Growth and Seed Cotton Yields of Cotton Hybrids as Influenced by Bt Cotton Hybrids

摘要

Cotton plays an important role in Indian economy. Though India is largest cotton grower, the productivity (440 kg ha-1) is very low which is less than the world's average productivity (Anonymous, 2008). In cotton production, boll worm damage causes serious yield reduction; Genetically modified cotton, otherwise known as "Bt cotton" offers greater resistance to most important inspect pest of cotton i.e., bollworm. There is an increasing demand among the cotton growers to take up commercial cultivationof Bt cotton in A. P. Hence, it is essential to know whether the agronomic practices that are presently recommended for commercial cotton hybrids also hold good for Bt cotton hybrids or not. Therefore, the present investigation was taken up to study the performance of Bt cotton hybrids in comparison with a non-Bt hybrid under different plant densities.