Abstract
A 2-yr study was conducted to detrmine the effects of an infestation by 2nd-generation European corn borers (ECB), Ostrinia nubilalis, on resistance of maize, Z. mays, to stalk rot (SR) caused by D. maydis. SR infection had no effect on the ECB. SR damage was lowest in plots kept free of ECB with an insecticide and highest under high levels of infestation by ECB. Maize genotypes resistant to 2nd-generation ECB also were resistant to SR. In genotypes resistant to SR but susceptible to ECB, resistance to SR broke down under high levels of infestation by ECB.