European Corn Borer: Bt’s Landmark Target
The European corn borer, Ostrinia nubilalis, became a serious North American pest after its arrival in the early 1900s. Its larvae tunnel into stalks, weakening plants and cutting yields. In the 1990s it became a landmark target of genetic engineering: Bt corn was modified to produce insecticidal proteins from Bacillus thuringiensis, killing borers as they fed. Its success also made resistance management and non-Bt refuges essential. #agriculture