Effect of Different Edible Coatings on Quality and Shelf Life of Pears Under Supermarket and Ordinary Market Conditions

Figures & data

TABLE 1 Effect of Different Coatings on Physiological Loss in Weight (% PLW) in Pear cv. Patharnakh under Supermarket Conditions (20–22°C and 80–85% RH) and Ordinary Market Conditions (30–32°C and 60–65% RH)

	Supermarket conditions									Ordinary market conditions
Treatments	3	6	9	12	15	18	21	24	Mean	2	4	6	8	10	12	Mean
Citrashine coating	0.45	0.83	1.33	2.01	2.62	3.34	4.86	7.10	2.82	1.38	2.29	3.37	4.87	5.64	8.75	4.38
Carnauba coating	0.77	1.13	2.23	3.33	5.57	7.20	8.52	10.67	4.93	1.62	2.60	4.20	5.53	7.90	11.80	5.61
Sta-fresh coating	0.96	1.75	2.89	3.58	5.90	7.86	9.50	11.39	5.48	1.70	2.76	4.52	6.21	8.32	12.23	5.96
Terpenoidal oligomer coating	0.58	0.95	1.65	2.26	2.89	3.71	5.01	7.93	3.12	1.49	2.47	3.68	5.08	6.10	9.38	4.70
Control	1.69	2.50	3.93	4.59	7.56	8.97	10.75	13.70	6.71	3.60	5.78	9.79	12.22	16.37	2.50	8.38
Mean	0.89	1.43	2.41	3.15	4.91	6.22	7.73	10.16		1.96	3.18	5.11	6.78	8.87	8.93	0.00
	CD at 5% level									CD at 5% level
	Treatment = 0.17									Treatment = 0.50
	Storage interval = 0.16									Storage interval = 0.40
	Treatment × Storage interval = 0.48									Treatment × Storage interval = 1.20

TABLE 2 Effect of Different Coatings on Firmness (lb Force) in Pear cv. Patharnakh under Supermarket Conditions (20–22°C and 80–85% RH) and Ordinary Market Conditions (30–32°C and 60–65% RH)

	Supermarket conditions									Ordinary market conditions
Treatments	3	6	9	12	15	18	21	24	Mean	2	4	6	8	10	12	Mean
Citrashine coating	16.30	15.55	14.83	14.28	13.34	13.05	12.49	10.84	13.84	15.92	15.21	14.28	13.46	12.89	9.45	13.54
Carnauba coating	15.45	14.27	13.35	12.56	12.15	9.49	8.68	6.89	11.61	14.79	14.28	12.80	12.31	10.91	8.29	12.23
Sta-fresh coating	14.23	13.50	12.69	12.18	11.67	9.08	7.28	6.10	10.84	14.26	13.66	12.33	11.70	10.27	7.45	11.61
Terpenoidal oligomer coating	15.91	14.86	14.37	13.48	12.93	12.44	11.93	8.98	13.11	15.37	14.79	13.29	12.95	11.98	9.09	12.91
Control	14.00	12.88	12.50	12.00	8.92	7.85	6.70	5.29	10.02	14.20	12.36	11.30	8.00	6.90	4.95	9.62
Mean	15.18	14.21	13.55	12.90	11.80	10.38	9.42	7.62		14.91	14.06	12.80	11.68	10.59	7.85	16.80
	CD at 5% level									CD at 5% level
	Treatment = 0.27									Treatment = 0.39
	Storage interval = 0.26									Storage interval = 0.31
	Treatment × Storage interval = 0.78									Treatment × Storage interval = 0.95

TABLE 3 Effect of Different Coatings on the Sensory Quality (1–9) of Pear cv. Patharnakh under Supermarket Conditions (20–22°C and 80–85% RH) and Ordinary Market Conditions (30–32°C and 60–65% RH)

	Supermarket conditions									Ordinary market conditions
Treatments	3	6	9	12	15	18	21	24	Mean	2	4	6	8	10	12	Mean
Citrashine coating	7.16	7.35	7.50	7.69	7.83	8.05	8.17	7.20	7.62	7.11	7.23	7.38	7.60	7.78	6.17	7.21
Carnauba coating	7.09	7.18	7.26	7.40	7.51	6.68	5.83	5.15	6.76	7.07	7.16	7.25	7.28	5.95	5.49	6.70
Sta-fresh coating	7.06	7.14	7.18	7.32	7.36	6.12	4.72	3.50	6.30	7.05	7.12	7.20	7.19	5.68	5.15	6.57
Terpenoidal oligomer coating	7.13	7.25	7.38	7.51	7.69	7.85	8.02	6.98	7.48	7.09	7.20	7.31	7.42	7.55	5.80	7.06
Control	7.25	7.43	7.60	7.85	5.44	3.80	3.47	2.70	5.69	7.30	7.45	7.51	6.55	5.56	4.75	6.52
Mean	7.14	7.27	7.38	7.55	7.17	6.50	6.04	5.11		7.12	7.23	7.33	7.21	6.50	5.47	7.00
	CD at 5% level									CD at 5% level
	Treatment = 0.12									Treatment = 0.14
	Storage interval = 0.10									Storage interval = 0.09
	Treatment × Storage interval = 0.25									Treatment × Storage interval = 0.30

