methodology:- further information on the cultivation of BT cotton will be collected by interview method name of five people , reference,name of website . 3 page answers.
Answers
Answer:
Abstract
Bt-cotton varieties can control lepidopterous pests, hence offering the possibility to reduce chemical pesticide use. India, with the largest cotton-growing area globally, gave commercial approval for Bt cotton in 2002 and a rapid adoption of the technology is expected. This paper uses a stochastic partial budgeting approach that captures the key pest control properties of Bt cotton taking into account uncertainty of pest pressure, control effectiveness and prices to assess the profitability effects of Bt varieties and hence complements previous studies that generally excluded such issues. Results of the simulation model reveal that under the current price situation a prophylactic chemical control strategy dominates the use of Bt varieties in both, irrigated and non-irrigated cotton. The effect of a higher cotton price is assessed in a second scenario that depicts a Bt cotton variety with improved fiber quality than varieties currently approved for commercial planting. Under this assumption, the Bt strategy would be slightly better than the prophylactic use of chemical pesticides. The model can be extended to include pests other than the bollworm and correlations among variables, e.g. prices and yield, provided sufficient evidence for such correlation exists. Results of this analysis show the impact of uncertainty in the main variables that influence the profitability of Bt cotton and alternative crop protection methods.
. Les premières études sur le coton transgénique ont clamé sans nuance les impacts positifs pour les pauvres en Chine ( Pray et al., 2001), en Afrique du Sud ( Morse et al., 2004) ou en Inde ( Barwale et al., 2004). Des opinions plus équilibrées sont apparues par la suite (Hofs et al., 2006 ;Gouse et al., 2005 ;Qaim et al., 2006 ;Pemsl et al., 2004) ; il existe en effet des contraintes socio-économiques spécifiques dans les pays en développement (Stone, 2004). L'optimisme sur les impacts positifs pour les pauvres persiste néanmoins (Paarlberg, 2008), ce qui a conduit Glover (2010) à dénoncer une construction narrative minimisant les aspects négatifs du coton Bt. ...