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ISHS Acta Horticulturae 1144: III International Symposium on Postharvest Pathology: Using Science to Increase Food Availability

Coniella granati - a new pathogen of pomegranates in Israel - postharvest fungicide screening for control of storage decay

Authors:   O. Nerya, A. Tzviling, H. Hibrahim, R. Ben-Arie
Keywords:   Coniella granati, pomegranate, captan, fludioxinil, fluopyram, prochloraz, tebuconazole, thiabendazole, trifloxystrobin
DOI:   10.17660/ActaHortic.2016.1144.69
Abstract:
Pomegranate storage duration is limited by postharvest physiological and pathological disorders. The latter include a wide range of pathogenic fungi: Botrytis cinerea, Alternaria spp., Penicillium spp., Aspergillus spp., Rhizopus stolonifer and Mucor spp. In 2010, a new pathogen causing fruit decay, Coniella granati, appeared in commercial storage rooms in Israel, causing considerable losses. The aim, of our study was to find a postharvest, fungicidal treatment to control decay development during storage. Pomegranate fruit picked in early November were wound inoculated with a C. granati spore suspension. After overnight incubation at 20C and 95% RH, the fruit were divided into 9 lots and dipped in 8 different fungicides, or left untreated as a control. The tested fungicides were: pyrimethanil, captan, fludioxinil, prochloraz, thiabendazole, fluopyram + tebuconazole, trifloxystrobin + tebuconazole. When dry, the fruit were cooled to 7C and packed in LDPE (Low Density Polyethylen) liners. After 3 months storage at this temperature decay incidence was monitored. The results showed that, among the fungicides tested, prochloraz and the two combinations containing tebuconazole were the most effective in controlling C. granati decay.

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