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Department of Crop Agronomy, S.V. Agricultural College, ANGRAU, Tirupati-517 502.
A field experiment entitled “Study on foliar application of plant growth regulators for improving reproductive efficiency and yield of groundnut (Arachis hypogaea L.) genotypes” was carried out during Rabi, 2023-24 at wetland farm of S. V. Agricultural College, Tirupati campus of Acharya N. G. Ranga Agricultural University, Andhra Pradesh. The present experiment was laid out in randomized block design with factorial concept and replicated thrice, with four genotypes as factor-I (G1-Nithyaharitha, G2-Dharani, G3-K-6, G 4-Vishista) and plant growth regulators as Factor-2 (T 1- Control + RDF of NPK, T2-Prohexadione calcium@105 g a.i/ha at before and after peak flowering, T3- Putrescine@100 ppm at before and after peak flowering, T4- Paclobutrazol@ 100ppm at before and after peak flowering. With the objectives to study the effect of growth retardants on plant Phenological and Morpho-Physiological parameterss of Groundnut, to study the effect of growth retardants on reproductive efficiency of Groundnut and to study the effect of plant growth regulators on yield and yield components. Among the plant growth regulators studied, the maximum yield per plant was observed with T2 (Prohexadione Calcium@105 a.i/ha) (36.9g) and maximum harvest index was observed with T2 (Prohexadione Calcium@ 105 a.i/ha) (36.4%).
KEYWORDS: Reproductive efficiency, Paclobutrazol, Prohexadione calcium, Putrescine.