NZPPS   ·  Journal home   ·   Past issues  ·  This volume   ·   Previous abstract   ·   Next abstract

New Zealand Plant Protection 68 (2015): 328-331

Influence of leaf age on infection of Actinidia species by Pseudomonas syringae pv. actinidiae

J.L. Tyson, I.J. Horner, C.L. Curtis, A. Blackmore and M.A. Manning


The influence of leaf age on infection of Actinidia species by Pseudomonas syringae pv. actinidiae (Psa) was investigated using two approaches: (a) inoculation of potted 'Hayward' and 'Hort16A' kiwifruit plants and (b) inoculation of whole leaves in a detached leaf assay. Whole plants and detached leaves were spray inoculated with Psa biovar 3 (haplotype NZ-V; Psa-V) and maintained in a saturated environment. Flecking was evident on some of the leaves 8 days after inoculation. Many of the flecks later became necrotic spots with halos similar to the Psa leaf infections that have been observed in the field. With both methods, a higher percentage of leaves that were 1-3 weeks of age at inoculation had flecking and spotting than did leaves of other ages. Leaves that were 7 weeks or older did not show any symptoms of infection by Psa. Overall, leaves of 'Hort16A' showed slightly more flecking and spotting than 'Hayward'.

Keywords: Pseudomonas syringae pv actinidiae, Psa, bacterial canker, leaf age..

Related articles
pdfReview of the risk factors associated with kiwifruit bacterial canker caused by Pseudomonas syringae pv. actinidiae
K.J. Froud, K.R. Everett, J.L. Tyson, R.M. Beresford and N. Cogger (2015)
New Zealand Plant Protection 68: 313-327
pdfSystemic movement of Pseudomonas syringae pv. actinidiae in kiwifruit vines in New Zealand
J.L. Tyson, C.L. Curtis, M.A. Manning, J. Rees-George, W.P. Snelgar and P. Blattmann (2014)
New Zealand Plant Protection 67: 41-47
pdfSurvival of Pseudomonas syringae pv. actinidiae on the orchard floor over winter
J.L. Tyson, J. Rees-George, C.L. Curtis, M.A. Manning and R.A. Fullerton (2012)
New Zealand Plant Protection 65: 25-28

Copyright © 2015 New Zealand Plant Protection Society (Inc.).

Please refer to the terms of use.