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EFFECT OF PRE-HARVEST FOLIAR SPRAYS, PACKAGING AND STORAGE TEMPERATURES ON GROWTH, YIELD AND STORABILITY OF AFRICAN MARIGOLD (Tagetes erecta L.) Cv. PUSA NARANGI GAINDA

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Title EFFECT OF PRE-HARVEST FOLIAR SPRAYS, PACKAGING AND STORAGE TEMPERATURES ON GROWTH, YIELD AND STORABILITY OF AFRICAN MARIGOLD (Tagetes erecta L.) Cv. PUSA NARANGI GAINDA
 
Creator SAIDULU YELUGURI
 
Contributor Dr. A. GIRWANI
 
Subject Pre-harvest foliar sprays, growth, yield ,,inter nodal length
 
Description An investigation entitled “Effect of Pre-harvest foliar sprays, packaging and storage temperatures on growth, yield and storability of African marigold (Tagetes erecta L.) Cv. Pusa Narangi Gainda” was conducted under two experiments at Floricultural Research Station, Rajendranagar, Hyderabad during Rabi, 2012-2013.
The first experiment was laid out in RBD to study the effect of different pre-harvest foliar sprays viz., GA3 (50, 100 and 150 ppm), Salicylic acid (100, 150 and 200 ppm), Ca (NO3)2 (0.5, 1 and 2%), CaCl2 (0.5, 1 and 2%) along with the control (water spray) on growth, yield, quality, shelf life and xanthophyll content of marigold flowers. Pre-harvest foliar application of 150 ppm of GA3 has enhanced the plant height, number of branches per plant, inter nodal length, and reduced the days taken for first bud appearance. It also increased the receptacle length of flower, flower diameter, number of flowers per plant, flower yields/plant. On the other hand, pre-harvest application of salicylic acid (SA) at 200 ppm resulted in maximum fresh weight of flowers. Pre-harvest sprays of salicylic acid (200ppm) was found to be the best treatment next to GA3 as it increased flower diameter, number of flowers per plant, flower yield and storage life of marigold flowers under ambient conditions. Further, application of Ca(NO3)2 and CaCl2 at 2% has resulted in maximum moisture content in petals, increased flower yields and also recorded maximum shelf life under ambient conditions.
Pre-harvest foliar sprays had no significant influence on the xanthophyll content of the petals.
In second experiment, three best treatments from experiment-I were selected on the basis of flower quality and storage life to study the effect of packaging on storage life of flowers at ambient and cold storage (100C). The three best treatments viz., SA at 200 ppm, Ca (NO3)2 at 2% and CaCl2 at 2% along with control were packaged in five packaging materials viz., onion mesh bags and polyethylene bags with 0%, 1%, 2% & 3% ventilation and were stored
at ambient conditions and at 100C. Observations were recorded on physiological loss in weight (PLW), relative water content (RWC), storage life, xanthophyll content and marketability of flowers.
Among all the treatments, the loose flowers of marigold from the preharvest spray CaNO3 (2% ) packaged in 200 gauge polyethylene bags with 0% ventilation has recorded the minimum physiological loss in weight (PLW), relative water content (RWC) and maximum percentage of marketable flowers. The storage life of flowers was also extended by 2 days under ambient conditions and by 7days in cold storage (100C) when compared to control. The flowers without any pre-harvest sprays stored in onion mesh bags and 200 gauge polyethylene bags with 3% ventilation recorded maximum PLW, RWC and minimum storage life and marketable flowers. Among the two storage temperatures, the storage of the flowers at 100C has significantly slowed down the PLW and wilting of the flowers and increased the storage life of the flowers by almost 10 days when compared to the flowers stored at ambient conditions.
 
Date 2016-07-25T10:07:55Z
2016-07-25T10:07:55Z
2013-07
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69647
 
Language en
 
Format application/pdf
 
Publisher Dr. Y.S.R. HORTICULTURAL UNIVERSITY