Table 4. Leaf injury rating and % plants containing live larvae (mean ± SEM) of Cry1F-susceptible (SS-TX) and -resistant (FL-39) strains of Spodoptera frugiperda on whole plants of non-Bt and Bt maize containing single or pyramided genes.

Maize hybrid/line	Maize trait	Leaf injury rating after 7 d		% plants containing live larvae after 12 d
		SS-TX	FL-39	SS-TX	FL-39
Non-Bt	NBt	3.75±0.16 c	4.1±0.15 c	87.5±5.59 e	84.4±5.98 de
Pioneer 31D50	HX1	1.13±0.07 a	4.31±0.33 c	0.00±0.00 a	75.00±10.21 cde
DKC 69–70	YG	3.21±0.36 c	3.50±0.40 c	60.4±6.25 bcde	56.25±6.25 bcd
Cry1A.105Ln	Cry1A-P	1.06±0.06 a	3.31±0.19 c	0.00±0.00 a	37.50±7.22 bc
Cry2Ab2Ln	Cry2A-P	2.06±0.12 b	1.88±0.07 b	18.75±6.25 ab	31.25±6.25 abc
Cry2Ab2Hn	Cry2A-HP	1.00±0.00 a	1.00±0.00 a	0.00±0.00 a	0.00±0.00 a
DKC 64-04	VT2P	1.06±0.06 a	1.19±0.12 a	0.00±0.00 a	0.00±0.00 a
DKC 62-08	SMT	1.00±0.00 a	1.00±0.00 a	0.00±0.00 a	0.00±0.00 a
N78N-3111	VIP3	1.00±0.00 a	1.00±0.00 a	0.00±0.00 a	0.00±0.00 a
Analysis of variance	Insect	F 1,75 = 89.73, P<0.0001		F 1,75 = 14.78, P = 0.0003
	Maize	F 8,75 = 196.09, P<0.0001		F 8,75 = 66.72, P<0.0001
	Interaction	F 8,75 = 31.6, P<0.0001		F 8,75 = 6.39, P<0.0001

Data were pooled for three non-Bt maize hybrids/lines which included DKC 61-22 (NBt-2), N78N-GT (NBt-5), and ExpH (NBt-6). n/a: Information is not available. Mean values followed by a common letter within a parameter measured were not significantly different at α = 0.05 (Tukey’s HSD test).