Effect of fungicides and calcium nitrate on shelf life of Kinnow mandarin
Loading...
Date
2020-08
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
CCSHAU,HiSAR
Abstract
The present investigation entitled “Effect of fungicides and calcium nitrate on shelf life of
Kinnow mandarin” was carried out at post-graduate laboratory of the Department of Horticulture, CCS
Haryana Agricultural University, Hisar during the year 2019-20. Spray of carbendazim, copper
oxychloride, mancozeb, propiconazole, nimbecidine, calcium nitrate and their combinations was done
ten days prior to harvesting on ten years old Kinnow plants in the experimental orchard of the
Department of Horticulture, CCS HAU, Hisar. Application of pre-harvest treatments was laid out in
Complete Randomized Design with three replications. Mature Kinnow fruits of uniform size, bruise
and disease free were harvested with the help of secateurs. The harvested fruits were brought to the
post-graduate laboratory and packed in corrugated fiber board boxes with newspaper lining. The boxes
were kept at an ambient temperature and relative humidity in the post-graduate laboratory. The
physico-chemical changes in the fruits were recorded at weekly intervals during storage. The fruits
harvested from the plants treated with fungicides, nimbecidine, calcium nitrate, and their combinations
exhibited significantly less decaying in comparison to the fruits of untreated plants. Carbendazim @
0.05% + Calcium nitrate @ 1% proved most effective treatment in checking the post-harvest decaying
of fruits followed by Propiconazole @ 0.05% + Calcium nitrate @ 1% . Both the treatments were
significantly at par in respect to reduction of decay loss. The minimum loss in weight was also
observed in Carbendazim @ 0.05% + Calcium nitrate @ 1% and Propiconazole @ 0.05% + Calcium
nitrate @ 1% . The physical and quality parameters viz., juice content, rag content, organoleptic rating,
TSS, acidity, TSS/acid ratio, reducing sugar, non-reducing sugar, total sugar of Kinnow fruits were
found non-significantly affecting with various pre-harvest treatments. Among all the treatments, the
maximum rind weight was observed in Carbendazim @ 0.05% + Calcium nitrate @ 1% (26.10%),
whereas the maximum ascorbic acid content (24.15 mg/100 ml of juice) was reported in Mancozeb @
0.2% + Calcium nitrate @ 1% during storage in Kinnow fruits. The most prominent pathogens
associated with decay loss were identified as Colletotrichum gloeosporioides, Diplodia natalensis and
Penicillium sp. during storage period.