时间：2025年5月23日（周五）上午11:30-14:00

地点：浙江大学紫金港校区成均苑9幢（公管大楼）112报告厅

主讲人：叶紫薇教授

题目：Too Much of a Good Thing: Lessons from Compromised Rootworm Bt Maize in the U.S. Corn Belt

摘要：Widespread use of genetically engineered maize targeting the corn rootworm complex (Diabrotica species) has raised concerns about insect resistance. Twelve years of university field trial and farm survey data from 10 US Corn Belt states indicate that maize hybrids expressing toxins derived from the bacterium Bacillus thuringiensis (Bt maize) exhibited declining protection from rootworm feeding with increased planting while pest pressures simultaneously decreased. The analysis revealed a tendency to overplant Bt maize, leading to substantial economic losses; this was particularly striking in eastern Corn Belt states. Our findings highlight the need to go beyond the “tragedy of the commons” perspective to protect sustainable use of Bt and other crop biotechnology resources. We propose moving toward a more diversified and transparent seed supply.

主讲人简介：

叶紫薇，现任中国人民大学农业与农村发展学院教授。2017年毕业于浙江大学农林经济管理系，获管理学学士学位；2022年获得美国密歇根州立大学农业、食品与资源经济学博士学位，并于同年加入中国人民大学工作。研究领域主要包括农业经济与政策、资源与环境经济学，现有研究聚焦于农业生物经济与政策问题，相关研究成果以第一作者发表于Science、PNAS等国际权威期刊。主持和参与多项国家自然科学基金项目及省部级委托课题。

主持人：茅锐，浙江大学中国农村发展研究院、浙江大学公共管理学院教授

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