A temative Strategy on Postharvest Diseases of Mango Control by Useof Low Dose of Ultraviolet-C Radiation.

TERAO, 0,1; BENATO, E.A,2; CAMPOS, J,S,de C, 3; ALBERS, C.C.M.3

1) Embrapa Semiarido/Embrapa Environment, Petrolina, Brazil. daniel.terao@embrapa.

br

2) ITAL, Campinas, Brazil.

3) UNICAMP, Campinas, Brazil.

Brazil is an important producer and exporter of mango. The quiescent infection of fungi thatcause decay has resulted in serious losses and has led growers to use fungicides in postharvesttreatments, resulting in chemical contamination of the fruit. The demand for alternative controlmeasures that are clean, safe and sustainable has increased in recent years and the use ofUV-C radiation is a potential option. This study focused on evaluating UV-C dose effect on in vitrodevelopment of fungi species and on postharvest decay on mango cv. Tommy Atkins. The fungicausing decay evaluated were: Botryosphaeria dothidea, Lasiodiplodia theobromae, Alternariaalternata and Colletotrichum gloeosporioides. Fungus mycelium was exposed to increasing dosesof UV-C radiation: O(control); 2,0; 3,0; 5,0; 10,0 and 20 k.l.rn". Mangos artificially inoculated withB. dothidea were treated with doses of UV-C radiation: 0,0; 0,5; 1,0; 2,5; 5,0; 7,5 e 10,0 k.l.rrr2. After treatments, the mangos were placed in storage at 10°C for 15 days and 3 days at 22"C, observing daily the rot symptoms to calculate decay control. The trials were conducted in acompletely randomized design with 6 replicates for in vitro tests and 4 replicates with seven fruitas experimental unit. The in vitro trials showed that even high doses of UV-C (20 k.Lrrr-) were notable to control the fungi development. Nonetheless, low doses of UV-C light around 2,5 k.l.m"controlled around 70 % of fruit rot severity. Higher doses (> 5 k.l.rrr") caused damage on mangopeel increasing the rot severity. Results suggest that the application of low dose « 3 k.Lrrr-) ofUV-C light can contribute to the integrated management of postharvest diseases on mango, andthat the control mechanisms involved are not directly on the fungi development.

Keywords:Mangifera indica; postharvest disease; integrated pest management.Acknowledgments:rsthanktheSãoPauloResearchFoundation(FundaçãodeAmparoàPesquisadoEstadodeSãoPaulo - FAPESP:2011/23432-8)forfinancialsupport.

F ESC~SE

Florianópolis/Brazil :: 2013

Intl!rnational Nonthl!rmalFood Pro[l!ssing WO,rltshopResearch and Innovation Towards [ompetitiveness

Organizers

FIESC~SENAI ~

POSTE R ABsTRACTs

Theme 1 - Food safety and Legislation

N° Title Presenter

12Aflatoxin Degradation by Aqueous Ozone in Different Maria de Lourdes SouzaMatrices

13Alternative Strategy on Postharvest Diseases of Mango Daniel TeraoControl by Use of Low Doses of Ultraviolet-C Radiation

14 Antifungal Effects of Ozone Gas against Toxigenic Maria Eduarda do ValeStrain of Wheat Pereira

Combined Nonthermal Treatments for Food15 Preservation: high hydrostatic pressure and essential Giovanna Ferrari

oil nanoemulsions

16 Conservation of BI Pulp by Gamma Radiation Lourdes Maria Cabral

Effect of Irradiation Setup and Modified Atmosphere

17Packaging on Radiation 010 Values for Salmonella M. Elena Castell-PerezTyphimurium LT2 and an Escherichia coli Cocktail inPecan Nuts (Kanza cultivar)

Effect of Pressure Levei and Holding Time on theSurvival of Escherichia Coli 0157 Shiga Toxin-

Sérgio Ramon VaudagnaProducing and Indigenous Microbiota on Cured BeefCarpaccio

Effect of Pulsed Electric Fields (PEF) on theInactivation of Saccharomyces Cerevisiae in Prickly Rebeca García-GarcíaPear Puree

Effects of High Hydrostatic Pressure on the InactivationWilson Rodrigues Pintoof Bacterial Metaloproteases Enzymes Associated To

JúniorMilk Spoilage

Efficacy of a Pulsed Electric Fields and Tangential-Flow Microfiltration Based Hurdle Technology for the Dipendra KhanalInactivation of Pathogenic E. coli, Salmonella, andListeria in Skim Milk

22Employment of Gamma Irradiation as a Patulin Marcelo Carneiro dosDecontamination Method Santos

23Evaluation of Aflatoxins Degradation Submitted to High

Otniel Freitas-SilvaHydrostatic Pressure

24Evaluation of Aqueous Ziziphus joazeiro Extract Like a

Bárbara AokiSanitization Agent on Lettuce

Influence of Spectral Distribution on Bacterial25 Inactivation of Fresh-Cut Mushrooms Treated With Ana Ramos Villarroel

Intense Light Pulses

18 à Internati~nal Nonthermal Food ProcE!ssing Workshop'~ Research and Innovatíon Towards Competítíveness

I eli 9 the Growth of Lactic Acid Bacteria in Chilled2~ .csen Meat, vacuum andmodified atmosphere Francisco Konkel

packed stored at different temperatures

27 Ozone Gas Exposure Induces Biological Effects on Maria Eduarda do ValePenícíllium Cítrínum Pereira

28 Potential of Electron Beam to Control AflatoxigenicOtniel Freitas SilvaFungi in Peanuts

Pulsed Electric Field and thermal Inactivation Kinetics29 of Escheríchía Colí and Pseudomonas Fluorescens in Roman Buckow

Milk

Reduction of Shígella flexnerí in Minced Beef by Means30 of Lytic Bacteriophages and High Hydrostatic Pressure Hanie Ahmadi

Processing

31 Relevant Factors Affecting Microbial Inactivation in Gianpiero PataroLiquid Food by Pulsed Light (PL)

FIESC~SENAI E~& 19