeles; J. B. Carpenter is Plant Pathologist, Crops Research Division, ARS, USDA, Indio; C. N. Roistacher is Laboratory Technicians, Dept. of Plant Pathology, U. C., Riverside; D. W. Christiansen is Laboratory Technicians, Dept. of Plant Pathology, U. C., Riverside.

Publication Information

Hilgardia 19(1):8-10. DOI:10.3733/ca.v019n01p8. January 1965.

PDF of full article, Cite this article

Abstract

Exocortis in citrus—an increasing problem for California growers—has emphasized the need for a rapid-indexing method for periodic testing of trees used as sources of budwood. Detection of this disease in symptomless citrus trees by field-indexing on sensitive indicator rootstocks has previously required from one and one half to more than five years. The practical method of indexing exocortis in glasshouse plants reported here caused symptoms to develop within one to five months.