Open AccessWinter inoculum on the kiwifruit vines where is it hiding
Author(s) -
M. Shahjahan Kabir,
Bethan E. Parry,
Stephen A. Bent,
Seona Casonato
Publication year - 2016
Publication title -
proceedings of the new zealand weed and pest control conference/new zealand plant protection/proceedings of the ... national weeds conference/proceedings of the new zealand weed control conference/proceedings of the new zealand plant protection conference
Language(s) - English
Resource type - Journals
eISSN - 0370-2804
pISSN - 0370-0968
DOI - 10.30843/nzpp.2016.69.5921
Subject(s) - biology , actinidia chinensis , cultivar , actinidia deliciosa , actinidia , biovar , orchard , horticulture , fungal pathogen , botany , pathogen , agronomy , bacteria , genetics , immunology
The bacterial pathogen Pseudomonas syringae pv actinidiae biovar 3 (Psa) causes significant economic losses in the kiwifruit industry This pathogen can overwinter in kiwifruit without the plant showing visible symptoms Molecular tools developed to detect this pathogen from cultures had not previously been tested at an orchard level on dormant winter vines This epidemiological study aimed to detect and quantify the inoculum present on established vines over winter targeting the areas of the scion on the pergola The experiment was conducted on female and male vines of four cultivars Actinidia chinensis var chinensis Zesy002 (commonly called Gold3) A chinensis var chinensis Zesy003 (Gold9) A chinensis var deliciosa Hayward and A chinensis var chinensis x A chinensis var deliciosa Zesh004 (Green14) Psa biovar 3 was detected on the vines of all four cultivars with quantification of the inoculum load (cfu/ml) estimated Inoculum in all four cultivars increased from winter to spring and inoculum was distributed unevenly around the cankers This research indicates Psa can be present in asymptomatic tissue suggesting management of the vines for Psa needs to occur over the winter