Author(s):

HV Korat, PD Kumawat, AV Savaliya and DJ Pansuriya

Abstract: A field experiment was carried out on medium black calcareous clayey soil of Instructional Farm, Department of Agronomy, Junagadh during rabi season of 2017-18 to investigate the role of foliar spray of bio-regulators (thiourea and thioglycollic acid) on wheat. The experiment was comprised of four level of thiourea (water spray, 250, 500 and 1000ppm) and three level of thioglycollic acid (water spray, 100 and 200ppm) sprayed twice at tillering and flowering stages. The experiment was laid out in randomized block design having factorial concept and replicated thrice. Experimental results indicated that with increasing concentration of thiourea up to 500ppm recorded significantly higher plant height, dry matter accumulation at harvest, number of tillers per plant, protein content, chlorophyll content (SPAD value), nitrogen and phosphorus content and uptake in grain and straw over water spray and 250ppm thiourea but remained at par with 1000ppm thiourea. Similarly foliar application of thioglycollic acid @100ppm, being at par with 200ppm significantly increased all growth parameters, protein content, chlorophyll content (SPAD value), N and P content and uptake in grain and straw over water sprayed control. Foliar application of thiourea and thioglycollic acid did not significantly influenced available nitrogen, phosphorus and potassium content in soil after harvest of wheat crop.

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