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Effectiveness of Thymus capitatus aerosol application at subatmospheric pressure to control green mold on "avana" mandarin fruit

Arras, Giovanni and Piga, Antonio <1965- > and D'hallewin, Guy (1994) Effectiveness of Thymus capitatus aerosol application at subatmospheric pressure to control green mold on "avana" mandarin fruit. In: International Symposium on Postharvest Treatment of Horticultural Crops, 30 August-3 September 1993, Kecskemét, Hungary. Wageningen, International Society for Horticultural Science. p. 382-386. (Acta Horticulturae, 368). ISBN 978-90-66052-36-9. Conference or Workshop Item.

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Abstract

A trial was carried out to compare the effectiveness of Thymus capitatus essential oil and thiabendazole (TBZ) on postharvest disease control of cv. "Avana" mandarin fruit. Fruits were sprayed with a 106 conidia/ml suspension of Penicillium digitatum and exposed to subatmospheric pressure (0.8 bar) in 250 litre containers. After 24 hours, atmospheric pressure was re-estabilished and fruits were stored at 8°C, 90 % R.H. While TBZ was used as a 1000 ppm water suspension before applying subatmospheric pressure, T. capitatus essential oil was fumigated as an ethanolic solution (20 ppm) immediately after. Fruits sprayed and treated with T. capitatus vapour compared to those sprayed, not treated, at subatmospheric pressure showed a 30.1 % reduction in green mold, while TBZ application gave a 39.1 % reduction. Thymus capitatus essential oil caused no injury in flavedo of ripe fruits. In vitro assays showed the minimum inhibiting concentration (MIC) and fungicide rate were 100 and 200 ppm respectively, for PDA cultures and wounded peels, both inoculated with 10 μl of a 106 conidia/ml suspension of P. digitatum.

Item Type:Conference or Workshop Item (Paper)
ID Code:1683
Status:Published
Uncontrolled Keywords:Thymus capitatus, subatmospheric pressure, essential oil
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/15 Scienze e tecnologie alimentari
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > CNR-Consiglio Nazionale delle Ricerche > Istituto di scienze delle produzioni alimentari, Sassari
001 Università di Sassari > 01 Dipartimenti > Scienze ambientali agrarie e biotecnologie agro-alimentari
Publisher:International Society for Horticultural Science
ISBN:978-90-66052-36-9
Deposited On:18 Aug 2009 10:05

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