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Online CRW seminar helps growers and consultants adapt to Bt corn resistance - Freely available 24/7 on the Plant Management Network


St. Paul, Minnesota, USA
December 2, 2014

Since its commercialization in 2003, Bt corn has—and still is—proving to be an important technology for the control of insect pests, higher yield production, and higher quality grain.

In recent years, however, the western corn rootworm’s increasing resistance to Bt corn has caused some alarm.

Bt resistance has been confirmed to one or more Bt rootworm toxins in Nebraska, Minnesota, Iowa, and Illinois, and scientists in Colorado, Kansas, Missouri, New York, South Dakota and Wisconsin also are reporting significant damage in fields planted to corn hybrids containing Bt rootworm toxins.

To help U.S. corn growers and consultants tackle this growing issue, Dr. Robert Wright, Research & Extension Entomologist at the University of Nebraska-Lincoln, organized a seminar comprising five webcast presentations that focus on the many new and changing aspects of western corn rootworm management in the transgenic era.

This seminar, titled “Corn Rootworm in the Transgenic Era” is located in the Plant Management Network’s ‘Focus on Corn’ resource. All five talks are freely available 24/7 to corn producers, consultants, extension agents, and other practitioners involved with Bt corn and the management of western corn rootworm. These presentations, produced with funding from the USDA’s National Institute of Food and Agriculture, include:

  • Resistance Evolution and IRM for Rootworm by Dr. Aaron Gassman, Iowa State University. This talk reviews current developments of Bt resistance in the field, and what is known about the consequences of resistance for feeding injury and pest survival during future growing seasons. Gassman also covers approaches for managing western corn rootworm and the development of Bt resistance by this pest.
  • Adult Corn Rootworm Suppression by Dr. Lance J. Meinke, University of Nebraska-Lincoln. This presentation helps users incorporate adult western corn rootworm control tactics into a broader corn rootworm management program. He reviews aspects of adult western corn rootworm biology and ecology--and provides a general overview of the adult control strategy, tactics, and critical timing.
  • Decision Tree for Grower Management Options by Dr. Ken Ostlie, University of Minnesota. This webcast addresses the management challenges posed by resistance, review options, and provides growers, crop advisors, dealers, consultants and extension educators with a framework for making decisions on corn rootworm management. It also covers the pros and cons of individual management options, as well as points out which options are more effective.
  • Rootworm Biology and Behavior by Dr. Joseph L. Spencer, University of Illinois. This presentation helps users understand the biology and behavior of corn rootworms, especially the western corn rootworm. Dr. Spencer focuses on the details of basic corn rootworm biology, movement patterns and the characteristics of dispersing adults. He also highlights biological knowledge is one of the keys to making sound management decisions and understanding pest resistance.
  • Larval Corn Rootworm Management by Dr. Robert Wright, University of Nebraska-Lincoln. Since the introduction of Bt corn hybrids active against rootworm, larval control options and management practices have changed. This webcast helps growers understand the most current options for corn rootworm larvae control, factors affecting their efficacy, larval rootworm biology, and damage.

In addition to the webcasts, the seminar’s homepage features articles, as well as a Bt trait table that outlines current Bt proteins, their insect targets or herbicide activity, trade names, and other important information to make better management decisions.

All five webcast presentations are freely accessible 24 hours a day, seven days a week through the Plant Management Network’s (PMN’s) ‘Focus on Corn’ resource at www.plantmanagementnetwork.org/foc. Webcasts on a variety of other crops can be found in PMN’s Education Center, located at www.plantmanagementnetwork.org/edcenter.

‘Focus on Corn’ is a publication of the Plant Management Network, a nonprofit online publisher whose mission is to enhance the health, management, and production of crops through quality, science-based crop management information for agricultural practitioners. 

To help achieve its nonprofit publishing mission, PMN partners with more than 80 organizations, which include universities, nonprofits, and agribusinesses.

To get the most out of the Plant Management Network’s full line of resources, please sign up for PMN’s free electronic newsletter, PMN Update.



More news from: Plant Management Network International


Website: http://www.plantmanagementnetwork.org

Published: December 2, 2014

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