Pathogen strains and leafhopper species as factors in the transmission of western x-disease agent under varying light and temperature conditions

Roger E. Gold and Edward S. Sylvester

Hilgardia, 1982, vol. 50, issue 3

Abstract: The data base on transmission of western X-disease agent (WXDA) by Colladonus montanus leafhoppers was expanded in studies using celery, Apium graveolens as the host. Transmission was affected or limited by the availability threshold, instar efficiency, and acquisition and inoculation rates, along with vector biotype and pathogen strain. Transmission also was moderated by circadian rhythms. Serial passage by injection of the pathogen into a sequence of healthy insects was accomplished, and some evidence was obtained that tetracycline pressure during serial passage could result in selection of a tetracydine-resistant strain of the pathogen. Leafhoppers did not become infectious by membrane-feeding during trials made to concentrate or purify the WXDA.

Keywords: Environmental; Economics; and; Policy (search for similar items in EconPapers)
Date: 1982
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