Detection of the Asian strain of bacterial canker of kiwifruit in Victoria, Australia

 

Revisione

Fecha de publicación

Vie, 23 Jun 2023, 06:09

Última actualización

Jun. 23, 2023, 6:09 a.m.

Número del informe

AUS-45/4

País

Australia

Plaga identificada

Pseudomonas syringae pv. actinidiae - (PSDMAK)

Estado del informe

Final

Hospederos

Actinidia species: A. deliciosa, A. chinensis, A. arguta, and A. kolomikta

Pest Status (old values from ISPM 8 -1998 )

• Present: only in some areas

Pest Status (ISPM 8 - 2021)

• Present: not widely distributed and under official control

Distribución geográfica

The pathogen has been detected on two properties in south-east Victoria

Resumen

Data is lacking on the epidemiology of the disease. It has been observed that the pathogen is active between 10-20 deg;C and is limited by temperatures above 25deg C. Inoculation studies showed that the bacterium can infect the plant through natural apertures (stomata, lenticels) and wounds. Symptoms are usually expressed during spring and autumn when climatic conditions are favourable to the disease (cool temperatures, persistent rains, high humidity). It is suspected that the bacterium is spread by heavy rainfall, strong winds, animals and humans. Over long distances, trade of infected planting material can spread the disease

Peligro

Bacterial canker of kiwifruit, caused by Pseudomonas syringae pv. Actinidiae, has been detected on two properties in SE Victoria. It was detected during surveillance following detections in New Zealand during late 2010. The growers indicated that the disease symptoms had been present for a number of years, but it was thought to be Pseudomonas viridaflava, which is endemic in Australia. There has been no loss of vines or production. Two strains of Psa are recognised, commonly referred to as the 'Italian' and 'Asian' strains. The results of specific PCR testing and DNA sequence analysis have confirmed the identity of the Australian isolates as Pseudomonas syringae pv. Actinidiae (bacterial canker) Psa 2 haplotype, also known as the 'Asian' strain. This strain is a 'mild' strain. Recent diagnostics have also confirmed a stored sample from a survey conducted in Western Australia in 1992 to be the same strain as the recent detections - Psa 2 haplotype.

Contacto para obtener más información

Australian Chief Plant Protection Officer Australian Government Department of Agriculture, GPO Box 858 Canberra ACT 2601 Australia [email protected]

Archivos de informes

Sitio web

Palabras claves del tema

Pest status:Present/Presence

Palabras clave del producto