Figure 1. Leaf injury ratings (A) and occurrence of feral populations of Spodoptera frugiperda (B) on non-Bt and Bt maize containing single and pyramided genes in a field trial in 2013 in Collier Co., Florida.
Leaf injury ratings were measured at V9–V12 plant stages using Davis’s 1–9 scale17, while larval occurrence was recorded at R1 plant stage. NBt-1, Pioneer 31P40; NBt-2, DKC 61-22; NBt-5, N78N-GT; HX1, Pioneer 31D59; VT2P, DKC 61-49; SMT, DKC 62-08; VIP3, N78N-3111. Bars represent means (±SEM) and those with a common letter were not significantly different at α = 0.05 (Tukey’s HSD test).