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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(12): 649-659
DOI: https://doi.org/10.20546/ijcmas.2020.912.078


Effect of Different Crop Regulation Methods and Chemicals on Growth, Flowering and Yield of Guava cv. Arka Mridula
P. Mishra1, G. Mandaland R. K. Tarai3*
1College of Horticulture Krishi Vigyan Kendra, Kendrapara, OUAT, India
2College of Horticulture Visva-Bharati, Sriniketan, India
3College of Horticulture, Chiplima, OUAT, India
*Corresponding author
Abstract:

A field experiment was conducted during 2016-17 and 2017-18 at Instructional Farm, Krishi Vigyan Kendra, Jharsuguda in Guava (Psidium guajava L.)” with an objective to evaluate the effect of plant growth regulation practices (both cultural and chemical methods) on vegetative growth, flowering and yield. The soil of the experimental orchard is red laterite and the climatic condition of the region is sub-tropical dry climate having hot and dry summer and mild winter. The experiment consisted of 8 treatments (T1:Control,T2: Shoot bending; T3: 10 cm pruning with complete removal of old leaves, in March-April; T4: 50 % fruit thinning randomly by hand at an average fruit weight 15 -20 g in March-April; T5: Foliar spray of Naphthalene Acetamide (NAD) @ 50 ppm twice at 15 days interval during March-April; T6: Foliar spray of (2, 4-D) @ 60 ppm, twice at 15 days interval in the during March-April, T7: Foliar spray of urea @ 15%, twice at 15 days interval during March-April and T8: Foliar spray of Dinitro Ortho Cresol (DNOC) @ 10ppm, twice at 10 days during March-April). These 8 treatments were evaluated in randomized block design with three replications. From the experiment, it was found that untreated treatment (Control i.e. T1) resulted tallest plant while minimum plant height was recorded in Bending (T2). The canopy spread in East-West and North-South were recorded highest in T3 (10 cm pruning). Number of days required for emergence of new shoot was recorded minimum of (18.00 & 19.2 days) shoot bending (T2) and 10 cm pruning (T3) respectively while it was highest (35.8 days) in the untreated control (T1). Shoot bending (T2) treatment took minimum days (43.5 days) while control plants (T1) took maximum days (50.5days) for initiation of flowers in the new shoots. The period required for fruit maturity varied from 126.7 days in bending (T2) to 134.5 days in control plants (T1). Shoot bending (T2) recorded highest number of fruits per plant during both the years and were significantly different from other treatments. Heaviest fruit (125.3g) was obtained in T5 (50 ppm NAD) followed by 124.2g in T3 (10cm pruning) and 123.7g inT6 (60 ppm 2, 4-D) whereas lowest fruit weight was obtained in control (108.4g). Similarly, 50 ppm NAD (T5) gave highest fruit yield (8.3 kg/plant) followed by T2 (8.1 kg/plant) whereas it was recorded lowest in control (6.3 kg/plant).


Keywords: Guava, Bending, Pruning, Thining, Chemicals, Growth, Flowering, Yield
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How to cite this article:

Mishra, P., G. Mandal and Tarai, R. K. 2020. Effect of Different Crop Regulation Methods and Chemicals on Growth, Flowering and Yield of Guava cv. Arka Mridula.Int.J.Curr.Microbiol.App.Sci. 9(12): 649-659. doi: https://doi.org/10.20546/ijcmas.2020.912.078