New Zealand Journal of Crop and Horticultural Science abstracts
Development of resistance to picking wound entry Botrytis cinerea
storage rots in kiwifruit
PHILIP R. POOLE
LAURIE C. McLEOD
The Horticulture and Food Research Institute
of New Zealand
Ruakura Research Centre
Private Bag 3123
Hamilton, New Zealand
Abstract The effects of inoculation and coolstorage delays,
factors affecting fruit composition (harvest date, vine, soluble solids
content, position in canopy), and preharvest treatment with salicylic acid on
the incidence of Botrytis cinerea storage rots in kiwifruit were
investigated. `Hayward' kiwifruit picked during the 1992 and 1993 harvest
seasons with pedicels attached were inoculated by applying mixed germinated and
ungerminated Botrytis cinerea conidia to wounds formed by removal of the
pedicels. The incidence of rots was consistently high (82-88%) when inoculation
was within 0.1 h of picking and fruit was cooled rapidly. Where cooling and
inoculation were delayed the incidence declined significantly. In these
instances it varied with vine and harvest date with no apparent dependence on
fruit maturity. The salicylic acid treatment significantly reduced the
incidence of storage rots.
Keywords Actinidia deliciosa; kiwifruit; postharvest;
infection; Botrytis cinerea; salicylic acid; resistance
New Zealand Journal of Crop and Horticultural Science, 1994, Vol. 22:
387-392
0114-0671/94/2204-0387 $2.50/0 (c) The Royal Society of New Zealand
1994
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