Bt Cotton in China:Are Secondary Insect Infestations Offsetting the Benefits in Farmer Fields?  

作　　者：WANG Zi-jun LIN Hai HUANG Ji-kun HU Rui-fa Scott Rozelle Carl Pray 

机构地区：[1]Center for Chinese Agricultural Policy, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, P.R. China [2]College of Economics and Management, China Agricultural University, Beijing 100083, P.R. China [3]Shorenstein Asia-Pacific Research Center, Freeman Spogli Institute for International Studies, Stanford University, Stanford, CA 94305, USA [4]Department of Agriculture, Food and Resource Economics, Rutgers University, New Brunswick, NJ 08901-8520, USA

出　　处：《Agricultural Sciences in China》2009年第1期83-90,共8页中国农业科学（英文版）

基　　金：support by the Chinese Academy of Sciences(KSCX2-YW-N-039) and International Development Research Center,China

摘　　要：The area sown to Bt cotton has expanded rapidly in China since 1997. It has effectively controlled the bollworm. However, in recent years, concern has surfaced about the emergence of secondary insect pests, particular mirids, in Bt cotton fields. This study measures the patterns of insecticide use based on farm-level from 1999 to 2006, the analysis demonstrates a rise in insecticide use to control mirids between 2001 and 2004, secondary insect infestations is largely related to the rise of mirids, but this rising did not continue in more than half of sample villages studied in 2004-2006. Moreover, the increase in insecticide use for the control of secondary insects is far smaller than the reduction in total insecticide use due to Bt cotton adoption. Further econometric analyses show that rise and fall of mirids is largely related to local temperature and rainfall.The area sown to Bt cotton has expanded rapidly in China since 1997. It has effectively controlled the bollworm. However, in recent years, concern has surfaced about the emergence of secondary insect pests, particular mirids, in Bt cotton fields. This study measures the patterns of insecticide use based on farm-level from 1999 to 2006, the analysis demonstrates a rise in insecticide use to control mirids between 2001 and 2004, secondary insect infestations is largely related to the rise of mirids, but this rising did not continue in more than half of sample villages studied in 2004-2006. Moreover, the increase in insecticide use for the control of secondary insects is far smaller than the reduction in total insecticide use due to Bt cotton adoption. Further econometric analyses show that rise and fall of mirids is largely related to local temperature and rainfall.

关 键 词：Bt cotton secondary insect MIRID China 

分 类 号：S435.62[农业科学—农业昆虫与害虫防治]