Effect of Bio-stimulant on growth and development of Bt-cotton
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Date
2022-08-16
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CCS HAU, Hisar
Abstract
A field experiment was conducted during Kharif 2021 to study the effect of bio-stimulant on growth and development of Bt Cotton at Cotton Research Area, CCS HAU Hisar, Haryana. The experiment was laidout in factorial randomized block design (FRBD) with three replications. The treatments comprised of two cotton varieties RCH 776 (Bt) and H 1098i (Non Bt) in treatment A with four sprays of bio-stimulants i.e., B1: Bio-stimulant at 30,45 and 60 DAS, B2: Bio stimulant at 45,60 and 75 DAS, B3: DMSO* spray 30,45,60 and 75 DAS and B4: Control water spray-30,45,60 and 75 DAS in treatment B.
Cotton variety RCH 776 recorded significantly higher plant height as compared to H 1098i while plant height at harvest was not influenced due to spray of bio-stimulant and DMSO. The number of monopodia, no of sympodia and days to 50% boll brusting were statistically at par with each other in both of the genotypes and with spray of bio-stimulant. Boll weight in RCH 776 was higher as compared to H 1098i whereas boll weight was not significantly affected by spray of bio-stimulant. Significantly higher seed cotton yield was recorded with spray of Bio-stimulant B2 (Bio-stimulant at 45, 60 and 75 DAS) and B1 (Bio-stimulant at 30, 45 and 60 DAS) as compared to rest of the treatments.