SURVIVAL OF PSEUDOMONAS SYRINGAE PV. ACTINIDIAE IN LEAF-LITTER OF ACTINIDIA DELICIOSA IN GALICIA (NORTHWEST SPAIN)

O. Aguín, A. Ares, A. Abelleira, P. Mansilla
In Galicia (NW Spain), Pseudomonas syringae pv. actinidiae was first detected on Actinidia deliciosa and A. chinensis in 2011. The region is characterized by high annual rainfall and mild temperatures. These climatic characteristics might favour the persistence of the bacteria in leaves that have fallen on orchard soils during the senescence period. The knowledge of the survival period of Psa would allow developing better strategies for the control of the pathogen. The aim of the present work was to study the survival of Psa in fallen leaves until the plant was completely defoliated. The study was carried out in an orchard of A. deliciosa ‘Hayward’. Sixteen symptomatic plants were monitored. One plastic box was placed below each plant. Leaves fallen in boxes were collected weekly and processed by three methods: dilacerations, crushing and washing to study the presence of viable colonies of Psa. The three methods were successful in detecting Psa colonies. The bacteria remained active in the leaf litter for more than two months, representing a potential inoculum source for infection in the orchard.
Aguín, O., Ares, A., Abelleira, A. and Mansilla, P. (2015). SURVIVAL OF PSEUDOMONAS SYRINGAE PV. ACTINIDIAE IN LEAF-LITTER OF ACTINIDIA DELICIOSA IN GALICIA (NORTHWEST SPAIN). Acta Hortic. 1095, 111-115
DOI: 10.17660/ActaHortic.2015.1095.13
https://doi.org/10.17660/ActaHortic.2015.1095.13
autumn, bacterial canker, kiwifruit, leaf-fall, Psa
English

Acta Horticulturae