經(jīng)基因工程改造的可表達來自蘇云金芽孢桿菌(Bacillus thuringiensis)蛋白的農(nóng)作物常常被稱作Bt作物,這些作物可增加農(nóng)作物的產(chǎn)量并同時降低蟲害以及對其它殺蟲劑的需求,。
但是,,據(jù)5月14日的《科學》雜志報道說,,在中國北方對作物所做的一項為期10年的研究披露,Bt棉花的使用使得該地區(qū)害蟲種群的平衡發(fā)生轉(zhuǎn)變:蝽科蟲子的種群過去在該地區(qū)僅是一種次要的害蟲,,但最近卻有了急劇的增加,。
Yanhui Lu及其同僚將其在野外工作的數(shù)據(jù)進行了編撰,并首次報告了這一栽種Bt棉花的非計劃性后果的詳盡調(diào)查,。 這些研究人員提出,,蝽科蟲子種群在最近的爆炸式增長是因為在這一地區(qū)引進了這些基因改良的作物之后,傳統(tǒng)農(nóng)藥的使用有所減少之故,。 由于蝽科蟲子會吃范圍廣泛的植物,,Lu及其同僚說,這種害蟲現(xiàn)在第一次成為對其它作物(其中包括葡萄,、蘋果,、桃子和梨)的一種威脅。 這些發(fā)現(xiàn)證明,,針對某一特別害蟲的害蟲控制政策的改變會導致其它非目標性害蟲的擴散,。他們強調(diào)了在貫徹大面積的病蟲害治理策略之前分析這些可能性的重要性。(生物谷Bioon.com)
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生物谷推薦原文出處:
Science DOI: 10.1126/science.1187881
Mirid Bug Outbreaks in Multiple Crops Correlated with Wide-Scale Adoption of Bt Cotton in China
Yanhui Lu,1 Kongming Wu,1,* Yuying Jiang,2 Bing Xia,2 Ping Li,2 Hongqiang Feng,1 Kris A. G. Wyckhuys,1, Yuyuan Guo1
Long-term ecological effects of transgenic Bacillus thuringiensis (Bt) crops on non-target pests have received limited attention, more so in diverse smallholder-based cropping systems of the developing world. Field trials conducted over 10 years in northern China show that mirid bugs (Heteroptera: Miridae) have progressively increased population levels and acquired pest status in cotton and multiple other crops, in association with a regional increase in Bt cotton adoption. More specifically, our analyses show that Bt cotton has become a source of mirid bugs and that their population increases are related to drops in insecticide use in this crop. Hence, alterations of pest management regimes in Bt cotton could be responsible for the appearance and subsequent spread of non-target pests at an agro-landscape level.
1 State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193 P.R. China.
2 National Agro-Technical Extension and Service Center, Beijing, 100026 P.R. China.