Author(s):

R Ajaykumar and S Murali Krishnasamy

Abstract: Field investigations were conducted in the Wetland Farm, Department of Farm Management, Tamil Nadu Agricultural University, Coimbatore during rabi and summer seasons of 2016-17 and 2017-18 to assessing the performance of growth regulating compounds for mitigating induced moisture stress on the growth and yield of transplanted rice. Field experiments were laid out in split plot design with three replications. The treatments comprised of inducing water stress in different growth stage viz., panicle initiation stage, flowering stages, both panicle initiation and flowering stages, moisture stress free control (irrigating the field with 5 cm depth of irrigation one day after disappearance of previously ponded water), respectively in main plots and foliar application of growth regulating compounds in sub plots viz., chlormequat chloride at 200 ppm, mepiquat chloride at 200 ppm, brassinolide at 0.1 ppm, Pink Pigmented Facultative Methylotrophs (PPFM 1%) and Control (No spray). The treatment combination of moisture stress free control with foliar spraying of PPFM (1%) recorded higher growth attributes (CGR) at flowering and harvest stages and it was on par with brassinolide (0.1 ppm).

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