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The incidence of coiled sprout in ‘Majestic’ potatoes was increased by chitting the seed, planting deeply and compacting the soil. Stem bases of plants from unchitted seed produced coiled stems only in rolled soil and then only few. Coils were most abundant with plants from chitted seed in rolled soil. Rolling the soil increased the incidence of coiling and fasciation more than did chitting. Chitted seed planted 1 in. deep produced very few coils even in rolled soil. Not all coils showed lesions but Verticillium nubilum Pethybr. was frequently isolated from lesions. [ABSTRACT FROM AUTHOR]

Red beet growing in pots, either out-of-doors in Hertfordshire or in the glasshouse, was inoculated with a pathogenic Streptomyces isolate. The plants, which become susceptible at decortication (about five weeks after sowing), became resistant after about a further two weeks. This allows a relatively short period during which a potential control measure would need to be effective. [ABSTRACT FROM AUTHOR]

This chapter describes sporulation of blight on potato tubers within ridges. A crop of Ulster Ensign, known to have a high proportion of tubers infected, was first examined on August 8, 1960, after a period of rain, and on that and subsequent occasions the fungus was found to be sporulating in tufts from the lenticels and on crumbs of soil attached to the surface of unexposed blighted tubers within the potato ridges.