Tray over-wrapping of 'Mosambi' sweet orange

Ladaniya, MS Singh, S

Ms. Ladaniya et S. Singh, Tray over-wrapping of 'Mosambi' sweet orange, J FD SCI M, 38(4), 2001, pp. 362-365

12

INGLESE

Article

Food Science/Nutrition

JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE

0022-1155 → ACNP

38

4

2001

362 - 365

ISI

0022-1155(200107/08)38:4<362:TOO'SO>2.0.ZU;2-P

'Mosambi' sweet orange (Citrus sinensis Osbeck) fruits were treated with th ree pre-harvest sprays of carbendazim (500 ppm) at 15 days interval before harvest, degreened with ethylene gas, washed (chlorinated water 1000 ppm) a nd treated with carbendazim (2000 ppm) on brush rollers before tray over-wr apping. 'Cryovac' heat-shrinkable films (polyolefin material) and LDPE heat -shrinkable and stretchable (Linear low density polyethylene) cling films w ere wrapped over trays, holding 6 fruits and stored at 25 +/- 5 degreesC an d 45 +/- 5 % relative humidity in vented corrugated fibre-board master boxe s (6 trays in a master box) for analysis after 20 and 40 days, Non-wrapped fruits served as control. Cryovac film-wrapped (BDF 2001, 30 mum thick; D-9 55, 15 and 25 mum thick) and stretchable film (15 pm) wrapped fruit had sig nificantly lower (1/9 - 1/16th) weight loss compared with that of non-wrapp ed fruits after 20 and 40 days. In LDPE (50 mum) heat-shrinkable film wrapp ed fruit, weight loss was 1/16 - 1/20th as against control. There was no sp oilage in any treatment up to 40 days except D-955 (15 pm) film (6.01 %) af ter 20 days. Rind colour development was not affected by wrapping of fruit in trays. Fruit firmness decreased slightly in most of the treatments after 20 and 40 days except in non-wrapped and SM-250 (perforated) film wrapped fruit, whose higher firmness was due to fruit dessication. Juice content si gnificantly dropped in non-wrapped and SM-250 film wrapped fruits due to wa ter loss. Ascorbic acid content declined with non-significant differences a mong the treatments; loss being more in control and SM-250 film wrapped fru it. Appearance and flavour were not acceptable after 20 days in control and SM-250 film wrapped fruit. Appearance was attractive (score more than 7 on 1-9 scale) and flavour was acceptable (score more than 7 on 1-9 scale) aft er 40 days in fruit wrapped with 'Cryovac' films especially D-955, LDPE hea t-shrinkable and stretchable cling film.