Abstract

During investigations on the European corn borer, Ostrinia nubilalis (Hübner), from different areas of southwestern Ontario, it was observed that some individuals in the culture from Guelph, Ontario, had tancolored head capsules in the egg stage and very light hued bodies as mature larvae. A culture started from some of these tan individuals has been reared for 5 successive generations without the appearance of any blackheaded larvae, indicating that the tan head color was not sex linked.

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