Mortality (mean±S.E.) of <i>Ostrinia nubilalis</i> neonate larvae when fed on leaves of different maize lines; larval mortality was recorded after five-day exposure (experiment 1).

<p>[F = 65.88; P<0,001; df = 2,27]. 4Bt contained the Cry1Ac toxin, MON810 contained the Cry1Ab toxin, and M37W was the non-Bt near isogenic line of 4Bt. Different letters indicate statistically significant differences between the varieties (P< 0.001) when data were analysed by one-way (plant line) ANOVA.