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Northern Illinois Agriculture

University of Illinois Extension
Joe Spencer

Rootworm biology and management

Posted by Russel Higgins -

A concern of corn growers in several areas of the state is the efficacy of their 2014 Western corn rootworm management plan. Some Northern Illinois farmers were surprised when combining the 2013 corn crop, evidence of lodged corn and a corresponding dip recorded by yield monitors made many question their current rootworm management program. Is single-event Bt, stacked or pyramided corn varieties the best way to control corn rootworm larvae? Is a soil insecticide needed to guarantee greater control in 2014? On February 19th at a Rootworm Biology and Management meeting held at the NIARC Dr. Mike Gray, University of Illinois entomologist was asked that question, his response was as follows. If a single Bt event hybrid is being planted in an area that has exhibited rootworm control issues, the use of a soil applied insecticide will likely reduce the risk of rootworm feeding and provide an economic benefit. If planting a pyramided hybrid with multiple Bt events against the rootworm larvae, the chance of an economic return is unlikely when applying a soil applied insecticide. Rootworm management is a major concern across the entire Midwest. On February 20th a webinar "Corn rootworm management in the transgenic era" was presented by five land grant entomologists concerning western corn rootworm management challenges and recommendations. The webinar was supported by a USDA-NIFA North Central IPM Program grant and the recording can be watched at the North Central IPM Center homepage.

https://www.ncipmc.org/videos/index.cfm

2013 county yield results are in;

The 2013 estimated county yields for corn and soybean production have been released by the National Agriculture Statistics Service. The average corn yield for the state was posted at 178 bushels per acre; soybeans were 49 bushels per acre. 


All county yields can be accessed on the NASS web site

http://www.nass.usda.gov/Statistics_by_State/Illinois/Publications/County_Estimates/index.asp

 



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