TABLE 4 Effect of Different Coatings on the Total Soluble Solids (%) of Pear cv. Patharnakh under Supermarket Conditions (20–22°C and 80–85% RH) and Ordinary Market Conditions (30–32°C and 60–65% RH)

	Supermarket conditions									Ordinary market conditions
Treatments	3	6	9	12	15	18	21	24	Mean	2	4	6	8	10	12	Mean
Citrashine coating	11.48	11.86	12.30	12.58	12.89	13.30	13.46	11.05	12.37	11.46	11.76	12.18	12.49	12.66	10.58	11.76
Carnauba coating	11.32	11.49	11.69	11.95	12.22	11.45	10.14	9.50	11.22	11.28	11.48	11.67	11.82	10.05	9.74	11.03
Sta-fresh coating	11.28	11.43	11.60	11.79	12.00	11.05	9.71	9.32	11.02	11.24	11.39	11.52	11.64	9.74	9.46	10.88
Terpenoidal oligomer coating	11.39	11.73	12.07	12.32	12.64	13.08	13.14	10.71	12.14	11.39	11.60	11.92	12.20	12.37	10.20	11.55
Control	11.55	11.95	12.41	12.70	9.61	9.30	9.14	9.00	10.71	11.66	11.88	12.00	10.86	10.55	10.30	11.21
Mean	11.40	11.69	12.01	12.27	11.87	11.64	11.12	9.92		11.41	11.62	11.86	11.80	11.07	10.06
	CD at 5% level									CD at 5% level
	Treatment = 0.16									Treatment = 0.10
	Storage interval = 0.12									Storage interval = 0.08
	Treatment × Storage interval = 0.30									Treatment × Storage interval = 0.17

TABLE 5 Effect of Different Coatings on the Total Sugars (%) of Pear cv. Patharnakh under Supermarket Conditions (20–22°C and 80–85% RH) and Ordinary Market Conditions (30–32°C and 60–65% RH)

	Supermarket conditions									Ordinary market conditions
Treatments	3	6	9	12	15	18	21	24	Mean	2	4	6	8	10	12	Mean
Citrashine coating	8.05	8.35	8.73	9.05	9.35	9.62	9.78	8.29	8.90	8.10	8.39	8.75	9.05	9.25	8.00	8.59
Carnauba coating	7.78	7.97	8.28	8.66	8.80	7.57	7.19	6.85	7.89	7.91	8.10	8.39	8.54	7.25	7.02	7.87
Sta-fresh coating	7.75	7.90	8.12	8.39	8.58	7.34	6.92	6.63	7.70	7.82	8.01	8.21	8.35	7.05	6.65	7.68
Terpenoidal oligomer coating	7.92	8.18	8.53	8.82	9.10	9.35	9.52	8.00	8.68	8.02	8.22	8.49	8.82	9.02	7.71	8.38
Control	7.90	8.50	8.95	9.16	6.85	6.42	6.20	5.85	7.48	8.36	8.78	8.90	7.86	7.59	6.77	8.04
Mean	7.88	8.18	8.52	8.82	8.54	8.06	7.92	7.12		8.04	8.30	8.55	8.52	8.03	7.23
	CD at 5% level									CD at 5% level
	Treatment = 0.13									Treatment = 0.15
	Storage interval = 0.12									Storage interval = 0.13
	Treatment × Storage interval = 0.28									Treatment × Storage interval = 0.24

TABLE 6 Effect of Different Coatings on the Titratable Acidity (%) of Pear cv. Patharnakh under Supermarket Conditions (20–22°C and 80–85% RH) and Ordinary Market Conditions (30–32°C and 60–65% RH)

	Supermarket conditions									Ordinary market conditions
Treatments	3	6	9	12	15	18	21	24	Mean	2	4	6	8	10	12	Mean
Citrashine coating	0.44	0.42	0.39	0.35	0.33	0.30	0.26	0.22	0.34	0.44	0.41	0.39	0.35	0.31	0.28	0.36
Carnauba coating	0.38	0.34	0.30	0.26	0.22	0.18	0.16	0.14	0.25	0.35	0.31	0.27	0.24	0.21	0.17	0.26
Sta-fresh coating	0.35	0.31	0.27	0.23	0.19	0.15	0.14	0.12	0.22	0.33	0.28	0.24	0.21	0.17	0.15	0.23
Terpenoidal oligomer coating	0.42	0.39	0.36	0.33	0.28	0.25	0.22	0.20	0.31	0.40	0.38	0.36	0.32	0.28	0.25	0.33
Control	0.34	0.29	0.20	0.17	0.14	0.12	0.11	0.10	0.18	0.30	0.24	0.20	0.15	0.12	0.10	0.19
Mean	0.39	0.35	0.30	0.27	0.23	0.20	0.18	0.16		0.36	0.32	0.29	0.25	0.22	0.19
	CD at 5% level									CD at 5% level
	Treatment = 0.01									Treatment = 0.02
	Storage interval = 0.01									Storage interval = 0.01
	Treatment × Storage interval = NS									Treatment × Storage interval = NS