Insect resistance traits

Asked October 20, 2014, 11:59 AM EDT

How quickly and how does corn rootworm resistance to insecticides and to a corn plants Bt traits develop?

Sioux County Iowa

1 Response

Hello:

Thank you for your message and for contacting Iowa State University. Here are articles explaining discovery of rootworm resistance to GMO corn. The authors listed in the articles are better sources of information than I am. Feel free to contact them.

http://www.extension.iastate.edu/CropNews/2011/1222hodgsongassmann.htm

http://www.extension.iastate.edu/CropNews/2012/0824gassmannhodgson.htm

http://www.extension.iastate.edu/CropNews/2013/0731hodgsongassman.htm

http://www.extension.iastate.edu/CropNews/2014/0820hodgsongassman.htm

According to the last article, resistance to the Cry3Bb1 toxin released in 2003 was documented in 2011. Field-dveloped resistance to mCry3A corn released in 2007 was documented in 2014.

Thanks.

Donald Lewis