Abstract
Leaf Reddening in Bt Hybrid Cotton
Highlights
Ambati Ravinder Raju*Mahyco Monsanto Biotech Co (MMB) had commercially introduced Bt cotton hybrids directly under its supervision in 2002 with selected farmers under supplemental irrigations Mohan & Manjunath [1]
Bt hybrid cotton had initial hiccups like lower seed cotton yield, poor micronaire, leaf reddening besides lower price realzation by the early innovative farmers under rainfed and irrigated conditions except boll worm protection Ramanujam and Kuraganti, 2004 Stone [2]
Bt hybrid cotton was well adopted by small and marginal farmers under rainfed conditions into shallow to medium deep soils in Maharashtra state reached 65% of the cotton area in 2007 due to reduced expenditure on boll worms, synchronized boll bursting with seed cotton yield advantage of 5 q ha-1 with 30% more boll retention and 20 days earliness over non bt hybrid cotton Ramasundaram [3]; Hebbar et al [4]
Summary
Mahyco Monsanto Biotech Co (MMB) had commercially introduced Bt cotton hybrids directly under its supervision in 2002 with selected farmers under supplemental irrigations Mohan & Manjunath [1]. Bt hybrid cotton had initial hiccups like lower seed cotton yield, poor micronaire, leaf reddening besides lower price realzation by the early innovative farmers under rainfed and irrigated conditions except boll worm protection Ramanujam and Kuraganti, 2004 Stone [2]. Bt hybrid cotton was well adopted by small and marginal farmers under rainfed conditions into shallow to medium deep soils in Maharashtra state reached 65% of the cotton area in 2007 due to reduced expenditure on boll worms, synchronized boll bursting with seed cotton yield advantage of 5 q ha-1 with 30% more boll retention and 20 days earliness over non bt hybrid cotton Ramasundaram [3]; Hebbar et al [4]. BMPs remained on paper itself as the gulf between technology developers and users was widened with poor extension linkages and lack of interest of technology developers to go in for participatory mode
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