Int. J. Biosci.14( 1), 563-569, January 2019
In order to investigate the impact of different plant growth regulators on the growth and yield of chillies cultivars, an experiment was conducted at National Tea & High Value Crops research Institute (NTHRI) during summer 2017. The experiment was laid out in Randomized complete block design (RCBD) with split plot arrangement having three replications. It consist of two chillies cultivars viz. Magma and wonder Hot which were allotted to the main plot and different types of Plant Growth regulators (PGR) viz., (i) control (without PGR), (ii) NAA (20 ppm), (iii) NAA (40 ppm), (iv) NAA (60 ppm), (v) GA3 (30 ppm), (vi) GA3 (60 ppm), (vii) GA3 (90 ppm) which were assigned to the sub-plot. The results of the experiment revealed significant variation among characters studied. Tallest plant (53.90 cm),more number of branches plant-1 (18.63), No of leaves plant-1 (75.02), fruit diameter (12.52mm), fruit length (15.00cm), fresh weight of 10 fruits (38.71g), Number of fruit per plant-1 (42.48) and yield (16.17t/ha) were found in cultivar Magma plots. In case of different Growth regulators, Maximum plant height (55.06 cm), greater number of branches plant-1 (22.09), number of leaves plant-1 (83.89), fruit length (16.04 cm), Fruit diameter (13.52 mm), fresh weight of 10 fruits (44.71g), number of fruits plant-1 (48.71) and yield (17.09 t/ha) were recorded from plots treated with naphthalene acetic acid (NAA) at the rate of 60 ppm. Whereas the minimum for these characters were obtained from control plots. In interaction between cultivars and plant growth regulators, maximum plant height (55.16.cm), number of branches plant-1 (22.20), number of leaves plant-1 (86.69), fruit length (16.16cm), fruit diameter (13.67mm), number of fruit plant-1 (49.26) and yield (17.17t/ha) were received from plants treated with naphthalene acetic acid (NAA) at the rate of 60 ppm in cultivars magma plots and minimum to these parameters were found in control plots in cultivar wonder hot. The results of the present study suggest that naphthalene acetic acid (NAA) can be practiced for increasing the production of chillies.
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