Articles
FUNGAL DISEASES OF KIWIFRUIT STORED IN CONTROLLED ATMOSPHERE CONDITIONS IN NEW ZEALAND
Article number
444_111
Pages
725 – 732
Language
Abstract
The incidence of diseases in kiwifruit held in commercial coolstores under controlled atmosphere (CA) conditions was determined over two seasons in 2 CA coolstores with different refrigeration systems.
Fruit was held in bins for 22–24 weeks under CA conditions at 0°C. It was then graded and packed into single layer trays and held for 7 weeks in a non-CA atmosphere at 0°C to simulate New Zealand shipping conditions.
At the same time duplicate trays of fruit were held throughout the storage period under non-CA conditions at 0°C at each coolstore site (normal non-CA storage). After the 7 week holding period, CA-stored fruit was firmer than non-CA stored fruit, but the incidence of rots was significantly greater. Phomopsis spp. and/or Botrytis cinerea were associated with the stem-end rot symptoms in CA-stored fruit.
Discrete, sunken lesions (fungal pitting) occurring on the body of the fruit were associated with a Cryptosporiopsis sp. in most cases.
The incidence of stem-end rots and fungal pitting varied according to orchard and coolstore and also between seasons.
In addition to orchard and seasonal factors, both postharvest handling and refrigeration systems may contribute to the overall incidence of disease in CA-stored kiwifruit.
Fruit was held in bins for 22–24 weeks under CA conditions at 0°C. It was then graded and packed into single layer trays and held for 7 weeks in a non-CA atmosphere at 0°C to simulate New Zealand shipping conditions.
At the same time duplicate trays of fruit were held throughout the storage period under non-CA conditions at 0°C at each coolstore site (normal non-CA storage). After the 7 week holding period, CA-stored fruit was firmer than non-CA stored fruit, but the incidence of rots was significantly greater. Phomopsis spp. and/or Botrytis cinerea were associated with the stem-end rot symptoms in CA-stored fruit.
Discrete, sunken lesions (fungal pitting) occurring on the body of the fruit were associated with a Cryptosporiopsis sp. in most cases.
The incidence of stem-end rots and fungal pitting varied according to orchard and coolstore and also between seasons.
In addition to orchard and seasonal factors, both postharvest handling and refrigeration systems may contribute to the overall incidence of disease in CA-stored kiwifruit.
Publication
Authors
M.A. Manning, N. Lallu
Keywords
kiwifruit, controlled atmosphere, diseases
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