Evaluation of Newly Developed Bt Cotton (Cry 1Ac) Genotypes for Seed Cotton Yield under Ultra High Density Planting System in Cotton (Gossypium hirsutum L.)

Author: Baig K.S.*, Gaikwad A.R., Chinchane V.N., Pandagale A.D. and Surewad S.V.

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Abstract

Cotton being cash crop of rainfed growers have low productivity urging genotype wise change in plant density in particular. Bt cotton varieties having ‘Cry1Ac’ gene will reduce the cost of production of resource poor farmers. Hence, a field experiment was conducted to evaluate newly developed Bt cotton (BG I) genotypes of Gossypium hirsutum under Ultra High Density Planting System during kharif season 2019-20 at Cotton Research Station, Nanded. The experiment was laid out in FRBD design consisting of two factors of plant densities viz. 45 × 10 cm2 (2.22 lakh plants/ha), 45 × 15 cm2 (1.48 lakh plants/ha) and 45 × 22.5 cm2 (0.98 lakh plants/ha) in main plots and seven genotypes of Gossypium hirsutum cotton in sub plots with three replications. Density 0.98 lakh/ha (spacing 45 × 22.5 cm) out yielded significantly over density 2.22 lakh/ha (spacing 45 × 10 cm) for seed cotton yield. Genotype NH 1901 Bt (1458 kg/ha) and NH 1904 Bt (1458 kg/ha) were found significant over checks, NH

Keywords

Ultra high density planting, seed cotton yield, Bt cotton genotype, spacing.