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Funded Project
Funding Program: Critical Issues
Project Title: Bt Resistance Screening to Inform IPM for Western Bean Cutworm
Project Directors (PDs):
Julie Peterson [1]
Brad Coates [2]
Lead State: NE

Lead Organization: University of Nebraska-Lincoln
Cooperating State(s): Iowa, Michigan, New York, Ohio
Undesignated Funding: $49,995
Start Date: Mar-01-2017

End Date: Feb-28-2019
Pests Involved: western bean cutworm, Striacosta albicosta
Site/Commodity: corn
Area of Emphasis: Bt resistance, extension
Summary: The western bean cutworm (WBC) is a destructive pest that causes severe yield loss and introduces secondary fungal infections in corn and dry beans. Although WBC infestations have historically been limited to the western Corn Belt, recent range expansion has positioned this pest as a threat to most of the North Central Region and beyond, with economic losses occurring in Great Lakes states, Ontario and Mexico. Current management tactics rely heavily upon transgenic Bt technology and/or the use of economic thresholds and insecticide applications. Stakeholders and extension professionals in multiple states have reported field failures of Cry1F (one of only two Bt proteins targeting WBC). Therefore, we propose the following objectives:
1) Expand Cry1F resistance screening beyond Nebraska and Kansas to include additional states (Michigan, Ohio, New York) to inform IPM practices across the region. Methods: Construct and deliver collection “kits” that include walk-in cages, black lights, oviposition cages, and egg collecting and shipping supplies, conduct trainings for each collaborator in their home state, and determine susceptibility of WBC populations to Cry1F proteins using lab bioassays.
2) Bring together WBC knowledge and experts to discuss and share findings and provide a training opportunity for those working in regions of the country that have not yet had intense/prolonged experience with WBC. Methods: Conduct a 1-day International WBC Symposium where current research, IPM knowledge, and extension tools for WBC management (WBC Speed Scout App, degree-day model) can be shared and record WBC Symposium to provide access to wide audiences not in attendance.


Objectives: 1. Expand Cry1F resistance screening beyond Nebraska and Kansas to include populations in additional states, such as Michigan, Ohio, New York, and others, to inform IPM practices across the region
a. Construct and deliver collection “kits” that include walk-in cages, black lights, oviposition cages, and egg collecting and shipping supplies
b. Conduct trainings for each collaborator in their home state upon delivery of kits
c. Determine susceptibility of WBC populations to Cry1F Bt proteins from across the Corn Belt
2. Bring together WBC knowledge and experts to discuss and share findings and provide a training opportunity for those working in regions of the country that have not yet had intense/prolonged experience with WBC
a. Conduct a 1 day International Western Bean Cutworm Symposium where current research, IPM knowledge, and extension tools for WBC management can be shared
b. Record WBC Symposium to provide access to wide audiences not in attendance
c. Provide hands-on trainings to demonstrate use of IPM tools, such as WBC Speed Scout App, and use of degree-day model
d. Disseminate extension resources and materials, such as ID kits with pinned WBC adults and preserved larvae for Symposium participants



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