Iowa monarch conservation, pest management and crop production

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2017-12-01
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Bradbury, Steven
Professor Emeritus
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Grant, Tyler
Postdoctoral Research Associate
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Proceedings of the Integrated Crop Management Conference
Iowa State University Conferences and Symposia

The Iowa State University Integrated Crop Management Conference is Iowa's premier crop production education event. No other program in Iowa brings together the diverse range of topics, slate of expert presenters and results of the latest University research.

The ICM Conference offers workshops focusing on the latest in crop production technology. Experts from Iowa and surrounding states will provide research updates and results in soil fertility, soil and water management, crop production and pest management.

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Abstract

The monarch butterfly population has experienced an 80% decline in North America over the past two decades (Brower et al., 2012; Pleasants and Oberhauser, 2013; Jepsen et al., 2015). The three to four hectares of occupied overwintering forest in 2016 and 2015 was well below a target of six hectares needed to support a resilient population and reduce the risk of quasi-extinction (loss of the North American migration) in the next 10 to 20 years (Semmens et al., 2016). In response to a petition to evaluate the status of the species, the U.S. Fish and Wildlife Service (USFWS) is evaluating listing the monarch as a threatened species under the Endangered Species Act (USFWS, 2014 a, b). Under a court-supervised schedule, the USFWS must propose a listing decision in June 2019, which underscores the urgency of establishing viable, voluntary, state-based monarch conservation programs to provide USFWS a credible rationale to not list the species. If the monarch butterfly is listed, it could lead to significant regulatory andmanagement burdens for farmers and livestock producers.

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