‘Parsnip Canker’

Carrot Fly Injury and “Canker” of Parsnips in the West Midlands

“…This was in line with the observations of Stirrup and Roebuck (1926) that the cankers develop following fungal and bacterial invasion of wounds. Wilkinson (1952), however, has stated that Parsnip Canker in America is due to infection by Itersonilia sp., while Jones (1953) has shown that one type of canker in England is caused by Streptomyces scabies. These divergent views may be due to the different isolation techniques used by different workers, but another possible explanation is that " canker " in parsnips is not a specific disease, but a condition that may arise from a number of differing causes.…”

Taxonomie studies on streptomycetes causing potato common scab: a review

“…Streptomyce^-induced scab diseases are also found on a variety of tap root crops (Hanson & Lacy 1990, Janse 1988, Levick et al 1985, Tashiro et al 1990). However, the host range of strains causing common scab has rarely been determined (Jones 1953, Levick et al 1985. Streptomyces species are also responsible for other diseases on potato such as russet scab (Faucher et al 1993, Harrison 1962) and netted scab (Scholte & Labruyère 1985).…”

The Streptomycetes Associated With Common Scab of the Potato

“…THE STREPTOMYCETES ASSOCIATED WITH COMMON SCAB OF THE POTATO by A. P. JONES Department of Agriculture, The University, Leeds SCAB, caused by Streptomyces scabies, occurs in a variety of forms and can attack several hosts (Jones, 1953). The following investigation was to see whether pathogenic streptomycetes isolated from scab on potato, and also carrot, could be related to a single morphological type.…”