New Zealand Journal of Crop and Horticultural Science abstracts
Evaluation of Allium germplasm for susceptibility
to foliage bacterial soft rot caused by Pseudomonas marginalis
and Pseudomonas viridiflava
P. J. WRIGHT
D. G. GRANT
New Zealand Institute for Crop & Food
Research Limited
Cronin Road, RD1
Pukekohe, New Zealand
Abstract Eighty-five accessions of 33 species of
Allium were screened for susceptibility to foliar bacterial soft rot
caused by Pseudomonas marginalis (Brown 1918) Stevens 1925 and P.
viridiflava (Burkholder 1930) Dowson 1939. Plants grown in a greenhouse
were wounded then co-inoculated with cell suspensions of P. marginalis
and P. viridiflava. A. cepa `Pukekohe Longkeeper' was highly
susceptible to foliage soft rot. Mean disease scores (0 = no disease; 5 =
severe soft rot) of the other Allium accessions ranged from 0 (an
accession of A. sativum) to 4.9 (A. fistulosum `White Lisbon').
Statistically significant differences in mean disease scores were detected
between accessions of individual Allium spp. and between different
Allium spp.
Keywords Allium spp.; onion; bacterial soft rot;
Pseudomonas marginalis; Pseudomonas viridiflava; disease resistance;
plant breeding
H97-29
Received 17 July 1997; accepted 24 November 1997
PDF file of entire paper: medium quality (379K); (scanned from paper original: notes about this process)
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