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- Title
Pseudomonas syringae pv. actinidiae survival in point-inoculated kiwifruit vines.
- Authors
Tyson, Joy L.; Manning, Michael A.; Mellow, Kieran D.; Vergara, Michelle J.
- Abstract
The survival and spread over time of Pseudomonas syringae pv. actinidiae (Psa) in point-inoculated kiwifruit vines is poorly understood. Forty-eight 2-year-old vines of Actinidia chinensis var. deliciosa 'Hayward' and A. chinensis var. chinensis 'Hort16A' were inoculated 30 cm above the crown, either during the active growth (autumn) or dormant (winter) period in two successive years. Vines were cultivated for 3-4 years, after which bacterial isolations were made at intervals along the vines from crown to tip. Psa was found up to 220 cm above the inoculation point and, in some of the crowns, 30 cm below the inoculation point. The sites where Psa was found within vines were not always contiguous. Fewer vines of 'Hayward' developed serious symptoms or died than 'Hort16A'; however, more surviving vines of 'Hayward' were Psa-positive than those of 'Hort16A'. Psa was able to survive for at least 4 years in apparently healthy kiwifruit vines. This has implications for the movement of asymptomatic budwood to areas without Psa.
- Subjects
PSEUDOMONAS syringae; KIWIFRUIT; CLIMBING plants; BUDWOOD; BACTERIAL diseases of plants
- Publication
New Zealand Plant Protection, 2018, Vol 71, p45
- ISSN
1175-9003
- Publication type
Article
- DOI
10.30843/nzpp.2018.71.136