Treatment Sampling periods (days after planting)
  30 daysns 60 days 90 days 120 daysns
Cry1Ab 0.05 ± 0.02 0.88 ± 0.15a 0.81 ± 0.11a 1.14 ± 0.09
CP4 EPSPS maize 0.018 ± 0.01 0.77 ± 0.15ab 0.84 ± 0.12a 1.06 ± 0.16
Pounce® 1.5G 0.05 ± 0.02 0.46 ± 0.09b 0.45 ± 0.07b 1.57 ± 0.18
Cry1Ab x Cry3Bb1 0.018 ± 0.01 0.75 ± 0.13ab 0.77 ± 0.09a 1.28 ± 0.27
Capture® 2 EC 0.036 ± 0.01 0.93 ± 0.19a 0.82 ± 0.12a 1.17 ± 0.18
Conventional corn 0.01 ± 0.01 0.65 ± 0.12ab 0.85 ± 0.08a 1.19 ± 0.16
Means within a column followed by the same letter are not statistically different from each other (SNK, P = 0.05). Ns = not significant. Pounce® 1.5G and Capture® 2 EC was applied on CP4 EPSPS maize
Table 1: Mean number of O. insidiosus (± S E) in BT transgenic maize hybrids and non transgenic insecticide treated and non-treated hybrids during the 2007 cropping season.