Pathogenicity on Avena and growth response of Pseudomonas coronafaciens (Elliott) Stapp

Abstract

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Control of Halo Blight in Oats

“…Glasshouse and laboratory tests revealed that poor establishment in the field was due to the high rate of mortality amongst infected seedlings, a large proportion of which died at the first-leaf stage before appearing above ground, a feature also observed and reported by Kingsolver (1944).…”

“…More recently Kingsolver (1944) has reported sources of field resistance. The varieties Anthony, Boone, Marion, Bannock, Gopher, Landhafer and Mutica Ukrainica, together with selections from crosses of these parents, were found to be, in general, wholly susceptible.…”

“…The cultivated varieties and other forms of Avena which gave 0 or 1 type reactions are listed in Table 3. Kingsolver (1944). t Reported as resistant by Caldwell et al (1946). }…”

Biological and Molecular Evidence that Pseudomonas syringae Pathovars coronafaciens, striafaciens and garcae are Likely the Same Pathovar

“…A bacterial causal agent of a disease of bromegrass (Reddy and Godkin, 1923) probably is also P. syringae pv. coronafaciens , because isolates from bromegrass were able to cause disease on oats (Reddy and Godkin, 1923; Kingsolver, 1944). In addition, bacteria that cause a disease of corn called ‘chocolate spot’ were originally classified as ‘ P. coronafaciens pv.…”

The Inheritance of Resistance to Halo Blight of Oats

“…Nevertheless, plant breeding offers an even cheaper and equally efficient means of control, especially as good resistance has been found in various hexaploid varieties and species (Caldwell. Mulvey and Compton, 1946;GriflRths and Peregrine, 1960;Kingsolver, 1944). Because of the possibility of combining the factors for resistance with desirable agronomic characters into one improved variety by hybridization, a knowledge of the mode of inheritance of resistance to halo blight is of great importance to the breeder.…”