摘要
The objective of this study is to examine whether or not the gains from reduced spraying for bollworms are being sustained more than one decade after the initial adoption in 2007. Based on farm-level data collected by the authors in 1999–2007 in 16 villages from 4 provinces, this study shows that insecticides applied for controlling bollworms have declined. This analysis supports Chinese policy makers’ decision to not require refuges of non-Bt cotton fields. It also suggests that past studies may have underestimated the benefits from adopting Bt technology.
The objective of this study is to examine whether or not the gains from reduced spraying for bollworms are being sustained more than one decade after the initial adoption in 2007. Based on farm-level data collected by the authors in 1999–2007 in 16 villages from 4 provinces, this study shows that insecticides applied for controlling bollworms have declined. This analysis supports Chinese policy makers’ decision to not require refuges of non-Bt cotton fields. It also suggests that past studies may have underestimated the benefits from adopting Bt technology.
基金
supported by the National Natural Science Foundation of China (Grant No. 70333001)
the GMO Program of the Ministry of Agriculture (Grant No. 2009ZX08015-002)
the International Development Research Center (Grant No. 105562-001)
the Knowledge Innovative Program of the Chi-nese Academy of Sciences (Grant Nos. KSCX-YW-09 and KSCX2-YW-N- 039)
the Rockefeller Foundation, Cornell University, and Oxfam for vari-ous years of the surveys from 1999 to 2007
