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The case of rotty Irises. An amateur's observations of Iris susceptibility and resistance to soft-rot; other reflections of the Iris year

The case of rotty Irises. An amateur's observations of Iris susceptibility and resistance to soft-rot; other reflections of the Iris year

Bull. Amer. Iris Soc 76: 64-78

This is a report of observations made on the varietal reaction of over 500 bearded irises to rhizome rot (Erwinia carotovora). Among the 266 varieties classed as resistant, 27 per cent. were found on analysis to have a collective susceptible ancestry of 27 per cent., the corresponding figure for 237 susceptible varieties being 41.

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