EFFECTS OF GROWTH REGULATOR ON GUAVA

EFFECTS OF GROWTH REGULATOR ON GUAVA

Guava (Psidium guajava L.) is one of the most important and extensively cultivated tropical crops of NEPAL. It is good source of vitamin-C, pectin, also contains fair amount of calcium and widely used for making of jelly. The ascorbic acid content of guava is four-five times higher than the citrus fruit. It is hardy fruit which can be grown in alkaline and poorly drained soil.

An experiment was carried out to see the effect of plant growth regulators on yield and quality of guava cv. Allahabad safeda. Low production and poor quality of fruits are major constraints in guava production in Assam. The results showed significance difference among the treatments. The maximum yield (37.13 kg/plant), pulp weight (173 g), Juice content (63.17 cc), TSS (12.50 0Brix), ascorbic acid (135.30 mg/100gm), total sugar (10.13 %), seed weight (6.67 gm) and  sugar-acid ratio (33.13) was recorded under T5 (50 ppm GA3) while maximum pulp-seed ratio was recorded in T6 (100 ppm GA3.

EFFECTS OF GROWTH REGULATOR ON GUAVA

Treatments	Yield/plant	Pulp weight (g)	Juice content (cc)	Seed weight (g)	TSS (%)	Total sugar (%)	Ascorbic acid (mg/100g)
Control	12.17	75.40	25.23	4.50	7.90	6.30	64.27
2,4-D-10 Ppm	19.73	85.20	29.50	4.73	11.50	9.50	115.27
2,4-D-20 ppm	16.23	104.9	37.63	4.20	9.40	8.00	84.47
NAA-50 ppm	25.97	103.0	39.33	5.67	11.20	9.20	104.40
NAA-100 ppm	15.70	104.6	39.17	3.60	10.10	8.50	89.73
GA3-50 ppm	37.13	173.0	63.17	6.67	12.50	10.30	135.30
GA3-100 ppm	28.93	140.1	50.83	4.50	10.40	8.70	92.33
Ethrel-50 ppm	23.10	124.3	46.23	4.87	9.90	8.20	88.40
Ethrel-100 ppm	26.50	102.0	34.77	4.00	8.80	7.10	73.83
CCC-500 ppm	24.23	113.3	47.33	4.20	10.70	8.90	98.43
CCC-1000 ppm	32.53	101.1	34.27	4.23	10.40	8.70	92.37

THIS EXPERIMENT WAS DONE IN ASSAM OF INDIA. THERE WAS SIGNIFICANT DIFFERENCE IN BOTH QUALITY AND QUANTITY OF GUAVA WITH THE USE OF GROWTH REGULATOR. THE YIELD WAS HIGHER USING PGR THAN UNDER CONTROL SYSTEM. BUT QUALITY AND QUANTITY OF GUAVA WAS HIGHER WHEN GA3 PGR WITH CONCENTRATION 50ppm WAS APPLIED ON GUAVA PLANT.

This result article was published on 04 April 2017 by Narayan Lal1* and R.P. Das2 on their research article.

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