Source: University of Illinois

Concerns over potential black cutworm damage to corn have increased in recent weeks due to the continuing delays in planting across the Corn Belt, impressive winter annual weed populations in some fields, and heavy moth flights reported in many areas. Because the use of Bt corn has become the norm for many producers, questions often surface regarding the efficacy of these transgenic hybrids against pests such as black cutworms.

An article in the April 2011 issue of the Journal of Economic Entomology (Vol. 2, No. 104, pp. 484-493, DOI: 10.1603/EC10360) sheds some light on the interactions of black cutworm larvae with Bt corn and one insecticidal seed treatment. Authors Sigrun A. Kullik, Mark K. Sears, and Arthur W. Schaafsma are researchers with the School of Environmental Science, Ontario Agricultural College, University of Guelph and the Department of Plant Agriculture, Ridgetown Campus, University of Guelph. 

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