Weather and inoculum factors associated with kiwifruit bud rot

Authors

  • M. Shahjahan Kabir Plant & Food Research
  • Bethan E. Parry Plant & Food Research
  • Joy L. Tyson Plant & Food Research
  • Michael A. Manning Plant & Food Research
  • Robert M. Beresford Plant & Food Research

DOI:

https://doi.org/10.30843/nzpp.2018.71.206

Abstract

Pseudomonas syringae pv. actinidiae biovar 3 (Psa) causes kiwifruit bacterial canker and also bud rot, which destroys developing flower buds and can become a severe problem, particularly in green-fleshed cultivars. The effects of weather and inoculum factors on bud-rot development were investigated. Experiments were conducted on two green kiwifruit cultivars: Actinidia chinensis var. deliciosa ‘Hayward’ and A. chinensis var. chinensis × A. chinensis var. deliciosa ‘Zesh004’ (known as Green14), at four sites for two consecutive years. Temperature and rainfall were recorded from bud burst to flowering and bud-rot incidence was monitored from approximately two weeks after flower bud appearance until flowering. Correlations between weather parameters and final bud-rot incidence, and between initial bud-rot and final bud-rot incidence were investigated. There was no significant association between temperature and final bud-rot incidence, but total rainfall and number of days of rain were positively correlated with final bud-rot incidence. Initial bud-rot incidence showed the strongest correlation with final bud-rot incidence and appeared to be the main factor that contributed to bud-rot.

Published

2018-07-30

How to Cite

[1]
Kabir, M.S., Parry, B.E., Tyson, J.L., Manning, M.A. and Beresford, R.M. 2018. Weather and inoculum factors associated with kiwifruit bud rot. New Zealand Plant Protection. 71, (Jul. 2018), 348. DOI:https://doi.org/10.30843/nzpp.2018.71.206.

Issue

Section

Poster Abstracts

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