Twenty-five phenotypically and genotypically similar strains of a fastidious, xylem-limited
bacterium were isolated from 10 plant disease sources including Pierce’s disease of grapevines…

Wild hosts of the Pierce's disease (PD) bacterium were identified in scattered locations in
California. The PD bacterium was found in wild riparian weeds along the Napa River and near …

Dormant cuttings of each of 25 grape cultivars were inoculated with 0.1 mL of Pierce's
disease (PD) bacterial suspension (10 8 cells/mL) in distilled water. Cuttings of each cultivar …

Most floriculture crops are propagated vegetatively. Because most viruses and viroids affecting
ornamental crops are mechanically transmitted, only a small number of infected plants in …

Brittle root (BR) horseradish from Illinois was consistently distinguished from healthy horseradish
by the dark discoloration of phloem tissue of the root of affected plants and also by the …

An antiserum was prepared in rabbits against an isolate of corn stunt spiroplasma (CSS; I-747).
The immunoglobulin of the antiserum was purified and conjugated with alkaline …

Composition of cellular fatty acids was determined for strains of fastidious, Gramnegative,
xylem-limited bacteria causing or associated with Pierce's disease of grapevine, phony …

The most obvious symptoms of the mycoplasma diseases of fruit trees are stunting, a
general yellowing of foliage, a slow or quick decline, leaf curl, a reduction in the quantity and …

MATERIALS AND METHODS Pear decline-affected Bartlett trees, which had been marked
during September-October 1979 in a commercial orchard near Placerville, CA, were the …

Several commercial Hibiscus rosa-sinensis cultivars were found to be naturally affected by
chlorotic ringspot virus in Florida. Symptoms were mottling, chlorotic spots and rings. Tests …