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Ontario Grain Farmer Magazine is the flagship publication of Grain Farmers of Ontario and a source of information for our province’s grain farmers. 

Western Bean Cutworm

MANAGING RESISTANCE

WESTERN BEAN CUTWORM, PHOTO CREDIT: TRACEY BAUTE.

WESTERN BEAN CUTWORM (WBC) is a significant threat to corn fields in Ontario. WBC feeding reduces yield and can cause contamination of grain with mycotoxins. Rotating methods of WBC control is important to mitigate the chance for resistance to develop. Currently, there are only two main tools available to help manage WBC — Vip3A transgenic corn and foliar insecticides. It is recommended that you rotate these options every year. This decision tree is a graphical representation of further recommendations on how to manage WBC.

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For further information on resistance prevention visit Resistance Prevention – Managing Western Bean Cutworm and Mycotoxins in Corn.

Tracey Baute is the field crop entomologist at the Ontario Ministry of Agriculture, Food and Rural Affairs and Art Schaafsma and Jocelyn Smith are researchers in plant agriculture at the University of Guelph Ridgetown Campus.

WESTERN BEAN CUTWORM DECISION TREE, A GRAPHICAL REPRESENTATION OF FURTHER RECOMMENDATIONS ON HOW TO MANAGE WBC.
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